The plan

Here’s the plan so far: connected to the stump will be a hollow tube with a dome to connect to the leg. Inside the hollow tube will be a piston rod with a ball at the end of it, which will into a ball joint connected to the pedal. This may change if we want to pursue our egg shaped idea, but based on what Emmet helped me design on Tinkercad, this may be the best course of action. The leg’s linear motion will be turned into rotational motion by the tube with the piston rod, and the ball joint will transfer that energy into the pedal, and propel it forward. Fun!