pic: Offseason Shooter CAD Project

[Ether]

Originally Posted by Sperkowsky

..the free speed after reduction ... is around 9005 RPM. JVN's Calculator it says in reality it will be about 8990.4 RPM

I was asking about the expected operating speed, not the free speed... or are you saying you expect to operate the shooter with 100% voltage (with no headroom for closed-loop control) ?

[Sperkowsky]

Originally Posted by Ether

I was asking about the expected operating speed, not the free speed... or are you saying you expect to operate the shooter with 100% voltage (with no headroom for closed-loop control) ?

Well, we probably will have some sort of closed loop control but I am not to sure at the moment. This year we ran our shooter motors at 80% so I am going to guess if we build this shooter we will do the same. So, I am going to guess the shooter motors would run at about 7000 RPM.

[Ether]

Does anyone have a link to a trustworthy number for the rotational moment of inertia of the CIM rotor?

It might be instructive to do some trade-off computations comparing the increase in rotor angular momentum with increasing rotor speed versus the drop-off of CIM torque with increasing rotor speed.