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A valveless pulsejet is a type of jet engine with no moving parts. It can run statically and be throttled over a wide range. Unlike turbojet / turbine engines they do not have any spool up time, and can be throttled to back and forth from minimum to maximum throttle many times a second.Прикольно.
While they do get extremely hot, they are surprisingly efficient compared to hobby RC turbine engines. Pulsejets have no moving parts, and they use sound waves to compress the fuel air mixture. This natural compression is very efficient, compared to mechanical compression of turbines and turbojets. Because of this a good valveless engine will actually be more fuel efficient than the average hobby turbine, and if you use a thrust augmenter duct with the pulsejet, the efficiency can easily jump to twice that of a turbine.
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