More than two wheeled linear shooter and the math behind it?

[Ether]

Originally Posted by clandry94

Does anyone know the math behind the linear shooter design and if more than two wheels would help boost the distance of the shooter?

Here are a few rules of thumb:

For a 2-wheel shooter, you want to spin the second wheel about 35% faster than the first.

There's a point above which if you increase the wheel speed, the speed of the frisbee will actually decrease (due to excessive slipping).

Greater moment of inertia in the wheels allows them to maintain their speed as a frisbee passes through.

Use closed-loop speed control (like bang-bang) to improve spinup and recovery performance.

You want the frisbee to roll on the guide rail, not slide. Do not use a low-friction surface for the guide rail.

Experiment with wheel material, frisbee compression, and frisbee placement (in the axial directiom) relative to the wheel.