Piasecki-Vertol H-21C Shawnee helicopter

The Piasecki H-21 Shawnee is an American helicopter, the fourth of a line of tandem rotor helicopters designed and built by Piasecki Helicopter (later Boeing Vertol). Commonly called "the flying banana", it was a multi-mission helicopter, utilizing wheels, skis, or floats. Piasecki Helicopter
designed and successfully sold to the United States Navy a series of tandem rotor helicopters, starting with the HRP-1 of 1944. The HRP-1 was
nicknamed the "flying banana" because of the upward angle of the aft fuselage, which ensured that the large rotors could not strike the fuselage in any flight attitude. The name was later applied to other
Piasecki helicopters of similar design, including the H-21.

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