On August 31, 1965, fans of super-different airplanes could add another oddity to their list when the Aero Spacelines Super Guppy made its first flight. A bulbous looking whale of an airplane, the Super Guppy was the successor to the Pregnant Guppy, an equally goofy looking giant cargo plane.
Digging Deeper
As stated above, the Super Guppy had been developed from the Pregnant Guppy which in turn was based on the C-97 military cargo plane, itself based on the Boeing 377 airliner which in turn was originally based on the B-29 Superfortress bomber. (It would appear Boeing got their money’s worth out of the B-29 airframe as it had also been used to develop the B-50 bomber and the KC-97 aerial tanker.)