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wow…nice…but the extra engines are NOT mounted directly on the B-747’s wings…did u notice the space shuttles engines are covered up and streamlined to reduce drag.
i saw this NASA Boeing 747-200 with re-designed winglets on the tail fin for increased stability of the aircraft in the flight.
i saw this aircraft with the space shuttle on its back when it took a flyover over Toronto for exhibition some years ago. it was a pretty sight :)**