"Everyman's Jet Engine" - Why Valveless Pulsejets?
At low speeds (i.e. typical "model airplane" speeds), no jet engine will be as fuel efficient as a
conventional piston engine. However, modern valveless pulsejet designs can achieve reasonable fuel
consumption figures, especially in higher speed classes of models, where piston-driven airscrew
propulsion starts to lose efficiency. A few designs, when well-tuned, have been able to do better
than 1.0 kg (mass) per hour of fuel per kg (force) thrust. That is considered very good fuel
consumption for a small jet engine -- with the use of "thrust augmentor" technology, even lower
consumption figures should be easily attainable.
- Reasonable fuel consumption at low subsonic airspeeds