Hey thats pretty cool !
I did a project on calculating average speed and motion with my son years ago for physics.
We built a 6 inch rocket out of balsa wood and bored out the bottom to fit a co gas bottle like the ones used in soda water makers for the engine.
A long piece of fishing string was tied between goal posts for the full lenght of the football field.
2 Hooks screwed into the rocket. Rocket hooked onto fishing wire.
Puncture a hole in the co bottle and watch her fly.
Lots of fun!
Damm fast.
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