Prop Feathering w/o aux pump in C-130 Technical Posted May 6, 2018 Back in the late 90s a Ham Standard rep came down to Hurbie and taught us a class. He said that if you placed the condition lever to feather inflight and the Aux motor didn't work the blade angle MAY get high enough that the prop won't windmill. Of course that is depending on airspeed. My experience on the ground during emergency egress is that the props made it to the cuff which is approximately 45 -50 degrees(I think). Your mileage may vary.