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Bob
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« on: July 13, 2009, 08:17:53 pm » |
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Sense a few of ya asked about these monsters I figured I'ed show ya my toys
hehehehe
....
A valveless Pulse-jet is simply a Pluse jet without any reed valves in it at all
and the acoustics are actually what make it work...
there are no moving parts its simply a tube but it is configured in such a way as to allow one exhost pipe to suck in after the mixture explodes... this is because the Exhost pipe is much longer than the intake/exhost pipe... so as the hot gasses travel down the longer pipe the pressure inside is equilized and actually reverses
and begins to suck a small amount from the shorter pipe... this alows a fresh charge of gas/air into the combustion chamber and it explodes again... repeteing the cycle
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when running the silly things sound like a very large chainsaw engine....
...below is a pic of my biggest Valveless PJ... it is so extreamily LOUD that it viberated the fabric in my shirt, rattled the windows of the house and was so loud it actually Hurt... not in my ear pluged ears but all over....
and this one is only a 3" PJ.... a 6" will desolve a concrete wall with the sound alone... and I believe it !
it runs on Propane and uses about 2 gal per hr in fuel
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Bob....
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"Mother always told me "Son the Imposable is only a little bit harder"...and You know ... She WAS RIGHT!"
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Bob
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« Reply #1 on: July 13, 2009, 08:42:22 pm » |
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its also Nice to know that a well built Valveless PJ will sustain itself after the spark has been turned off and is throttle-able...which all of my PJ's are except the one in the photo as it doesn't like to take changes in throttle but it does to some extent....
this PJ here is my best running one , fully throttleable,and self sustaining
the pic on the right is my smallest PJ and runs as well as the other one.
the trick I found was the length of the exhost pipe... setting it up so I can adjust the length of the exhost pipe to find the "sweet spot" works best...then weld it up.
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Bob...
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"Mother always told me "Son the Imposable is only a little bit harder"...and You know ... She WAS RIGHT!"
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Bob
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« Reply #2 on: July 13, 2009, 08:53:05 pm » |
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the question is ...WHY ?
well their loads of fun to mess with and a Kick to finally get working properly.
they can be used as heaters but only put out about 2lbs of thrust from my biggest PJ !.... so that makes them great Noise makers and not much else ! HEHEHEHE
I built my 3" with the purpose of powering my Gyro's Rotor up to flight speed... however with the horrendous Noise one puts out I decided that 2 of them whirling around my head is not what I want to do ! LOL
so the task became can I build one or not... and I guess I can... <GRIN>
I made a ram jet engine as well but never got it to run... no matter what I tried
to my dismay !
...
so they sit and collect rust now and are available to waste Propane should I get the urge to loose more of my hearing ! HAHAHAHA
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I used a old magneto powered by my drill on the bench to fire the spark plugs...
a electric oven ignition unit is prefured by those that play with these all the time. but I used what I had on hand and only had to buy the propane!
....
they are Amuseing to say the least...
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Bob...
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"Mother always told me "Son the Imposable is only a little bit harder"...and You know ... She WAS RIGHT!"
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Tink
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« Reply #3 on: July 13, 2009, 10:32:49 pm » |
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Bob, You are a very strange man, LOL  Do yo think I could use on of those things to desolve my neibourgh's dog? Tink |
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Old Tink proberb: Don't hesitate, just do it!
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randy
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« Reply #4 on: July 13, 2009, 11:17:12 pm » |
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Bob said, "due to relentless boredom I think I'll build a jet engine and see if the house can survive it"
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Bob
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« Reply #5 on: July 13, 2009, 11:33:09 pm » |
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Tink... definately NOT... organic tishue is far to resiliant for anything but super High velosity sound waves.... with extream high amplitude....
You could however Desolve your neighbors House fairly easy if you put a 6" PJ in their basement ! LOL
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I am a very prolific Tinkier.... its what I like to do ! too bad it doesn't pay very well however ! hehehhe
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Tink have you ever given any thought to a solar still ? a 55gal drum with a bunch of mirrors focused on it to make your heat for the winter time ?
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it never ceases to amaze me how Hot the water gets in a garden hose that has laid in the sun for a few hours... it will scald you easy...so why not do that on purpose and cycle water through a wall of 55gal drums and then at night pump the hot water to car radiators for heat ?
....yah I'll do anything to keep from splitting wood ! HAHAHAH
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Bob.......
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Manta
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« Reply #6 on: July 14, 2009, 12:24:58 pm » |
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Bob, I tried to open the attachment and got a page full of very strange text. When I tried to 'reply' it to you for explanation I got a message saying that it contained 'black-listed' URLs. I'll try and email it to you. Not quite sure what it all means, but it doesn't look like a ram jet to me.  Manta |
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Bob
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« Reply #7 on: July 14, 2009, 02:11:16 pm » |
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Hummm strange !
the attached pics open fine for me ... they appear as thumbnails and I click once on them and wait a very long time and they get bigger....so ya can see them in the correct size.
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dunno what your doing Manta ... sounds like it crashed to me ! HEHEHE
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Bob...
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Tink
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« Reply #8 on: July 14, 2009, 06:38:31 pm » |
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I just tried to view one in large size and it worked fine
Tink
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Old Tink proberb: Don't hesitate, just do it!
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Manta
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« Reply #9 on: July 15, 2009, 05:30:01 am » |
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Bob, Tink.
Something strange going on.
If I single click on any of Bob's attachments (on this thread) I get the usual 'do you want to open/save this file dialogue box. So far so good.
If I select 'open' it won't open the file. If I select 'save' it saves the file, but then won't open the saved file. Tells me it is corrupt or an incompatible format. I don't have trouble with other *.jpg files opening.
But try this. double click on the paperclip. Let me know what happens.
Manta
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Tink
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« Reply #10 on: July 15, 2009, 07:35:28 am » |
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Manta,
The same thing happens to me. I've never tried to open them that way. I just ckick on the image itself and it gets much bigger.
Tink
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Old Tink proberb: Don't hesitate, just do it!
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Manta
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« Reply #11 on: July 15, 2009, 09:48:33 am » |
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Tink,
I can't even get the image.
Do you get the text if you double click the attachment ?
I'll email the text to you. Keep it in it's text format as I don't now what it is, but am very worried about it as it seems to be updating itself every time it is accessed.
Bob, did you get my email ?
If so, what do you and Ferel make of it.
Tink,
Just worked out what you mean by 'clicking on the image'. I aren't getting an image. Only a 'paperclip' attachment icon and the filename 'BobzPJ 006.jpg' . It's when I click on this that the problems begin.
Sorry to be going on about this, but it has me worried.
Manta
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« Last Edit: July 15, 2009, 10:13:43 am by Manta »
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Manta
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« Reply #12 on: July 15, 2009, 09:54:21 am » |
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Bob, p.s. It does it on all three of the attachments. It looks like some kind of virus. I've hit my machine with all the bug-killers at my disposal, but they all report no problems. Going to try it from work tomorrow.
Manta
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Manta
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« Reply #13 on: July 15, 2009, 09:56:33 am » |
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Tink,
When you say ' the same thing happens to me' what do you mean exactly ?
Manta
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Bob
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« Reply #14 on: July 15, 2009, 02:33:21 pm » |
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I see what you guys are fussing at NOW....
I got Feral in here and she said something is amiss... looks like someone added a advertisement to it or some links or something... soon as she can get on the net with her machine she'll fix it.... My computer here doesn't have the required program on it or she'd do it now......
I don't think its anything to worry about, just Links BS that someone thinks their being clever and attaching them to the pictures...
One click on the picture does still work however (makes it biger...be patient, its slow sometimes!)
but if you try to DL the pic and save it you get something else completely...a list of links... strangely enough !
...if I find out who did that I'll ban them from the site !
idiots !
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thanks for letting me know
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Bob.......
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Tink
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« Reply #15 on: July 15, 2009, 11:26:09 pm » |
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Manta,
When I ckick on the paperclip i get the File Download Box and then I tell it to download and I try to run it and get 'No preview available' like it is empty. But when I click on the image here on the fourm it gets bigger. Sounds like Bob has a handle on this one...
Tink
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Old Tink proberb: Don't hesitate, just do it!
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Bob
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« Reply #16 on: July 16, 2009, 01:49:21 am » |
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Tink... Not as much of a Handle as I'ed like....
looks to be a file appended to every pic Download.... why I have no idea and Feral is still looking into it...its just not right... the problem is we can't find where its coming from... it Looks like it is at the Host server at "Pair Network" but we're not sure yet... may take a few days to track down.
As i said on the other thred, if you have any of those pics on your Hard drive that don't load up properly be on the safe side and delete them.
the ones that load up fine arn't a worry <grin>
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I get the same thing as Tink gets Manta... so something is appending itself to the downloader.... why ? thats anyones guess ! but it shouldn't last much longer !
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I have used "drag and drop" the photos before to the desktop and not had any problems looking at them afterwards... I wonder if you guys can use that with no problem too?
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Bob.........
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Manta
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« Reply #17 on: July 16, 2009, 11:45:13 am » |
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Bob, thanks for that,
A couple of points though.
1, Did you get the email ?
2, Note I don't get the thumbnail pictures.
I'll attach a screen dump that shows what I mean.
Manta
P.s. The pictures on 'what kind of set up do you have' are ok. It seems to be this thread.
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« Last Edit: July 16, 2009, 12:02:49 pm by Manta »
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Cowboy
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« Reply #18 on: July 16, 2009, 03:45:17 pm » |
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I can see your image just fine Manta, I think Bob is just teasing us. I was thinking it was my OS that didn't like images on this site.
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Bob
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« Reply #19 on: July 17, 2009, 01:45:49 am » |
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Ummm.. nope Cowboy I not be teasing ya....
I am running Monzilla Firefox and it puts up a thumbnail of the pictures for me to look at... I think Tink is using Monzilla as well but not positive...
it looks like your using internet explorer... and that could be 90% of the problem right there.... burried down deep in there somewhere is options that you can turn on to show thumbnails (if I remember right) and also the type of pictures it can VIEW
its worth a peek to see if you have something turned off that should be on HEHEHEHE
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actually...I realy have no idea.... I do know that something is attaching itself to the downloads....most of the time....NOT ALWAYSE which is very weird!
...Feral will sort it out soon though I am sure...
I don't have the paitiance nore knowledge for that stuff anymore....hehehee
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I put 6 wall switch covers togather last night in a parallel setup useing the bolts as power leads like the "Randy Cell" got done with 6 and decided to check it with the VTOM and only one had continuity... HEHEEHHEHE all the rest were floating nicely...unfortionately that is NOT what they were supposed to be doing! HAHAHA
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so back to square 1
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Bob........
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crb
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« Reply #20 on: July 17, 2009, 08:43:26 am » |
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Bob, I can't get your images either, also your site has really slowed down.
crb
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Manta
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« Reply #21 on: July 17, 2009, 10:18:30 am » |
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Cowboy,
Can you see the pictures on the 'What kind of set up do you have' thread ?
By the way, this bit of text may be helpfull, it is at the bottom of the garbage that comes when I double click.
Date: Tue, 14 Jul 2009 17:12:40 GMT
Server: Apache/2.2.10
Connection: Keep-Alive
Keep-Alive: timeout=5, max=99
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: private
Vary: Accept-Encoding
You'll notice the date. That changes every time it is accessed. You can see when I first found it. Got to be a virus.
Bob,
As for the original subject. The same principle is used on the Comprex compressors. Also in high performance auto engines.
CRB,
Are you also getting the text when you double click the paperclip ? You may need to vary the speed of the clicking for it to happen.
Manta
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Bob
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« Reply #22 on: July 17, 2009, 11:40:54 pm » |
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Feral has ran a virus checker on the site, found nothing, but that doesn't mean a thing, there could still be one in there that the checker doesn't know how to look for ...
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we may simply just upgrade the site to the next verson ...or perhaps use another software for the site all togather.
Feral is working on it, although she has plunty to do at the moment...
I have no fear she will FIX it !!!!
hehehehehe
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Bob...
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Cowboy
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« Reply #23 on: July 18, 2009, 04:26:00 am » |
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Bob, I am running Mozilla as well, I'm just running it on Ubuntu instead of Windows.
Manta, Yes I can. It can be a virus or just a corrupt file. Either way it needs to go away.
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crb
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« Reply #24 on: July 18, 2009, 08:18:07 am » |
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Manta,
It tells me one or files are corrupted.
crb
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Manta
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« Reply #25 on: July 18, 2009, 11:28:28 am » |
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crb,
I was thinking along the lines of the picture having been replaced by some kind of text file or virus. But retaining the original filename and filetype (.jpg). I.e the attachment I got isn't a picture. That would explain why my photo suite can't open it.
I'm pretty sure it is some kind of virus as the date in the text is updated to the current date every time you open it. A simple corrupt picture file wouldn't produce this. It would just scramble the pic or produce rubbish.
Bob,
How big was the original file ? Could you post it again and we can see if it happens or if the thumbnail appears as it should.
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Manta
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« Reply #26 on: July 18, 2009, 11:31:02 am » |
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Cowboy,
I'm thinking of moving over to Linux and have Ubuntu. Also have Suse. What virus killer are you using ?
Manta
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Bob
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« Reply #27 on: July 18, 2009, 04:12:02 pm » |
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Ok Manta here's another pic...
the size of this one is 161 KB (165,780 bytes), size on disk was a bit bigger.
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and yes that thing is Very HOT ! LOL
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Bob....
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Bob
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« Reply #28 on: July 18, 2009, 04:22:38 pm » |
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OK thats strange... I can DL that one with no problem and view it too in the small size or regular size....
only thing I did differently was change the file name from #003.jpg.014jpg to just .014jpg...( as it should have been)... a bunch of my picx have that added .JPG added to the file name as I screwed up when copying them....I wonder if thats all it is ?
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Hummmm
so who can see that pic ?
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Bob........
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"Mother always told me "Son the Imposable is only a little bit harder"...and You know ... She WAS RIGHT!"
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Cowboy
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« Reply #29 on: July 19, 2009, 04:00:03 am » |
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Manta,
I have no virus killer. No need for one since it is Linux after all. If I do somehow contract a virus, there are bigger problems than having to get rid of it. I have setup my comp exactly how I want it right now, so there is no reason to add anything else other than updates, and those I only accept from Canonical.
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Bob
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« Reply #30 on: July 19, 2009, 08:13:14 am » |
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So can you guys see that last pic I posted above ?
I have no problem seeing it ...how about you guys ?
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Bob.......
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"Mother always told me "Son the Imposable is only a little bit harder"...and You know ... She WAS RIGHT!"
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Manta
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« Reply #31 on: July 19, 2009, 08:49:07 am » |
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Bob, That pic appears as a thumbnail and works as it should. Also it will open properly from the paperclip. Man, I can feel the heat from that unit.
Can you re-post the original trouble maker. BobszPJ 006.jpg I think. I want to compare them.
Cowboy,
re,....No need for one since it is Linux after all. ...
Hate to be the bringer of bad news, but there is already a linux virus out there. Read about it in New Scientist a while back.
Manta
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crb
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« Reply #32 on: July 19, 2009, 09:14:11 am » |
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Bob,
Still doesen't work, also I get a "x" for all avatars.
crb
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Bob
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« Reply #33 on: July 19, 2009, 11:02:38 am » |
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Thanks for the input guys !
CRB...it sounds like that is on your end... probably one of your settings sense I dunno what your running I can only guess that its a setting somewhere that tells the brouser not to load any graphics at all.... just a wild guess at that!
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Manta...
Here is the same pic I posted before...(at least I think it is!) except that I changed the name of it
question is...can you see this one too ? <grin>
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Bob.
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Bob
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« Reply #34 on: July 19, 2009, 11:08:17 am » |
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here it is I dug it out of the Recycle bin... heheheh
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Bob
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« Reply #35 on: July 19, 2009, 11:15:29 am » |
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I think I understand NOW !
the files that are corrupt are ones with a Hifen in the file name.
a long time ago I ran into a similar problem and it was on one of the first BBS programs we were running, my Kid discovered my problem and took one look and said well Yah Dad ! you can't have a file name like that ! <Like DUH !>
...I thought we were all over those kind of problems but I betcha we're NOT~!
... I will be very careful about the file names and I bet there will be no more problems!
LOL !
Bob...
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Manta
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« Reply #36 on: July 19, 2009, 12:12:21 pm » |
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Bob,
Yeh, it works fine now, But the mystery isn't quite over yet (do I here you groaning).
Look at the file sizes.
The original up on post ........ is 159.45.The one you dug out the bin is also 159.45 Kb. The spelling of the filename is the same. So why does it work now ?
The new file is 156.88 Kb . But there won't be 2.57 Kb difference in the names. It would be interesting to do a file compare on the files and find out what the difference is.
All very odd.
But at least it is all working. Thanks for sorting it out.
Manta
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« Last Edit: July 19, 2009, 12:20:10 pm by Manta »
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Bob
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« Reply #37 on: July 19, 2009, 10:14:10 pm » |
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well, I'm thinking its a bug in the Forum program myself NOW...
if you have an "IMPROPPER FILE NAME" it adds some garbage to it ... ( like a good robot would...) ...
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Now if we can get CRB to see the pics and Cowboy too we'll be really cooking!
LOL
Bob.......
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crb
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« Reply #38 on: July 20, 2009, 08:02:27 am » |
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Bob,
Nope, get the same corrupted files bs.
It does run normal though, it was really slow when i would
change pages.
Only on your wed site! Don't know what to tell you.
crb
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Bob
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« Reply #39 on: July 20, 2009, 08:33:47 am » |
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OK CRB....
one thing that you can do on this forum that slows things down allot is
at the bottom of the page where it indicates which page you are on is poke the "ALL"
button... that will load ALL the pages for that thread and that slows down things allot...
periodically, I have experienced what looks like massive LAG to the site, but I am on dial up and I am fairly used to that...
... I think I will get Feral to upgrade to a better version of the software...regardless.... and hopefully that will cure most of our problems along those lines...
I know when Feral was using Linix and Wine to simulate windows everything was so slow it was painful !!!!!!! personally I'ed rather use Linix than any windows product just because the way Microsoft does business ! but untill Linix is 100% capable of operateing all windows programs I ain't going to touch it again!
...I am sure that Windows holds back on critical information to software developers just so they are buggy... that wouldn't supprize me one bit!
...however when the thieves run the world you have to become a thieve to survive!
and so it goes with windows...
I use windows...but I hate it with a passion! LOL
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Bob......
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Feral
Sugar and Spice
Administrator
Newbie
Posts: 44
Voof!
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« Reply #40 on: July 20, 2009, 07:31:47 pm » |
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Only on your wed site! Don't know what to tell you.
I do... 
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« Last Edit: July 20, 2009, 09:41:34 pm by Feral »
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"Fall seven times, stand up eight." ~ Japanese Proverb
"Do, or do not. There is no try." ~ Yoda
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Feral
Sugar and Spice
Administrator
Newbie
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« Reply #41 on: July 20, 2009, 09:37:08 pm » |
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Now that I have 'net access again I can work on this again.
In short the site was hacked, seemingly link farmer ad garbage secreted away behind the pages, or in the case of the attachments prepended to each breaking them very well indeed. Mind, the files on the server were not bothered rather the ad garbage was prepended when the file was requested it seems.
But regardless, now, in theory this will both work and behave again. Please say if you encounter any problems or weirdness of any kind. Thank you kindly and I offer my apologies for the delay.
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« Last Edit: July 20, 2009, 10:03:29 pm by Feral »
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"Fall seven times, stand up eight." ~ Japanese Proverb
"Do, or do not. There is no try." ~ Yoda
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crb
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« Reply #42 on: July 21, 2009, 09:16:45 am » |
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feral, Bob,
All is well again,
thank you, crb
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Bob
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« Reply #43 on: July 21, 2009, 12:17:49 pm » |
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Fantastic ! glad to hear it CRB and thank you for the feedback !
...
How about you Cowboy ? can you see the pictures now ?I know you've alwayse had truble viewing them!
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Feral did Upgrade the Forum for us ...its the latest version I believe and supposed to have allot of bug fixes...
...anyway, Hopefully.... it will be all better now ! LOL !
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Feral gets (not just 1 but...) 2 cookies for that ! <GRIN>
thank you very much I know you worked on it all day and would have rather been doing something ...anything else ! Thank You FERAL !
...
Bob.......
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"Mother always told me "Son the Imposable is only a little bit harder"...and You know ... She WAS RIGHT!"
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Manta
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« Reply #44 on: July 21, 2009, 12:34:11 pm » |
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feral, Add my name to the thanks list. And take an extra cookie, he won't notice .  Manta |
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Good questions have a sting in the tail.
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Tink
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« Reply #45 on: July 21, 2009, 08:12:41 pm » |
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Feral,
Yea, take the whole box! All nooks normal now and I don't get that delayed typing while posting. I know how much time and effort this thing takes. I had a 'Bulitenboard' runing on an old Kaypro 4 years ago before the internet. that computer didn't even have a HD in it. Just 2 390k floppies. I ran the buletinboard SW on the 1st drive and the second drive I switched everyday with new files and stuff to download. That was even before windows, I was running CPM. It was really great when me and my buddy hacked the system to run a whoppin 5mhz up from 2.5mhz. That doubled the speed. I even had to cut the case with metal nippers to install another fan to keep it cool. I was one of the first 'Sysops' to get a free 1200bd modem from US Robodics. I don't miss the 'Good old days'.
Tink
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Old Tink proberb: Don't hesitate, just do it!
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Manta
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« Reply #46 on: July 22, 2009, 03:35:02 am » |
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Tink,
At least with cpm you could vary the size of the disk sectors to make them fit the size of your files. Not like the massive waste you get today due to the huge sector size on the modern hard drives. I reckon that at least 30% of our drives are wasted because you can't utilize the bytes in the sectors fully.
Manta
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Good questions have a sting in the tail.
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Tink
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« Reply #47 on: July 22, 2009, 06:54:20 am » |
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Manta,
So true. I remember a file taking only 2k would take 4 or even 6k when I started using windows. And these 64bit OS in Windows Vista Preminum with its larger sector is really waistfull. Last time I defraged it counted over 65,000 files on this system. I only see maby a few hundred on a daily bases. Really makes you wonder what is going on in the background. The old days were good in the respect that you had complete control of your machine. Now you turn on your system and don't have any idea what is happening. I even unplug mine when I'm not using it. I don't want anyone (or a corperation) using my system as part of a computer farm to do their evil deeds. Enough said.
Tink
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Old Tink proberb: Don't hesitate, just do it!
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Bob
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« Reply #48 on: July 22, 2009, 10:37:14 am » |
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I don't know if you can still do it or not but the block size and sector size was changeable at one time... the problem with that was it may save HD space but really slowed down the file search which made the whole system slow sense most of Windows is file driven now... the days of loading your OS once is long sense over! now it loads it as needed which makes it terribly slow in the best of circumstances.
... I used to program allot in Basic,GWbasic and into Turbo C and then C++ but when things gravitated to "object oriented programming" it left me... to this day I can't get the hang of "that way of thinking"
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from what I understand Windows VISTA is a Nightmare ! I'm useing windows XP Professional and I am very glad I got it instead of any other "VERSION" although we have found a few bugs in it (Feral and I) there isn't many... its just SLOW as compaired to Dos.... but then again its not the same animal eather this is a system management program designed to do everything you can think of...
and DOS was simply a Disk operateing system and thats all... you loaded the BIOS back then and it was what mainly did all the work...
I remember Up gradeing the BIOS too.... but in the last 15 years I havn't hurd a thing about that.... I think this machine uses a BIOS that is dated at 2002...and YOU KNOW that they have better Bios out by now... but try to find it and install it.... good luck !
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Some times the advancements of the present day take us a few steps backwards instead of forwards.... Most of the computer world is like that... its all controled to make someone some big bucks in the long run...
there was some talk of an Analog computer about 5 years or more ago... but that got swept under the rug quickly.... most people just figured it was someones dream or something I guess, but the benefits of an Analog computer system instead of a didgital are fonimial ! but I suppose Our buddy Bill Gates had a hand in stopping that in its tracks as well.
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Oh well... it will be interesting to see what the future holds for the Home computer.... I Imagen it will degrade to a simple "terminal" that you pay monthly fees to.... after all its RESIDUAL income they are after!
...and who knows it might even be worth it ! LOL
....
Bob......
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"Mother always told me "Son the Imposable is only a little bit harder"...and You know ... She WAS RIGHT!"
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Cowboy
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« Reply #49 on: July 22, 2009, 03:01:47 pm » |
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I use Ubuntu, with a dual boot to Windows 7. I don't really get on Windows 7 anymore because I like Ubuntu that much more, but Windows 7 beats the shit out of Vista. It doesn't use the memory like Vista, though the interface is basically the same. Win7 is what Vista was supposed to be, but the dipshits in charge pushed Vista out the door before it was ready. I still prefer Ubuntu because I have control over what goes on. That doesn't matter to the average user I guess, but it does to me. I'm not a computer genius by any means, I'm just a control freak. |
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Bob
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« Reply #50 on: March 06, 2011, 08:19:26 pm » |
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OK this is weird !
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I dug out the old PJ's the other day and thought I'd try to get them to run....
well they are really rusty.... inside and out ....but their structural integrity still looked good...
and I made or should say "slapped together" another smaller PJ just for the heck of it...
so I tried to get the new small one to run.... no luck at all ... it acts like its not getting enough air
it won't even run with a hair dryer blowing into it....
so I grabbed my trusty medium sized PJ that always ran the best.... hooked it all up and I cannot get it to fire up... it'll pop and fart all over the place but it will not sustain ! ... I tried all my PJ's except the bigger 3" one because it was just so loud! .... the smaller ones did run before and run very well... However NOW the darn things won't run at all ! ....
the only thing I can figure is the rust is inhibiting the gasses so much that they refuse to cycle
its either that or perhaps the Altitude at which they were made at near 5000ft ASL has made that much difference in the mix of air and propane... I'd think that could be adjusted for by the hair dryer blower and the amount of gas given it.... HOWEVER I tried just about every combonation I can think of to get the silly things to run but to no avail ! ....
Now I am really curious as to WHY ! ... heheheheh
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the new small PJ I made seams clear that it has too small of an intake on it...., its not rusty like the rest... so I'll modify the intake on it and see what that does !
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Bob.....
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"Mother always told me "Son the Imposable is only a little bit harder"...and You know ... She WAS RIGHT!"
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randy
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« Reply #51 on: March 07, 2011, 05:55:48 am » |
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maybe your regulator is gummed up?, I had a tank refilled a few years ago, plugged up everything I hooked it to, there was a thick black oil substance in the tank, probably some kind of stabilizer for winter use, used carb cleaner to get everything going again, I've had the same problem several times, just don't let the carb cleaner get into any hoses, It'll eat em up.
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Bob
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« Reply #52 on: March 07, 2011, 02:55:12 pm » |
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Humm... never seen thick black junk in a propane tank but I do know that propane is notoriously DIRTY as HECK! trying to keep the propane powered fork lift trucks running at Hoyte water heater co. in Reno was my job for about 2 years.... takes a re build about every 2 to 3 months of the pressure regulators and replace the diaphragm on the carb ....
they went to that because of the DANGER of spilled gasoline.... I had to laugh because we had a 8gal tank full of propane stick wide open one time.... I hauled it out into the desert about 1/4 mile away at about 2:00am one morning.... the guys were running amok in panic ! ....
if that puppy would have lit off it would have leveled the building! and it was a big building!
... I was constantly getting black soot out of everything on those things... its filthy, stinky, nasty stuff! that is for sure!
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Nope that can't be it, because I was getting more than plenty of fuel... I could blow torch the PJ's by turning up the fuel .... had a flame 2 to 3 feet behind the tail pipe !
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Really in actuality I am completely STUMPED as to why they won't run !.... I tried to use the spark plug igniter... and just a torch.... it worked better with the torch but they would not sustain... I got my good one to growl quite erratically for a little bit by holding the air/blower just right and having the propane way down.... I was trying to let it warm up ... I finally got it quite warm but it would not run on its own....
.... it bugs me so much that I am going out to see if I can get them to run again.... LOL!
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I did my work on the house already today , got the new florescent light up and plugged in to the light switch.... WOW is it ever bright ! .... that Kitchen really needed that thing ! HAHAHAHA!
.... so I'm headed out to play with the PJ's a bit... I'll see if I can clean the insides of my good one and make it shinny inside once again ... steel wool on an iron rod should buff it up fairly fast!
... we shall see !
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Hope ya get that cell all hooked up and plumbed today Randy I think this is the only clear day we'll have this week ! batten down the hatches tonight ! its coming again!
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Bob........
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"Mother always told me "Son the Imposable is only a little bit harder"...and You know ... She WAS RIGHT!"
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randy
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« Reply #53 on: March 07, 2011, 04:07:58 pm » |
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well got the holes re drilled, everything's gonna fit now, wife's headed for seattle so had to check out the car, oil water pwr steering fluid brake fluid tire pressure ect. clean out the junk lol, found a couple nylon hose barbs, but need more from somewhere. Yep sounds like weather's going downhill tonight, nothing new around here, I'll collect more rainwater lol, been rinsing out empty 2 ltr pepsi bottles my wife guzzles, milk jugs, juice jugs, amazing how much junk is flying around in the air here, there's specs of dirt in it so I use a coffee filter to clean it out. as far as getting the cell installed it didn't happen but will very soon. "I think"
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Bob
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« Reply #54 on: March 07, 2011, 07:55:15 pm » |
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LOL ! you use a coffee filter ! I filled my cell a bit ago from a pan with leaves and pine needles in it.... just didn't add the junk <GRIN>.... then I discovered 2 more leaks on the darn container...
what I glued with gurilla glue leaked like a sive! ... so I dumped out the water took it into the shed , drilled out a hole where the gurilla glue was and put the silicone in the hole.... that'll fix it!
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I think I'll run outside and empty the old water and leaves out of a trash can out there and that way I can have CLEAN rain water ! HAHAHAHHAHA!
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good idea on the coffee filters I have to admit !
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Never did get any PJ's to run.... got one to rumble a bit but thats all.... I put an extension to the tail pipe and Imediately the thing began to run!.... this lower elevation has changes the acoostics of the engine I think.... I'd have thought that a PJ could run in just about any elevation...but it isn't looking very good for that.... looks like I need to add a few inches to each PJ to get them to run..... the air is thicker down here ! LOL!
....WEIRD!
Bob
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"Mother always told me "Son the Imposable is only a little bit harder"...and You know ... She WAS RIGHT!"
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Bob
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« Reply #55 on: March 09, 2011, 10:23:05 pm » |
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Well I think I discovered part of the problem...
I wasn't feeding the Pulse jets enough fuel !
I cranked up the fuel feed and finally got my good o'l trusty PJ to run a bit.
I then switched to the other PJ's and got most of them to run for a second or two.... but they were running marginally.... not perfectly...and I expect it again was fuel feed.
because shortly there after My Propane tank was DRY ! LOL
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I even hooked up the Big PJ and tried it ... that one I know will run but runs better with a extension added to the exhaust pipe.... I got it half way running on its own and then held the same size pipe to the end of the tail pipe and it took off and ran just perfectly....
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I think now the combination of the PJ's being Rusty inside and the lower elevation and the lack of fuel has conspired to make the PJ's almost imposable to get running...
I'll get more Propane soon and increase the orface size of the tubing at the feed point and try it again....
although I made up an igniter it seams useless, I have been using a torch to get the things going
not their spark plugs...( oddly enough!)
... the use of a Hair dryer as a blower is the only way to get them running NOW.... before they would all take off and run with a simple blow from the mouth.... not any more however...
that signifies a resistance to air flow... because of the rust inside the chambers....
I have yet to find a rod long enough to put in the drill and clamp the end of the rod around a gob of steel wool to clean them up.... I think this is essential to getting them to run properly again!
....
Bob...
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"Mother always told me "Son the Imposable is only a little bit harder"...and You know ... She WAS RIGHT!"
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randy
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« Reply #56 on: March 10, 2011, 04:23:01 am » |
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I've made some pretty good sand blaster nozzles with water pipe that worked pretty good, blasted paint and rust right off nicely, you probably have everything you need to make one already, pretty simple to make, if you want I can draw up a diagram for you but you do need an air compressor, i built mine using a gravity fed 5 gallon bucket hanging from rope over a beam, the venturi inside the pipe is the only almost complicated part, used a faucet valve to control the air flow.
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Bob
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« Reply #57 on: March 10, 2011, 06:31:10 am » |
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DUH ! never thought about sand blasting the things.... I have a nice sand blaster here already... no sand... but I can get some ! .... I ought'a get some real fine stuff so as not to pit the surface of the metal eh ? or would course/mutly purpose sand-blasting sand be good enough ?
... that sounds a bunch easier than a rod and steel wool on it ! LOL !
... Thanks Randy !
...
Bob.....
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"Mother always told me "Son the Imposable is only a little bit harder"...and You know ... She WAS RIGHT!"
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randy
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« Reply #58 on: March 10, 2011, 02:11:32 pm » |
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coarse stuff will do it quickly, living here near mt st.helens I've got an unlimited supply, just find a piece of tube and extend the nozzle so you can reach inside, should smooth things out nicely.
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Bob
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« Reply #59 on: April 25, 2011, 06:26:43 am » |
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HAY ! I got one of my PJ's to Run yesterday ! the smaller "O'l reliable" PJ.... I changed the fuel inlet
tube a bit... I had it crimped too much... so I opened it up a bit... and that seamed to do the trick!
.... seams my Fan is weak too... doesn't push as much air as it used to up on the hill, and I think that is a major problem getting the PJ's started.
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a properly tuned PJ will start first try... so obviously mine arn't very good! LOL
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I saw a Home video of a fella on Pulse jets.com that had his PJ so well refined that he could turn on the fuel, push the ignition button and it would fire up... he did that about 3 times to prove his point... saying if its done right there is no problem with them starting right every time!
this fella (Larry Cartrell, I believe) is a master at fabrication and design of the PJ's he comes up with new designs quite often.
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I received some info from Bruno Ogerlek about the Logan study on PJ's for rotor tip application on helicopters...done in the 1950's ... and it is really informative ! seams that even the valveless PJ can be made to produce 30~35lbs of thrust or more ! I was quite surprised !
oddly enough the study came to the conclusion that the valveless PJ wasn't good enough for the rotor application.... I don't understand why but they were trying to turn a 111ft rotor in the spin test and could not achieve enough RPM even with 4 engines !!!!!
but perhaps with a smaller rotor they would work fine ... I am not sure!
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I tinkered with my "Flapper valve" PJ yesterday as well ( note I did not call it a Reed valve PJ)
anyway the PJ tried several times to run in short spurts... but would not sustain
... I changed the fuel to be added directly into the combustion chamber... and that seamed to help it a great deal.... I think with a longer exhaust pipe it will run ... but that remains to be seen!
...
Bob...
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"Mother always told me "Son the Imposable is only a little bit harder"...and You know ... She WAS RIGHT!"
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Bob
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« Reply #60 on: April 27, 2011, 01:37:50 am » |
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I did a bit of playing around with the PJ's the last couple of days , when taking a break from cutting and burning brush...
so far I have got the Old big PJ working but only by adding a piece to the tailpipe.
... I got the "Old reliable" running the other day
so that left the Funny looking one and the super tiny one...
so I took the "funny looking one" and was thinking about it and desiced to shorten the INTAKE pipe to one inch (just eyeballed it and lopped it off) the theory being that it is a bit too small to begin with , shortening it may give it that much more flow... not much but maybe enough...
... also there is the aspect of tail pipe length to intake pipe length.... I got to thinking that
sense the Logan study only messed with intake pipes as a short side line study that an intake pipe wasn't needed... and if you think about the operation of the PJ the shorter the intake the shorter the tail-pipe can be..... sense I did get this one to run using an addition to the tailpipe but not without it... that told me the tail pipe was too short to begin with... so shortening the intake served 2 purposes.....(more fuel air and shorter exhaust)
so I lopped off the intake ...
the results were fairly good it ran easier, if you can call it that...but it was still hard to get started. adding just a short section of tailpipe in addition made it run fairly easy.
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I have made up 3 diferent lengths of additional exhaust pipe that I can just clamp on with my welding vise grips...flaired at one end they clamp on and are simi-air tight and the results show imediately
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I have the electric sparker working good now and the Propane supply works fairly good... the fan however is still weak but the PJ's shouldn't need the air to begin with , it just makes it easier.
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I've studied the Logan report at length now and I have come to the conclusion that a Combustion chamber connected to a slightly smaller exhaust pipe is the best set up....for thrust
...intake pipes are not needed from the looks of things and in the Logan report they gravitated to larger and larger exhaust pipes to attain the most thrust... the end results were strange... with the tailpipe/exhaust pipe being only .9 of an inch smaller in diam than the C.C. ! but the INTAKE Hole/stub.... usually drawn as about 1" long... was increased to half the diam of the C.C. ... a huge increase as well...
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taking these changes I can't help but wonder if a straight pipe with a 1/2 Diam intake stub out the side ... cut to slightly longer than the over all length... wouldn't work?
the slight reduction of the C.C. diam going into the tailpipe is the cause for the sonic wave... without that reduction in there it may not work... but there's only one way for me to tell and that is to build one! <Grin>
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... Backing up to my"Funny Looking" PJ. it looks like a Pea-can with a pipe welded to it on both ends and a spark plug in the middle.... one pipe being small and short ( the intake) the other being 2 times as large and about 5 times as long is the exhaust.
you can look right down through this PJ... its a hollow tube ! .... but it does indeed work !
... if I take that simple design and stretch it to the Logan Reports direction of Exhaust and intake changes... it should be just as good as their fancy 50+hp PJ at 300fps airspeed
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I want to try this on a smaller diameter than 6" however ... I have some 2.5" conduit/chain-link fence posts... that is my prime target.....
... if my suspicions are correct, this could be a very strong small PJ that is easy to make.
perhaps we shall see...<GRIN>
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"Mother always told me "Son the Imposable is only a little bit harder"...and You know ... She WAS RIGHT!"
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Bob
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« Reply #61 on: April 27, 2011, 01:45:24 am » |
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LOL re-reading what I just posted I realized that what I am describing is just a ram jet....
but I want it to Pulse as a pulse jet...a very distinct combustion stage
that should be achievable by just extending the exhaust pipe to the proper length
...
Bob....
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"Mother always told me "Son the Imposable is only a little bit harder"...and You know ... She WAS RIGHT!"
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Bob
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« Reply #62 on: April 29, 2011, 06:31:08 am » |
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Well, I took a old Ramjet that never worked and re-worked it to make a Combustion chamber for a PJ
and tried something new... I tried a Larger intake and larger exhaust pipes on it, I did this because according to the Logan report as the PJ's got better and better thrust the intake and exhaust sizes increased in comparison to the C.C. size... so I thought I'ed try it and see what happens.
... it came out looking like a "Straight Lockwood" and ran after abit of persuading...never ran real good but it did run.
I left the intake and exhaust pipes long so I could trim them to "Fit" the PJ.
the 1.25 or 1.5" intake and 2" exhaust seam very large for the 2.85" C.C.
the C.C. is 5" long so I cut the intake pipe to 5" (taking off about 1 1/4") and tried it again .. this time it fired up almost immediately ! ... and I'ed say it's about 2 times as loud as my other PJ's LOL.
I ran it for a few seconds but could not get it to throttle very well
... I then cut the exhaust to 8 times the C.C. length ...cutting it extra long to be sure I don't have to weld on a section on later ! ...
that however didn't seam to work as I couldn't get it to run again after that !...but that may well be because of the propane tank is almost empty!...ALREADY!
so I placed a extension pipe on the end of the exhaust and it took off running almost immediately again
.... seams this puppy needs to be very long!
the thrust seams very good.... the best yet out of all of my PJ's!....
... I tried to run the PJ on gasoline but couldn't get it to run... it would POP and flame but not run. but ONLY after it was pre heated by the propane... once the pj was Hot and switched to gasoline it tried very hard to work. more tinkering is needed to get that to work though .
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I have never seen a "Straight Lockwood" before but I opted for this shape so I could use it on a rotor tip.... where the intake is faced into the oncoming high velocity air so I could get the RAM-AIR effect and increased thrust as the blade spins up ...
I dunno if it will work or not but its sure fun to play with.... Noisy but Fun !
...
LOL
Bob....
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"Mother always told me "Son the Imposable is only a little bit harder"...and You know ... She WAS RIGHT!"
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Bob
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« Reply #63 on: April 30, 2011, 08:27:04 pm » |
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I got more propane... have it about half used up already ! 5 gal don't go very far on a big PJ !
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I added a loop back to the straight lockwood ... to make it a proper lockwood.... could Not get it to run at all...no matter what I did...
so I cut it back off and tried to get it to run as a straight lockwood again... I cut the intake and made 4 add on pieces of different sizes to see if I could get the intake the right size... couldn't get it to run on any of them...
I did the same to the exhaust side and the same problem... although the results were more promicing
when playing with the exhaust side ....
I read where the intake should be at ODD multables of the exhaust/C.C. combonation and I tried enough odd things to get it to run that if it was going to it should have !
... I think I will flair a long 2" piece of pipe and stick it on the PJ's tailpipe and then Play with the intake again and see if I can get it to run... its odd because I even tried putting it back the way I had it earlier ...where it ran... but now I can't get it to run at all...
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I was so impressed with the thrust coming off that PJ that for the first time I could see it turning a rotor.... it had enough thrust for that !.... now if I can only get it working again !
LOL
Bob......
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"Mother always told me "Son the Imposable is only a little bit harder"...and You know ... She WAS RIGHT!"
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Bob
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« Reply #64 on: May 13, 2011, 02:59:56 am » |
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I found a small tube, a chair leg from the 1950's steel and tapered to a point, so I cut it off and decided to make a small PJ out of it.... I calculated the size of the CC from the exhaust diam and came up with a 1" x 2" piece of tubing for the CC, I took some time and threaded a nut to fit the spark-plug I had... so it would thread into the nut properly ... and drilled a hole in the center of the 2" tube and welded the nut on it.
next I found 2 washers for the end plates of the CC and welded them on the CC... cleaned that up and then welded the "chair leg" tube to the CC as an exhaust pipe...leaving it as long as it came!
it is 1/2" at the cc and about 3/4" at the far end about 22" long.
I then took another of the chair legs and cut a 1/8" slice out if a 2.5" long piece so I could shrink its diameter down ( the intake needs to be smaller than the exhaust!) i re welded that and cleaned it up and then welded it to the CC.... and it was purdy much done.
... I played with that silly thing for hours today but could not get it to run ...not even breefly!
it would pop and act like it wanted to run but it never did take off.
even after I slipped on a long 1" pipe over the tail pipe (which I thought for sure would make it run easily) it never would take off... I then desided that it must be the intake that is the problem so I added a 1/2" piece of tubing that pressed on to the intake snout to act as a sort of cone and give it a bit more length.... it still wouldn't run !
... I am beginning to wonder if it will run (being so small) on propane at all.... i may have to use Accetiline on this little thing!
... it is cute though ! its about as long as my arm and has potential of being a Night time PJ.... one that is small enough to not make too much noise at night! LOL
...
this little guy would make a dandy spinning arm test engine because of its small size I can use a quart bottle and valve to power it, and have the bottle on the arm spinning with it!
....I'm interested to see if a PJ can spin a rotor fast enough to obtain flight... and this might be a good one to start with being its so tiny ! LOL
...
All I gott'a do is get it to RUN ! HAHAHAHHAHAH!
...
Bob.....
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"Mother always told me "Son the Imposable is only a little bit harder"...and You know ... She WAS RIGHT!"
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Bob
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« Reply #65 on: May 25, 2011, 08:22:29 pm » |
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ok...
I built a big PJ....
its 6 3/4" Diam by 13" long in the Combustion chamber
has a 3" exhaust pipe well over 7ft long ....(havn't measured it yet)
the intake is 1 3/4" diam and aprox 8~10" long.
... when this baby pops its like a CANNON going off ! it leaves your ears ringing! HEHEHEH
.... starting is super easy however and all that is needed is to get it burning inside and getting it to "RUMBLE" then slowly increase the throttle... its operating frequancy is probably around 80 hz very LOW
it lets out a rather loud GROWL that will grow to an even Lowder growl ! when throttle is given.
... however I could not "rich extuinguish " it at all , infact I get the feeling it was only just above an idle
when I had it going for a few minutes....
thrust is not as strong as I had hoped... but its too big to use on anything anyway ! LOL
if you can imagin mutable shot guns going off trying to get it warmed up, when it finally takes off running it is far quietier than it was popping! <GRIN>
....
...
the GROWL of this thing running sounds so neet its unreal, the combonation of the Hiss of the propane going into the intake at a hellasious rate and the shaking of the earth is quite something to see!
... I was going to run it again and get a red hot picture of it for ya but I only have 1/2 a 5 gal propane tank left....figured I needed it for more experiments!
...(just running it long enough to get it red hot would probably take the rest of my fuel !)
...
for all intents and purposes its a "ROUGH Lockwood" of 6 3/4" in diam for the CC with a non-conical exhaust
I expected about 50 to 80 lbs. of thrust but so far its only about 10~20 lbs of Static thrust.
...
it probably weighs 35 to 40 lbs. and is "over built" with 1/16" steel and 3/16" plate to cap the end of the old air tank I used as a Combustion chamber.... the heavy 3" tubing I used for the exhaust is from old waterheaters
the center flue on gas units, I picked them up when I worked at Hoyte water-heater co. in Reno,Nv. they were throwing them away ! I got 2 pickup trucks of steel from them ! HAHAHAHAHA!
....
this is WHY I am trying so hard to make a small PJ that runs strong, rather than a BIG one....because its just TOOOOOOO BIG !
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One thing for sure , the larger the PJ the easier it is to start them... they seam to like being LARGE !
....
I had the exhaust SHORT at first to the seam just before the bend in the pipe, it would not run on that...
I made the bend and used another almost 4ft pipe to extend the pipe out in front of the intake.
it started easy then and its sound was much subdued compaired to what it was with the short pipe
I doubt I could have stood for the noise had it started with the Short Pipe! LOL
with the pipe longer though its really not so bad.... but I did have cotton stuffed in my ears real tight so I'm not sure how accurate that assessment is .<GRIN>
....
Great Sport at any rate ! LOL
...
Bob......
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"Mother always told me "Son the Imposable is only a little bit harder"...and You know ... She WAS RIGHT!"
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randy
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« Reply #66 on: May 26, 2011, 02:57:53 am » |
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Put some wheels on that large tank in the background, mount up all your pulse jets and see how fast you can get er goin. hahahaha Just don't hit anything.
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Bob
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« Reply #67 on: May 26, 2011, 05:55:05 am » |
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thats the propane tank fer the house Randy I can't snag that.... but I do have a 250 gal tank up the road a bit by the quanset hut .... but I am thinking of making a submarine out of it !
HAHAHAHAHAHA
...
Bob...
oh... you may have noticed the site being down for a day or so.... Pair network did some changing and told us about it.... our fault for not fixing it right off OOOPS !
.... (didn't know we had to however)
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"Mother always told me "Son the Imposable is only a little bit harder"...and You know ... She WAS RIGHT!"
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Bob
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« Reply #68 on: May 28, 2011, 02:37:18 am » |
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I changed a few things on the big PJ... I cut the end of the exhaust pipe off level with the intake...
that means I cut off about 5" of the 3" pipe.
I also added 2 steel supports to that long exhaust pipe.... it was really RINGing.... so I added the supports to stiffen it up to quiet it down some... and that worked quite well...quieted it down a huge amount.... well when it was Running... the bangs and pops still have my ears ringing!
....
however shortening the exhaust by 5" made it harder to start... it didn't want to burn inside...just pop or should I say KABOOM ! really loud booms but would not burn like it usually did... I finally got it to run after about 15 minutes of BOOMS and pows by getting it to where it poped in succession and then quickly increasing the fuel and it jumped into Resonance and started shaking the ground!
its low ROAR is quite something !
I thought I'd make a fan to set behind the exhaust of this beast to spin and see how fast it makes it go.... if I had a 120:1 gear box it might be useful as a turbine powered winch or something LOL
...
its just something to play with, but I'd like it to be USEFUL ! HAHAHAH
...
If I've learned one thing about PJ's in general it is this ... they like to be HOT to run so getting them Hot at the start is almost a prerequisite to getting them to run.
...
the air blower I use is not very strong at all and is mainly used to get the fuel air flowing through the Pulse jet.... once any of them are running you can remove the sparker and the air blower and they will continue to run just fine.
...
I find it extremely interesting that this big PJ uses less fuel than the other 3" ones I've made
I think mainly that is because I am running it very slow... it idles very low and that is not like most of the others with their higher frequency... this thing cycles at 50 to 80 Hz ...I'm guessing but its very LOW in frequency unlike most of the others which are in the hundreds or more HZ
...another reason for this "running it SLOW" is that my 1/4" line feeding the PJ is just that ...a 1/4" copper tubing line... this PJ could probably run on 3/8" or even 1/2" fuel feed line before it would "Rich Extinguish" ...
...
By the way... Rich Extinguish, is just a method the PJ experimenters use to determine weather the engine has enough fuel or not.... if you cannot turn up the valve far enough to "Rich extinguish" the engine while its running (which mean the engine will suddenly quit running) then your probably not
getting out all the thrust you can get out of it, because your not giving it enough fuel....
so its obvious that I'm not giving this big PJ much fuel , in fact its kind of amazing that it runs on what little I do give it ! LOL !!!!!
...
Bob...
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"Mother always told me "Son the Imposable is only a little bit harder"...and You know ... She WAS RIGHT!"
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Manta
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« Reply #69 on: May 28, 2011, 04:49:55 am » |
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Just out of curiosity, what are you going to use this monster for ?
Or is it to prove the saying ' how do you become a milionaire ? Start out as a multimilionaire and buy fuel for the pulse jet.'
Just looking at the top picture, is that Mercedes in the background still a runner ?
Dave
(Manta)
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Good questions have a sting in the tail.
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Bob
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« Reply #70 on: June 20, 2011, 05:02:30 pm » |
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Hi Manta !
Yah the Mercadies still runs its a 240 Diesel but the transmition has problems it likes to lock up in 2nd geer and you can't get it into any other gear no matter what...I've got it un stuck 3 times now but it gets stuck when ever it wants to so it sits till I can repair it !
HAHAHHA its my sisters car gets 45~48mpg at last check but she's scared to drive it now with the tranney acting up.
...
as far as the PJ's go.... well their fun to play with... but that's about all!
I was thinking of using 2 smaller ones on the rotor tip of my helicopter instead of using the Rotex 447... but I don't think I can get enough thrust out of them so they will more than likely just hang on the wall as sculptures! LOL!
....
Bob....
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"Mother always told me "Son the Imposable is only a little bit harder"...and You know ... She WAS RIGHT!"
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