LOL. My 7th grade science teacher wouldn't teach me (probably good judgment on his part), so I went to the library encyclopedia and looked it up. I later snuck into the science lab, got the ingredients, mixed them together, poured out a line and lit it. Poof! It left a terrible scar on the wall and stunk up half the school. I eventually had to fess up. The grownups were not happy. 45 years later, that scar still remains.
As I remember it, we made about 5 pounds of the stuff.
The “rocket” was about 4’ long and we had a “shuttle” on the back of it which was about 1.75” long.
Lucky we didn’t kill ourselves!