Piasecki H-21

H-21 Shawnee/Workhorse
A US Army Piasecki H-21
General information
Type	Military transport helicopter
National origin	United States
Manufacturer	Piasecki Helicopter
Status	Retired
Primary users	United States Air Force United States Army French Army Light Aviation
History
Manufactured	1952–1959
First flight	11 April 1952
Retired	1967
Developed from	Piasecki HRP Rescuer

The Piasecki H-21 Workhorse/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, capable of being fitted with wheels, skis or floats.

The H-21 was originally developed by Piasecki as an Arctic rescue helicopter. The H-21 had cold-weather features permitting operation at temperatures as low as −65 °F (−54 °C) and could be routinely maintained in severe cold weather environments.