Required number of active clutch friction interfaces

Calculates simplified clutch torque capacity from clamp force, friction coefficient, mean radius, and number of active friction interfaces.

Calculates simplified clutch torque from ring radii for the uniform wear or uniform pressure model.

Calculates effective clutch friction radius for the uniform wear or uniform pressure assumption.

Calculates average friction-surface pressure from clamp force and friction ring area; it is not maximum pressure or a pressure distribution.

Calculates friction ring area from outer and inner radius.

Solves required clamp force for a target torque, friction coefficient, mean radius, and friction surface count.