I am now using a string as a mechanism. I am wrapping string around a rod with a propeller. As the propeller spins, it pulls on a piece of wood which triggers a mousetrap, which fires a projectile.
1. The Project
I must build a boat that is able to propel itself via elastic or gravitational energy 1.0 metres. After it has moved 1.0m, it must automatically shoot a projectile 2.0m perpendicular to the movement.
2. Rules
The boat cannot touch the bottom of the 10 cm deep pool.
Any...