Comment by openasocket
4 years ago
Fascinating, haven't heard of this. Some googling suggested there is some active research in this area, and at least some active use by hobbyists and by the military in target drones. Seems like a promising angle for a cheaper cruise missile, at least on the engine front.
They are loud, though, because they use ~100 Hz wave compression for their combustion, instead of continuous-flow as with a non-pulse jet.