For young aspiring engineers here who may read this and just like the sound of "building jet engine", look into building a pulse jet first. They're extremely e

For young aspiring engineers here who may read this and just like the sound of "building jet engine", look into building a pulse jet first. They're extremely easy to build, having no moving parts, and only requiring some steel tubing, a welder and a large propane tank. I've already done it and can attest to this being true. The "best" part is that they're incredibly, obnoxiously loud. Like wear earplugs and ear muffs at the same time loud. Efficiency isn't great, you can expect maybe 20-100 lbs thrust from larger models but I suppose that's more than enough for "let's grab an old bicycle and do something really stupid" (oh and look pulsejets up on youtube for sure, it'll open up a whole world for you in under 20 minutes)