OMG, what is this?

[qdrummer21]

Just did some research and talked to some private pilots. The idea behind feathering is for twin engine planes in the event of a single
engine failure. In this case the failed engine will begin to windmill and creates drag on that side of the plane. By feathering the prop the
airflow passes over the blades with a Angle of Attack close to zero thus minmizing any lift generated by the prop and ceasing the windmill
and eliminating the resulting asymetric drag. Standard procedures calls for no feathering of the prop during normal operations as it puts
unnecessary strain on the engine. If both engines are shut off/fail there is no need to feather the props to as there is no asymmetric drag
and the plain will not yaw in either direction. However, in this case feathering the props will decrease the amount of parasite drag
caused by the props and give the aircraft slightly better glide performance.

As far as the restart I've found documented cases of aircraft not being able to restart their engines after a full feathering of the prop due to
safety cutouts that detect the prop speed. I didn't get too many details on this. However there are also documented cases of twin props
loosing electrical power after running on one engine with the second unfeathered. The documentation I found was from the faa and can
be found here: http://www.faa.gov/aircraft/safety/alert...-05-51.pdf

If MSFS or the aircraft model you were using acurately simulates the electrical system this is the problem you could have experienced.