pic: Team Rush 27 - Shooter Concept

[Chriszuma]

Originally Posted by Parker

Keep in mind that if the wheels aren't spinning at exactly the same speed, the balls won't fly straight. Every motor, even if they're the same design, will spin at different speeds.

A simple chain and sprockets can be used to ensure that both wheels are spinning at exactly the same speed, and additionally eliminate the need for two motors, saving weight. In our mockup testing, this actually outperformed alot of other methods.