Originally Posted by
FUMR
Presumably just before contact with the ground, which would make sense.
Actually makes no sense at all.
It's not going to save the propellors and can do more damage to the engines should a feathered blade find a crack or something it can dig in to.
Many years ago I saw a Duchess land nosewheel up with the props feathered on a dirt runway. Feathered blade dug in and tore the engine and mount out of the air frame.
There was a similar situation with an Aztec more years ago that flipped and killed all five on board.
Let the props go, why try to save something that belongs to the insurance company as soon as it touches the ground anyway.