[CONTEST] Alternative Drive (entry)

Build a motor/engine to drive a car without using DC motor, Servo Motor or Simple Motor. The final drive of your motor/engine must be rotary output.

I've created an example vehicle.

- Rules -

- No Servo Motors, DC Motors or Simple Motors.
- Linear Servos/Motors are allowed.
- Rockets/Thrusters/Fans/Emitters are allowed but most not directly contribute to the forwards momentum of the car.
- No gravity alterations or changing the level attributes.
- Lua is allowed only as a starter motor (if your engine needs one) however a ramp or self starter is preferable.
=you can edit to see my lua=
- Delete my example vehicle.
- Must be a derivative of this level.

Don't forget, the final output of your motor/engine must be rotary.

You have 2 weeks. Have fun.