Search found 83 matches

by Stuart
Thu Dec 02, 2004 5:32 am
Forum: Valveless pulsejet forum
Topic: Anyone identify this valveless Pulse Jet?
Replies: 16
Views: 7604

Re: Anyone identify this valveless Pulse Jet?

"I dismantled it and gave the pulse jet engine to Bob Lazar. " This is the line that probably passed you guys by. Bob Lazar is the famous/infamous nut genius who claimed to have seen Aliens and their spaceships at Area 51 here in Nevada. I know about him in part because I worked for a signage compan...
by Stuart
Wed Nov 10, 2004 4:54 pm
Forum: Valveless pulsejet forum
Topic: Liquid Fuel Follies of '04, starring the Short Lady
Replies: 22
Views: 5396

Re: Liquid Fuel Follies of '04, starring the Short Lady

Interesting about how well your venturi works. I am just getting ready to try some liquid fuel (pressurized out of a weed sprayer), but I think carburetion would be better. What I'm beginning to think is that there is no reason these systems shouldn't be duel propane/liquid fuel systems. You use the...
by Stuart
Mon Nov 08, 2004 5:40 pm
Forum: Valveless pulsejet forum
Topic: Interesting valveless patent
Replies: 6
Views: 1869

Re: Interesting valveless patent

Looks to me like the design is trying to both act as some compacitance and also an augmenter. Most of you guys are old enough to remember the first designs of commercial jet engines. Remember the scalloped exhausts? What they were trying to do was use the scallops to enhance the mixing of the exhaus...
by Stuart
Thu Oct 21, 2004 1:15 am
Forum: Valveless pulsejet forum
Topic: SNECMA CD image scans posted
Replies: 16
Views: 6428

Re: SNECMA CD image scans posted

Holy Mama, thank you so much. I think I made myself sick just contemplating how many hours it will take me to digest all this matrial.
by Stuart
Sat Oct 16, 2004 11:16 pm
Forum: Valveless pulsejet forum
Topic: What not to do!
Replies: 14
Views: 4444

Re: What not to do!

I have a design that is loosely a pressure jet. I tried starting it by pooling some gas in the bottom of it, but got an unexpected fireball out the intake that singed my eyebrows. Didn't work on it again until I learned about this forum a few years ago and got smart enough to try propane. Still get ...
by Stuart
Fri Oct 08, 2004 4:34 am
Forum: Valveless pulsejet forum
Topic: M1E Preview
Replies: 49
Views: 19719

Re: M1E Preview

What I need to do for you guys is get you the isentropic flow tables that are based on area ratios, Mach number etc. I haven't seen a set of charts on the net so far, and they would be a bitch to type in from my fluid dynamic textbooks. I have a bunch of splines I programmed to generate these charts...
by Stuart
Thu Oct 07, 2004 9:20 pm
Forum: Valveless pulsejet forum
Topic: M1E Preview
Replies: 49
Views: 19719

Re: M1E Preview

Hate to be a negative Nelly, but you shouldn't normally be seeing Mach numbers greater than 1 in a flow unless you've got a converging/diverging nozzle to pop the flow over the brink. That makes me verrry suspicious of your numbers (not that they aren't useful in general, but as you hit Mach 1 thing...
by Stuart
Thu Oct 07, 2004 6:03 pm
Forum: Valveless pulsejet forum
Topic: M1E Preview
Replies: 49
Views: 19719

Re: M1E Preview

Hey Graham: Do you think some of these (L-H type) engines are approaching M=!.0 in the intake? (I'm assuming outflow) This would certainly raise new questions/parameters to consider in the equation, --don't you agree? Bill H. Acoustic Propulsion Concepts ".......some day soon we'll be flying airpla...
by Stuart
Sun Oct 03, 2004 3:20 pm
Forum: Valveless pulsejet forum
Topic: M1E Preview
Replies: 49
Views: 19719

Re: M1E Preview

Why did you move away from the flat plate entry to the combustion chamber? Graham: Thanks for your suggestions. The flat front plate appeared (in Uflow) to be more effective, giving a sharper cutoff for the intake gases (turbulence) and possible aiding in rectification at the intake. But it's more ...
by Stuart
Sun Oct 03, 2004 3:06 pm
Forum: Ramjet forum
Topic: Rocket/Ramjet?
Replies: 3
Views: 2747

Re: Rocket/Ramjet?

Bruno is right, BUT a ram-rocket, or rocket-ram, or a motor jet, would all be interesting.
by Stuart
Fri Oct 01, 2004 6:32 pm
Forum: Off topic forum
Topic: Bruce's at it again
Replies: 9
Views: 3228

Re: Bruce's at it again

"I have been forced to move from the modern 2,500 sq ft house (2 bathrooms, six bedrooms) I used to own, to a series of old and run-down rented houses, finally leading me to the current rat and flea-infested dwelling I'm in now. " Why am I not surprised. Bruce "Icarus" Simpson. If you act like a nut...
by Stuart
Wed Sep 29, 2004 3:36 pm
Forum: Valved pulsejet forum
Topic: helo ... i've build my pulse...
Replies: 8
Views: 3210

Re: helo ... i've build my pulse...

Maina, perhaps you can tell the other stupid rocket boys here what the springs are for? Vibration?
by Stuart
Fri Sep 24, 2004 7:48 pm
Forum: Off topic forum
Topic: Trapped Vortex Combustion (TVC)
Replies: 6
Views: 2332

Re: Trapped Vortex Combustion (TVC)

Thanks, this is usefull to me, but I am doing more of a ramjet/pressurejet. Someone was doing a ring injector in the valveless pulsejets, it looked like the same kind of thing. But, of course, placement changes everything, so you would have to set up a vortex generator specific to every design.
by Stuart
Wed Sep 22, 2004 5:31 am
Forum: Valveless pulsejet forum
Topic: PDE-engine-video
Replies: 2
Views: 2106

Re: PDE-engine-video

Wow, thanks. Thats in part Scaled Composites work, I need to go visit them.
by Stuart
Tue Sep 14, 2004 2:11 pm
Forum: Ramjet forum
Topic: ramjet plans
Replies: 25
Views: 25473

Re: ramjet plans

I am mostly doing ram jet stuff, so yes, anything you have would be very useful. I especially need to know how ramjets kick over from subsonic to sonic.