Search found 10 matches

by J.L. Frusha
Fri Oct 09, 2009 7:34 pm
Forum: Valveless pulsejet forum
Topic: "U" shaped valveless pulse-jet
Replies: 15
Views: 4042

Re: "U" shaped valveless pulse-jet

Didn't want to get ugly. I just don't like being told one thing, when a little research can point out where the pies in the pasture are. I have never welded, but have 3 people that will teach me. A son, a neighbor and a brother(order of proximity). I can look-up more bunk, than even I can believe. I...
by J.L. Frusha
Fri Oct 09, 2009 5:29 pm
Forum: Valveless pulsejet forum
Topic: "U" shaped valveless pulse-jet
Replies: 15
Views: 4042

Re: "U" shaped valveless pulse-jet

Yep. sure did! Intakes and fuel nozzles are sized for evenly supporting the triple-sized combustion chamber. In other words, they should each flow 50% more than would normally be required for a single inlet design.
by J.L. Frusha
Fri Oct 09, 2009 4:24 pm
Forum: Valveless pulsejet forum
Topic: "U" shaped valveless pulse-jet
Replies: 15
Views: 4042

Re: "U" shaped valveless pulse-jet

I've slept on it, my basic theory of operation was wrong. Both sides have to work in parallel to create one large pulse. When the 2 wave-fronts approach each other, inside the bend, the fuel/air mix between them becomes highly compressed and reaches self detonation. As for how many pieces are welded...
by J.L. Frusha
Thu Oct 08, 2009 4:02 pm
Forum: Valveless pulsejet forum
Topic: "U" shaped valveless pulse-jet
Replies: 15
Views: 4042

Re: "U" shaped valveless pulse-jet

One note: This is obviously intended to be a "Blast Compression" type pulse-jet (Deflagration to Detonation Transition). There are numerous other names to describe the combustion of this type engine, just compare the definitions. In theory, the expanding combustion gases of one side compresses the c...
by J.L. Frusha
Thu Oct 08, 2009 2:54 pm
Forum: Valveless pulsejet forum
Topic: "U" shaped valveless pulse-jet
Replies: 15
Views: 4042

Re: "U" shaped valveless pulse-jet

I thought these forums were intended to assist in the development of pulse-jets. This is obviously a pulse-jet. Somewhat different than others, however, it should function like any of the multi-inlet/single chamber pulse-jets. The main difference is going to be the way the combustion flows, compress...
by J.L. Frusha
Thu Oct 08, 2009 2:17 pm
Forum: Valveless pulsejet forum
Topic: "U" shaped valveless pulse-jet
Replies: 15
Views: 4042

Re: "U" shaped valveless pulse-jet

To me, it looks like a simplified version of Bruno's design, which has possibilities... If you can point me in the right direction, or make an educated guess, lend a hand. I don't have an unlimited cash resource, but I have time and patience to work with it. It may or may not work, but I'd like to g...
by J.L. Frusha
Thu Oct 08, 2009 12:26 pm
Forum: Valveless pulsejet forum
Topic: "U" shaped valveless pulse-jet
Replies: 15
Views: 4042

Re: "U" shaped valveless pulse-jet

Sorry, it's the only one I can find. It's Eric Beck's Avatar, on his forum. Not hearing from him, so I thought I'd ask here.
by J.L. Frusha
Thu Oct 08, 2009 5:03 am
Forum: Valveless pulsejet forum
Topic: "U" shaped valveless pulse-jet
Replies: 15
Views: 4042

"U" shaped valveless pulse-jet

This is NOT your typical pulse-jet...
http://s268.photobucket.com/albums/jj5/ ... lsejet.jpg
Does anyone know where I can get plans and design specs?

Thanks,
Jeff
by J.L. Frusha
Sat Sep 12, 2009 3:17 pm
Forum: Valveless pulsejet forum
Topic: Sonic tuning questions...
Replies: 2
Views: 1675

Sonic tuning questions...

Not sure if anyone has covered this, so I'll ask... Given that sonically tuned systems tend to show similarities, even in apparently unrelated applications, has anyone tried using the "fish-mouth" tail, of a Gluhareff, on a valveless? On the Glueys, it seems to reduce noise and possibly increase out...
by J.L. Frusha
Sat Sep 12, 2009 6:17 am
Forum: How to improve this site
Topic: New Members
Replies: 49
Views: 27494

Re: New Members

Sort of new sort of old... Moved a couple of times, got married, ended-up inactive. Back on-board... on the board... Something like that. Anywho, 46 y.o. guy in Texas. A lot of interests, especially aviation, so I always end-up visiting the same ideas... "All my life's a circle," to quote an old Har...