Search found 81 matches

by Jmitchell
Sun May 15, 2005 12:47 am
Forum: Valveless pulsejet forum
Topic: Best valvesless to build for thrust?
Replies: 3
Views: 1399

Best valvesless to build for thrust?

I want to make a powerful valveless for a kart but I'm not sure if I should go for a large FWE or a large lockwood, or what?
by Jmitchell
Fri May 13, 2005 10:56 pm
Forum: How to improve this site
Topic: Remove Bruce Simpsons link from the links page
Replies: 32
Views: 15454

re: Remove Bruce Simpsons link from the links page

Really, that's something I heard on a french movie, I never really looked up the true definition, thanks for clarifying it :).

I think the movie was les visitors or something.
by Jmitchell
Fri May 13, 2005 8:02 pm
Forum: How to improve this site
Topic: Remove Bruce Simpsons link from the links page
Replies: 32
Views: 15454

re: Remove Bruce Simpsons link from the links page

In french, I call you a PUTAIN DE MERDE.

For god's sake, this is a forum about JET ENGINES! Grow up! Discuss jet engines, not petty problems about links!
by Jmitchell
Fri May 13, 2005 10:36 am
Forum: Off topic forum
Topic: Pulse jet noise dB?
Replies: 1
Views: 1331

Pulse jet noise dB?

Approximately how loud is a medium sized pulse jet in dB? I didn't notice how loud they were until I got mine running.

I can feel my earmuffs shaking when it runs lol.
by Jmitchell
Fri May 13, 2005 1:36 am
Forum: Valveless pulsejet forum
Topic: Valveless idea, (it probably won't work)
Replies: 7
Views: 2326

Valveless idea, (it probably won't work)

I was just brainstorming and came up with this shape.
It probably won't work, but I tried mapping out the fuel/air travel and I think it might have a potential?
by Jmitchell
Wed May 11, 2005 8:05 pm
Forum: Valveless pulsejet forum
Topic: Pipewood help
Replies: 36
Views: 15990

re: Pipewood help

Is there an easy way to measure thrust without a sled etc..? Can I just stick a flat piece of something on a scale and hold it infront of the engine? I wonder if it would run on gasoline? Is there a way I can install my fuel supply into the side of the engine so I don't have to have the ghetto coppe...
by Jmitchell
Wed May 11, 2005 4:50 pm
Forum: Valveless pulsejet forum
Topic: Pipewood help
Replies: 36
Views: 15990

re: Pipewood help

So if I extend the exhaust and add a flare with a ground up reducer, and do the same to the intake, it won't flame out at such a low fuel flow?

How about augmentors, anyone ever thought of that?

I can hold my hand 12" infront of the exhaust and it doesn't hurt.
by Jmitchell
Wed May 11, 2005 2:02 am
Forum: Valveless pulsejet forum
Topic: Pipewood help
Replies: 36
Views: 15990

re: Pipewood help

Here's the layout of how I built mine, credited to Mike of course!
by Jmitchell
Tue May 10, 2005 11:47 pm
Forum: Valveless pulsejet forum
Topic: Pipewood help
Replies: 36
Views: 15990

re: Pipewood help

Yes! it ended up being around 40$ because the "trainee" at the counter was stupid and rang up a few things more than once...

Now I need to build a REAL engine! Maybe I can use steel car exhaust tubing??

Thanks for your help Steve, you hit the nail on the head!
by Jmitchell
Tue May 10, 2005 11:31 pm
Forum: Valveless pulsejet forum
Topic: Pipewood help
Replies: 36
Views: 15990

re: Pipewood help

IT WORKS!!!! weeee!!! I hooked up the 20 gal tank and bent the stinger a bit, (1/4" copper) and VOILA! It starts SO easy, one puff of air and it's buzzing. It's throttleable, but when I turn the gas up a little bit beyond the safe point, it flames out, same with too low. Here are some pictures, I ha...
by Jmitchell
Tue May 10, 2005 1:53 am
Forum: Valveless pulsejet forum
Topic: Pipewood help
Replies: 36
Views: 15990

re: Pipewood help

OK! I'll try that tomorrow and see if I can't get it to self sustain. Too bad it's too heavy for any sort of propulsion. Anyone got any ideas on the thrust figures?
by Jmitchell
Tue May 10, 2005 1:31 am
Forum: Valveless pulsejet forum
Topic: Pipewood help
Replies: 36
Views: 15990

re: Pipewood help

Yes my propane tank is both half full and cold! OK, it's time to get out the 20 gallon tank, big propane tanks scare me hehe. I found a fitting from an old grill, it's got a regulator, should I fk with the regulator to make it output more, or just cut it off and hook my hose right onto the barb befo...
by Jmitchell
Mon May 09, 2005 9:34 pm
Forum: Valveless pulsejet forum
Topic: Pipewood help
Replies: 36
Views: 15990

re: Pipewood help

Still doesn't run :( I squashed the stinger a bit, didn't change much. I'm just randomly guessing the position and putting it about half way inside the CC, is that wrong? I don't know what I'm doing wrong! I turn the spark on, apply air and slowly turn on fuel. I get a GRRRRRRR gargling sound and I ...
by Jmitchell
Mon May 09, 2005 8:48 am
Forum: Valveless pulsejet forum
Topic: Pipewood help
Replies: 36
Views: 15990

re: Pipewood help

Hi Mike About the filing, I was going to do that on my lathe, but I didn't want to squash the threads in the chuck as they were already hard to screw in to the other pieces. I used a gigantic pipe wrench to screw those all together, It almost ripped my vise off my bench when I was torquing them down...