Here is one of my four Jet skateboards. This is the “Bronco Bob” Jet board with a single Maddoxjets 60 pound thrust, fuel injected on gasoline and will run about a minute and a half on the tank.
As you may know, I build Valved pulsejet engines , but I have taken up valveless engines.
My engines run on injected gasoline not propane which makes them a lot safer and you don’t have
to carry around a huge propane bottle. 3/20/1016