pulsejets for RC models

http://www.youtube.com/watch?v=jEnNMTMZadw&feature=related

Worked for V-1----loud as hell that's why they were called buzz bombs.

Simple to figure out--fuel is squirted in, the flapper valve slams shut--the kinetic energy is converted to head (pressure),ignite it, and open the flapper valve for thrust.

No whirling compressors, fans, turbines--you just need to get it moving to get it started.

Rap

I heard one somewhere around 1960. Yeah, it was loud.

The guy explains it; the vacuum created by one exploding charge blowing out the tube sucks the next charge into the front chamber and then the valves shut again. Very much like reed valves into the lower chamber of an old 2-stroke engine. If it isn't loud something's wrong.

Un huh. The one I saw demonstrated needed to be started with a bicycle pump as I recall.