..Hank001 wrote:...my kid bother and I got short on funds and though about making our own model rocket engines... Parental good sense prevailed. .
(Guess that is sort of why I'm still here to comment on it.)
I did that.
(No parental supervision whatsoever. I didn't know what that was.)
Back in the day, you could go to the drugstore and by chemicals. I'd ride my bike to the drugstore (it was a bit further than just a walk) and buy what I needed to make "homemade fireworks." I was pretty close to trying out my own "rocket fuel" too. Thankfully, that didn't happen. I did end up blowing a hole in a neighboring school's soccer field, though... That rocket would have made it pretty a good ways, too, if it hadn't blown up, first. (Maybe it did make it a pretty good way? Or part of it, at least.)
Later, I started buying store-bought rocket engines. Of course, I'd use them to launch explosive devices since, what's the point otherwise? I launched a cricket, once, though. He didn't seem too impressed. Probably went higher, further and faster than any of his friends... ungrateful little bug. I climbed a lot of back-yard fences chasing after rocket stages when I was a kid.
Anyway - All of this was thanks to an old chem formulae book my dad, an engineer, gave me. But, he wasn't around to supervise the results so... stuff got blow'd the heck up!