I agree with all the posts above, the C-17 is way to fuel/range ineff to be considered. (maybe they could sell a package deal with 767 tanker concept
Along the same lines though:
the C-17 were stretched to make the aerodynamics better, and thus the range better, and if a mid floor was built in, would Cargo carriers be more interested?
Similarly, Cargo carriers seem to focus on buying freighter versions of pax aircraft. What would it take for a Cargo carrier to buck this trend and look for an airplane designed from the ground up to operate as a cargo aircraft?
I think the ability to resell the aircraft and the tremendous commonality between pax/cargo conversions is a big hurdle to selling an all cargo aircraft to the Cargo carriers.
Air transport is just a glorified bus operation. -Michael O'Leary, Ryanair's chief executive