Search found 14 matches

by pgup
Fri Aug 24, 2007 4:42 pm
Forum: Valveless pulsejet forum
Topic: M. and Mike's new experimental motor
Replies: 27
Views: 9790

one inlet versus four

JAC Kentfield (and his graduate student) discovered the same thing circa 1989. Conversion of a single inlet motor to four inlets resulted in an approximately 40% reduction in thrust. The project did meet the objective of allowing them to shorten the motor, but was a total disappointment from thrust ...
by pgup
Mon Aug 06, 2007 10:46 pm
Forum: How to improve this site
Topic: Time to bury the hatchet?
Replies: 9
Views: 6044

Mark, We're not talking about the same individual(s). You had me confused at first, and it took me a while to figure out who you were referring to, but after reading the relevant posts, I agree with you. I think Anders was referring to other individuals as well, but I can't be sure. Rather than carr...
by pgup
Fri Aug 03, 2007 4:29 pm
Forum: How to improve this site
Topic: Time to bury the hatchet?
Replies: 9
Views: 6044

Rusted Hatchet

One or more individuals who have left the forum have progressed far beyond anything that could be gained here. Why would they come back for more abuse?
by pgup
Wed Aug 01, 2007 10:57 pm
Forum: Jet Vehicles, All Types
Topic: F86-HPX-Sabre, By Rossco & IrvineJ
Replies: 62
Views: 701467

Anders Troberg wrote:(I got that link a long time ago from the banned ex-member that we prefer to not talk about).
Which banned ex-member? There've been several over the years...
by pgup
Thu Jul 26, 2007 1:59 pm
Forum: Valveless pulsejet forum
Topic: Schedule 40 6" Test
Replies: 34
Views: 14779

Schedule 40 6" test

Before you put that engine away for good, you should put it on some wheels and attach a 300-lb spring scale to it and measure the thrust. It's easy to make a lot of heat and noise and hot blasts of air, but it's another matter entirely to make a significant amount of thrust. (And even more so from t...
by pgup
Mon Jul 23, 2007 1:27 pm
Forum: Valveless pulsejet forum
Topic: Schedule 40 6" Test
Replies: 34
Views: 14779

Re: Same stuff????

Vermin wrote:Is it possible that this is reminisant of this? or somewhat similar? although bigger.....Just asking.
hey Vern what was the total thrust of that engine?
by pgup
Fri Jul 06, 2007 5:41 pm
Forum: Valveless pulsejet forum
Topic: Lady Anne Boleyn Rev07 Full Size Plan Drawings
Replies: 53
Views: 24375

Re: Lady anne

The reason being its got the best chance of working straight off the bat, I know this because of the the amount of time I spent on these engines. Then have you measured the thrust of your engine http://www.pulse-jets.com/phpbb2/viewtopic.php?t=4305&start=0&postdays=0&postorder=asc&highlight ? How m...
by pgup
Fri Jul 06, 2007 3:47 pm
Forum: Valved pulsejet forum
Topic: petal valves in dead end ?
Replies: 9
Views: 5908

Re: petal valves in dead end ?

... It is the mindsets which prevent progress, fear of contravening established customs which the small minds defend at any cost, coupled with poor resistance to brainwashing. Examine the attached image. ...This increases net intake area, improves filling and purging of the chamber and increases po...
by pgup
Tue Jun 12, 2007 7:35 pm
Forum: Valveless pulsejet forum
Topic: any body know cool things to do with a pulse jet?
Replies: 43
Views: 15913

Twin-pulsejet dragster with turbine whine

Cool twin-pulsejet dragster: http://www.youtube.com/watch?v=clOmc3WI5fk Too bad they mangled the audio with a phony turbine whine though...too much marketing BS... Anyway the video's fun to watch. Interesting to note how much flame is coming out of the motors, I doubt Bruce is going to do any braggi...
by pgup
Mon Jun 04, 2007 11:54 pm
Forum: Valveless pulsejet forum
Topic: Let's make valveless turbine bicycles!
Replies: 56
Views: 22455

How true! It's what you can learn from it that counts...you can build the "pretty one" later. You said your gage topped out at 130 MPH (~=191 FPS). I have found the following formula reasonably accurate for first approximation purposes, for measuring ambient temp airflows up to about 250 MPH: Airflo...
by pgup
Mon Jun 04, 2007 11:29 pm
Forum: Tools and Construction
Topic: I just calibrated my leaf-blower!
Replies: 4
Views: 3743

Re: I just calibrated my leaf-blower!

The readings were these: 25" 65mph 20" 80mph 15" 105mph 12" 130mph The indicator topped out at 140, so I couldn't get any closer to the nozzle, but expect that the curve will tell me where the higher speeds are. Can you tell us the pressure readings (in inches WC or mm Hg) from the pitot static gau...
by pgup
Mon Jun 04, 2007 11:20 pm
Forum: Valveless pulsejet forum
Topic: Let's make valveless turbine bicycles!
Replies: 56
Views: 22455

Hero's turbine

I just put some fuel through it as shown (not spinning!). ... I'm re-doing the hub. It's wimpy as it is. Got to spin this one up soon, even though I've re-designed it infinite times. I think at one time you said you were going to put a torque wrench on it...Even if you never actually spin it up (or...
by pgup
Sat Jun 02, 2007 12:29 am
Forum: Valveless pulsejet forum
Topic: Let's make valveless turbine bicycles!
Replies: 56
Views: 22455

Hero's turdine

What ever happened to the Hero's turbine of this thread?

Was it ever tested?

Did it ever work?
by pgup
Mon Nov 06, 2006 2:12 pm
Forum: How to improve this site
Topic: I have sold www.pulse-jets.com To Mike Everman
Replies: 23
Views: 15323

re: I have sold www.pulse-jets.com To Mike Everman

How much did it sell for? $2500 USD?

Wonder how much it gone for if Kenneth put it on ebay?