Long Duration End Burner PVC Cased Rocket Engines

My goal was to create my own D and E impulse rocket engines that run for a longer duration than commercially available motors. I also desired lower thrust for a given impulse class than, for instance, Estes motors. These motors are the result. Although PVC doesn't tolerate heat well (it gets soft), these motors don't run long enough for that to be an issue despite NO insulation on inside wall. Many people have built core Burner rocket motors using PVC as a case, I'm not aware of many/any using PVC as an end-burner.

Видео Long Duration End Burner PVC Cased Rocket Engines канала AttoPilot