Search found 889 matches

by tufty
Fri Feb 12, 2016 8:56 pm
Forum: Valveless pulsejet forum
Topic: Lockwood-H pulsejet with variations will it work?
Replies: 22
Views: 23045

Re: Lockwood-H pulsejet with variations will it work?

https://www.youtube.com/watch?v=S57D4J8ResU i've presented it at my school (it was for a school project) so i was able to run it for a longer time, it ran pretty good till my tank froze over and it flamed out. Cool! That said, I would me much happier if you'd been wearing ear defenders. A pair of d...
by tufty
Sun Feb 07, 2016 8:22 am
Forum: Gas turbine forum
Topic: 3D-printed jet engine, sort of...
Replies: 5
Views: 11364

Re: 3D-printed jet engine, sort of...

That's pretty awesome. And there was me thinking 3d printing was useless :)
by tufty
Sun Feb 07, 2016 8:17 am
Forum: Valveless pulsejet forum
Topic: Lockwood-H pulsejet with variations will it work?
Replies: 22
Views: 23045

Re: Lockwood-H pulsejet with variations will it work?

Nice one!

Lockwood-Hiller, AKA "Police Trumpet"
by tufty
Mon Jan 11, 2016 4:55 pm
Forum: Pressure jet forum
Topic: Heads up re Glue 130R
Replies: 2
Views: 5823

Re: Heads up re Glue 130R

Got any video? I like me a Gluey, I do.
by tufty
Sun Jan 03, 2016 4:52 pm
Forum: Valveless pulsejet forum
Topic: More free plans: 40 pound Chinese
Replies: 192
Views: 824667

Re: More free plans: 40 pound Chinese

Niiiiice.

Happy new year.
by tufty
Mon Oct 05, 2015 5:21 am
Forum: Valved pulsejet forum
Topic: Pressure gain combustor (for real!)
Replies: 7
Views: 11044

Re: Pressure gain combustor (for real!)

That's extremely cool, Paulo.

I'm sure we'd all be interested in more details. Have you instrumented your combustor?
by tufty
Tue Jul 14, 2015 7:04 am
Forum: Off topic forum
Topic: Nature's Children
Replies: 700
Views: 362925

Re: Nature's Children

Haha that's ace! Where on earth do you dig these things up from, Mark?
by tufty
Thu Feb 12, 2015 12:18 pm
Forum: Valved pulsejet forum
Topic: Dyna-Jet story
Replies: 41
Views: 45870

Re: Dyna-Jet story

Aaaargh! I would strongly suggest finding someone local who has some Linux experience, and getting them to image the old computer's hard disk and your usb key, in read only mode, using ddrescue *before* letting anyone else play with them. In fact, don't ever let anyone play with the original media u...
by tufty
Wed Feb 04, 2015 3:57 pm
Forum: Tools and Construction
Topic: This made me laugh...
Replies: 1
Views: 4400

This made me laugh...

… but may even be useful.

That maniac Furze hydroforming (and then running to destruction) a lockwood-ish thing. Using a pressure washer.

https://www.youtube.com/watch?v=bCsg5pQimWI
by tufty
Wed Feb 04, 2015 3:48 pm
Forum: Valved pulsejet forum
Topic: Identifying my engines
Replies: 6
Views: 9883

Re: Identifying my engines

by tufty
Fri Dec 19, 2014 12:09 pm
Forum: Rocket forum
Topic: 120 lbs thrust rocket engine went 3.5 miles
Replies: 6
Views: 13499

Re: 120 lbs thrust rocket engine went 3.5 miles

Yes Potassium permagnate is interesting stuff too. Potassium permagnate and glycerine ignites above 70 degrees. Potassium permagnate and sugar ignites if it get wet above 70 degrees. Potassium permagnate and hydrogen peroxide makes some extremely powerful rockets. The German WWII ME262 was powered ...
by tufty
Mon Dec 01, 2014 7:03 am
Forum: Valveless pulsejet forum
Topic: Wanted: plans for a 10-20Lb valveless PJ
Replies: 16
Views: 21650

Re: Wanted: plans for a 10-20Lb valveless PJ

I tried searching for Hinote Criteria on the forums, but while it was mentioned repeatedly, it was never really explained. Google search (see below) gives this thread as the first hit : http://www.pulse-jets.com/phpbb3/viewtopic.php?f=3&t=894 including This is extremely interesting stuff, because i...
by tufty
Sun Nov 30, 2014 8:03 am
Forum: Valveless pulsejet forum
Topic: Wanted: plans for a 10-20Lb valveless PJ
Replies: 16
Views: 21650

Re: Wanted: plans for a 10-20Lb valveless PJ

If you scale the escopette, it becomes something else, and any ideas of the original being easy to start, running consistently, producing x thrust, running at y Hz, etc, go straight out of the window. Frequency is determined by the length of the engine and the speed of sound at running temperature. ...
by tufty
Sat Nov 29, 2014 9:52 pm
Forum: Valveless pulsejet forum
Topic: Wanted: plans for a 10-20Lb valveless PJ
Replies: 16
Views: 21650

Re: Wanted: plans for a 10-20Lb valveless PJ

scaling, especially downwards, is generally a bad idea.

here's another set of escopette dimensions

Image
by tufty
Fri Nov 28, 2014 5:24 pm
Forum: Valveless pulsejet forum
Topic: Wanted: plans for a 10-20Lb valveless PJ
Replies: 16
Views: 21650

Re: Wanted: plans for a 10-20Lb valveless PJ

You want a straight valveless? Escopette / Escopeta http://www.pulse-jets.com/phpbb3/viewtopic.php?f=3&t=627 Thanks, I actually tried looking for some Escopette stuff, and couldn't find much about it except that it was a successful engine, not much information about thrust, efficiency or maximum op...