Search found 9 matches

by attache'
Thu Mar 02, 2006 11:05 pm
Forum: Valveless pulsejet forum
Topic: threaded SCH 40 Pipe Pulsejet
Replies: 8
Views: 4151

re: threaded SCH 40 Pipe Pulsejet

True. Organ tuners becoming rocket scientists, interesting. I am on the board of directors for a theator organ society. Never saw the parallel. Thanks
by attache'
Wed Mar 01, 2006 9:01 pm
Forum: Valveless pulsejet forum
Topic: threaded SCH 40 Pipe Pulsejet
Replies: 8
Views: 4151

re: threaded SCH 40 Pipe Pulsejet

I'm curious. Pulsejets seem to always be discussed in leignth (maintaining the ratios); Why not volume? We are expanding gas in 3 dimensions. second, how have these ratios come about: mathmatical/trial and error? I have always use trial and error.
by attache'
Wed Mar 01, 2006 3:47 am
Forum: Valveless pulsejet forum
Topic: threaded SCH 40 Pipe Pulsejet
Replies: 8
Views: 4151

Re: re: threaded SCH 40 Pipe Pulsejet

Your fueling rig may be taking up too much of the volume of the chamber or area of the intake. Not to scale 1/8 inch after a reducer. .19 out of .63 area (2-d) taken up, also I have the intake the same size as the tail pipe. solved the problem of me finding a reducer 2 to 3/4. Plus the chamber leng...
by attache'
Wed Mar 01, 2006 12:23 am
Forum: Valveless pulsejet forum
Topic: threaded SCH 40 Pipe Pulsejet
Replies: 8
Views: 4151

re: threaded SCH 40 Pipe Pulsejet

Even after correcting the chamber size, i couldn't get it to work, but i put in a fuel injector using brakeline fittings threaded through the chamber to use propane. Normal USA propane valves, after the regulator, thread in to the brake line perfectly.
Not to scale...
by attache'
Wed Mar 01, 2006 12:03 am
Forum: Valveless pulsejet forum
Topic: start without spark :D
Replies: 10
Views: 3301

re: start without spark :D

Propane torch at the end of the tailpipe. I like using the torch because it doesn't go out easily.
by attache'
Tue Feb 28, 2006 12:50 am
Forum: Valveless pulsejet forum
Topic: threaded SCH 40 Pipe Pulsejet
Replies: 8
Views: 4151

re: threaded SCH 40 Pipe Pulsejet

How are you suppling the fuel, and what are using to start it (spark/flame, compressed air/vacuum)? ... i got one of these running a few months ago for high school senior research. I'll try to upload some pics by saturday the 5th
by attache'
Tue Nov 15, 2005 5:10 pm
Forum: Valveless pulsejet forum
Topic: No-weld pipe fitting valveless
Replies: 100
Views: 65342

re: No-weld pipe fitting valveless

Done building it and it needs constaint air to run. Using prop/map. I show pictures soon. Thinking...
by attache'
Mon Oct 03, 2005 2:53 am
Forum: Valveless pulsejet forum
Topic: No-weld pipe fitting valveless
Replies: 100
Views: 65342

re: No-weld pipe fitting valveless

It's to late to edit my previous post, sry.
I used the fuel setup on page two, but when trying to start it all i got was a low rumble (about 4 a second), no thrust at all. Plus the metal, no red. What went wrong?
by attache'
Fri Sep 30, 2005 2:22 am
Forum: Valveless pulsejet forum
Topic: No-weld pipe fitting valveless
Replies: 100
Views: 65342

re: No-weld pipe fitting valveless

Fuel injected propane? I know how to do it on valved designs, but just looking for some pre-ideas. For all of the plumbing to make the ugly stick: $20 at a local small plumbing store.(this includes the brake line and other feul parts. Ha Ha! It runs fresh outta the box! Looking at the attached pictu...