Search found 86 matches

by James D
Sat Aug 28, 2010 8:53 pm
Forum: Valveless pulsejet forum
Topic: Nord 1500 Griffon Project
Replies: 126
Views: 50191

Re: Nord 1500 Griffon Project

Enthusiasm is a fragile commodity and easily crushed.

It's such a shame that this forum is effectively dead now, especially as it was allowed to happen.
by James D
Sun Jun 13, 2010 11:06 am
Forum: Valveless pulsejet forum
Topic: What happened here!?!?!
Replies: 13
Views: 2008

Re: What happened here!?!?!

Shhhhhhh....
by James D
Wed May 26, 2010 8:08 pm
Forum: Valveless pulsejet forum
Topic: Senior Project FWEVIII Rev 8
Replies: 16
Views: 3331

Re: Senior Project FWEVIII Rev 8

Hi, I’ve attached some photos of the fuel pipes I used; they were about 1/8” OD. I just flattened the ends completely, ground the corners at an angle and drilled four 1mm holes in the end. The position of the sparkplug makes getting the initial ignition tricky, as you noted, but assuming you can liv...
by James D
Sun Dec 14, 2008 9:39 pm
Forum: Valveless pulsejet forum
Topic: Combustion window
Replies: 16
Views: 2009

Re: Combustion window

It's hard to see what really going on in there sadly, but hopefully it will inspire someone to do better. I might try again but using smoke to help visualise the intake flow, I'll see if I can come up with a way of producing thick white smoke, or maybe water injected into the intake would be visible...
by James D
Sun Dec 14, 2008 8:38 pm
Forum: Valveless pulsejet forum
Topic: Combustion window
Replies: 16
Views: 2009

Re: Combustion window

And this is a link to download the full video, if anyone wants it. The gasket consumes itself and leaks gradually more and more as the video goes on, so bear that in mind... http://www.mediafire.com/download.php?m2on5t2znyq Its a 43mb .mov file and you might need a fairly recent version of apples (f...
by James D
Sun Dec 14, 2008 8:32 pm
Forum: Valveless pulsejet forum
Topic: Combustion window
Replies: 16
Views: 2009

Re: Combustion window

This is the Lab watch glass used, I wasn't expecting it to last more than a few seconds but it was the leather gasket that gave up first.
by James D
Sun Dec 14, 2008 8:27 pm
Forum: Valveless pulsejet forum
Topic: Combustion window
Replies: 16
Views: 2009

Re: Combustion window

A picture of the general layout.
by James D
Sun Dec 14, 2008 8:25 pm
Forum: Valveless pulsejet forum
Topic: Combustion window
Replies: 16
Views: 2009

Re: Combustion window

And this is played at 3 frames/second
by James D
Sun Dec 14, 2008 8:21 pm
Forum: Valveless pulsejet forum
Topic: Combustion window
Replies: 16
Views: 2009

Combustion window

A little while ago I modified an FWE by removing the end plate from the combustion chamber and bolting on a glass window. I recorded a run using a Casio Exilim EX-F1 at a frame rate of 1200 per second, this only gives between 4 and 5 frames per cycle! which isn't enough for smooth playback unfortuna...
by James D
Fri Dec 05, 2008 3:41 pm
Forum: Valveless pulsejet forum
Topic: See through jet
Replies: 53
Views: 5231

Re: See through jet

I've got a Casio EX-F1, it's pretty good. It has limitations of course, especially regarding resolution but there aren't many 1200 fps cameras that are so small and easy to use. http://www.exilim.co.uk/exf1/ I recorded some high speed video of an FWE with a glass end plate on the combustion chamber ...
by James D
Fri Jul 25, 2008 6:58 pm
Forum: Valveless pulsejet forum
Topic: Lady Anne variation.
Replies: 172
Views: 36311

Re: Lady Anne variation.

I've converted this video file to wmv, it has lost a bit of quality in the process.
by James D
Fri Jul 06, 2007 10:42 pm
Forum: Valveless pulsejet forum
Topic: Lady Anne Boleyn Rev07 Full Size Plan Drawings
Replies: 53
Views: 17044

Lady Anne

Good work Larry & Ed, I'm really looking forward to seeing these run, and I'm sure they will run, the last Lady Anne I put together had a single 26mm intake so it will be good to see how the performance compares. I only ran mine briefly but I did get an idea of thrust and it'll be interesting to see...
by James D
Sun Mar 18, 2007 2:39 pm
Forum: Valveless pulsejet forum
Topic: 42Labs/Cotrill FWE Hyperpulse MK I
Replies: 35
Views: 14686

Excellent work James, I look forward to seeing your future developments.
by James D
Sun Mar 18, 2007 2:32 pm
Forum: Valveless pulsejet forum
Topic: Twin-Stack 32-incher: 'Lady Jane Grey'
Replies: 146
Views: 44140

Chunky Lady.

Good work Vern, that thing sounds nasty, I felt sure you'd have to add some length to the intakes but it seems to work great.

I can't get over how fat that thing is;) if it makes good thrust it could become a popular build.

James D
by James D
Sun Mar 18, 2007 2:17 pm
Forum: Valveless pulsejet forum
Topic: Lady Anne variation.
Replies: 172
Views: 36311

Hey this is awesome, im definately going to have to build this from clay. The dimensions you posted where a little vague to me, can i get some with all the dimensions, so i know exactly what im doing?, that will be much appreciated! Hi Craig, I was following your Ceramic Lady thread with great inte...