Originally Posted by edi
OK, so what's feathering?
Twisting the blade so it rotates along the long axis. Tilting the spindle feathers the blades, so does moving a swashplate. Essentially you change the blades angle of attack with respect to the shaft as the blade rotates. Swashplate control does this mechanically with a feathering bearing. Tilting spindles do it by actually tilting the shaft with respect to the rotor plane. This is detailed in the post above about cyclic.