An interesting aspect of the XC-99 program was Convair's almost successful attempt at turning the massive double-decker cargo-ship into a luxury airliner.

During the 1950s, an aircraft (XC-99) was parked at Kelly AFB. I believe it was the prototype (cargo version) of the Convair B-36 intercontinental nuclear bomber, flown by the Strategic Air ...

With a wingspan of more than 70m (230ft), Convair's planned civil variant, the Model 37, could seat more than 200 airline passengers. Reporting on the first flight of the XC-99, which weighed 120t ...

That distinction would go to the Convair B-36 “Peacemaker,” a strategic bomber that was operated from 1949 to 1959. It was also the largest mass-produced piston engine aircraft ever built ...