www.pulse-jets.com

Hmm, how about this? http://img442.imageshack.us/img442/9219/pj66.gif I like it. Thermal distortion won't be a problem on the intake, since the intake does not get that hot. The pointy part where the intake comes into the CC area may need to be looked at. If you build this you may want to put a fla...

There are a few topics here about using a pulsejet as the flameholder for ramjet, but it occurs to me that you don't need the PJ to be the flame holder , you can use the PJ as the flame . The air in a ramjet doesn't need to burn , it just needs to be made hot by the time it goes out the back. You ca...

Try to find the original article on the engine and have it translated. So far I found this clip which is only slightly related to what we want but still interesting. http://www.youtube.com/watch?v=b0KJwa5iWTY A search yielded several good diagrams of it on here but that's about it. The name is too ...

Yes, that one was reportedly tested by Messerschmitt successfully, but why would you need one? What's wrong with the simple bending of the tube backwards? It's not like youl need fantastic aerodynamic qualities in real life. You are not building a cruise missile, right? No, but it's nice to have th...

Ahh, I see now why they don't work. What about the ones like that Messerschmitt ones that uses the Coanda effect? Those seem halfway workable.

According to the people who have experimented with variations on Tesla's valvular conduit it does not perform as advetised. What I'm wondering is this. Is it possible that the reason is because the passageway for the reverse flow is longer than the one for the flow it's supposed to stop so that by t...

Seems a little like the idea I posted here. http://www.pulse-jets.com/phpbb3/viewtopic.php?f=4&t=5105&start=15 One issue I can see is that the angle of the jets is fixed and so would only have maximum efficiency at one specific RPM and forward speed. I can think of a few ways to adjust for this but ...

This is an attempt to allow better flow-through in the open position and longer valve life by using spring-actuated bottle-shaped plug valve. http://img546.imageshack.us/img546/9669/pjet5.png I have the plug fairly long so the blast hits the base and startes pushing it closed before it can leak back...

I wonder if I'm going about this backwards. We've all heard of mishaps where an engine or gun or something has experienced an unexpected choking or blowback. Maybe some pre-existing structure can be copied and made to do so on purpose. I've seen a few cutaways of gun silencers that make me think "He...

Hmm, how about this?

Played around with the design a bit more. http://img510.imageshack.us/img510/6403/pjdrawing2.gif Added some space between the inner and outer tubes and staggered them to keep from ingesting each other's exhaust. Also made a hollow space running straight through the middle for more suface area expose...

So enlarge the outer tube so it's not in contact with the inner one and shift the position where the bend starts so the inlets are staggered? Considering that this design was pulled directly from my rectum while playing around with MS paint, I think achieving "interesting" on my first iteration of i...

This notion just came to me and I was wondering if it's any good. Basically, instead of two pipes running side by side and joined by a curve, the pipe folds back over itself. http://img846.imageshack.us/img846/1792/concentricpulse.gif I can see potential issues with the curve being as sharp as it is...

I think the aussie guy with the hoverbike would be beter off with adjustable-pitch fans that can autorotate rather than parachutes since this thing is almost never gonna fly high enough for a chute to deploy. Ideally it would have some kind of emergency power like a CO2 canister or something that wo...

Yeah, I see how it's supposed to work. I'm just not sure you can get enough of a boost from each stage that it won't have to be impractically long. I think others had the idea of a pulse jet as the first stage in an arrangement like that.