Here is a different type of motor. The Jetex. This one is a Scorpion 600. I had a 50 when I was a kid and managed to get it work pretty well. Bought the Pellets from John Churches hobby in Lapeer. The motor had a kind of “Ammonia” smell as it ran with a hissing sound. Just enough thrust to fly a light hand launch glider. Ran for about 5 seconds. Fun stuff!