This may be a silly question - but why does the V22 not have it's engines horizontally mounted over or under the wing roots driving the rotors by shafts and gearboxes that I presume it already has for cross coupling?
This would avoid having to tilt the engines and make FOD ingestion easier to handle, reduce the weight slung a long way outboard and probably ease maintenance.
I await the incoming flak for not seeing the obvious..............
D