What happened to the big Boeing? I remember seeing photos of a mock-up 'Super Chinook' which was proposed in the 60's?/70's? - when BAH (sigh) had 234LRs carrying 44 pax the biggie was said to accomodate something over 200 - gives you an idea of the size.
But apparently stalled not because of engine power but no available gearboxes to transmit the power. At the time we thought maybe the Lynx-style conformal gearteeth might have been a way forward but nothing heard since....
Never did work out what it might be used for, though - perhaps installing offshore jackets in one lift?