In the last two weeks I've been building a new military model: a US Marine Corps Bell-Boeing MV-22B Osprey. For those of you who don't know what it is, it's the world's first opertional tiltrotor aircraft, a vehicle that can hover like a helicopter for take-offs and landings with its rotors pointing up and, in flight, point them forward and fly like an aircraft.
I've been thinking about building it for years, but there were a few difficult bits that I could never quite figure out how to do until now. One of those is the wing. It has dihedral (it points up at the wingtips) and is swept slightly forward. Normally I'd build something like that by playing around with wegde plates and hinges, but because the engines are mounted at the tips of the wings, on the Osprey that wasn't possible. I chose to build the wings using stepped plates and half-stud offsets instead.
Here it is in helicopter mode.
MV-22B Osprey (9) by Mad physicist, on Flickr
and here it is in aircraft mode with the rotors pointing forward.
MV-22B Osprey (3) by Mad physicist, on Flickr
For rolling take-offs the rotors (and engines) can be set to intermediate positions.
MV-22B Osprey (1) by Mad physicist, on Flickr
The Osprey was designed to operate from the decks of ships. For compact stowage the aircraft has a complicated wing folding arrangement. This was the second big challenge, but also fun.
MV-22B Osprey (4) by Mad physicist, on Flickr
I've seen a fair few LEGO tiltrotor aircraft, but few people seem to have modelled the actual Osprey. I hope you agree that mine looks like the real deal.
Edited by Rufus, 20 November 2011 - 02:17 PM.