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"Afterburners on valveless pulse jets

Posted: Fri May 15, 2009 5:38 pm
by rtemple989
Hi, my name is Rick, im 19 and have been into pulse jets for quite a while now. Though ive been told many times that it is impossible to add an afterburner to any form of pulsejet, ive done my math and my understanding of physics is pretty A+. The way ive figured is that there has GOT to be a way to use an augmentation system to bring enough extra oxygen into the exhaust stream of a pulsejet and burn extra fuel in this stream by re-compressing the incoming air in a specially modified tube and using it to milk extra power out of an otherwise low thrust jet. I have several designs that ive been working on and have had much outside input from reliable sources...However u guys seem to be the experts and i wanted to get an expert opinion about it. My designs in no way interfere with the normal operation cycles of pulsejets and i dont see any way that it could even POSSIBLY interfere with the operation seeing as it is a separate device (quite like a very special augmentor!) All i need to know if this has been tried before so i can save myself the struggle of pursuing a losing battle with something that has already been tried with negative results...

Re: "Afterburners on valveless pulse jets

Posted: Sat May 16, 2009 4:54 am
by Zippiot
In the ramjet forums somewhere is a ramjet being pumped by a valveless PJ, similar kinda but it worked very well if I recall.

Re: "Afterburners on valveless pulse jets

Posted: Sun May 17, 2009 4:18 pm
by ace_fedde
Take a look at Eric Becks website,, if I remember well. You will find the answer, and pictures, there.


Re: "Afterburners on valveless pulse jets

Posted: Thu May 21, 2009 5:30 am
by Eric
Yes its possible.

There are no isolated systems, the augmenters and afterburners are separate from the pulsejet, but that does not mean that the resistance, or pressure wave reflection they produce will not interfere with the pulsejet.

A lot of pulsejets will flame out simply by putting objects behind them, the reflected pressure pulses are enough to throw things off.

Here's a vid from almost 3 years ago now...