How about trying this...or at least checking my logic

Any try to feather the prop?
Only reason I say this is because when the engine is off, like when the mk1's are fuel starved the prop is in effect driving the engine? So feathering the prop might let you get enough forward momentum to get the craft righted? Just a thought, kind of odd, but it's like getting your max glide from a engine dead plane by feathering your prop and hitting alt x. It sounds wrong but head to the TA and try it, it works like a charm when nursing a wounded bird back to base.
Just a thought anyway
