Piasecki Helicopter Corp Morton, PA, First Flight 1952, Twenty-two seats
Additional Information from Apostolo
Piasecki H‑21 Workhorse
Acquisition Source: Government Surplus
From the all‑metal PV‑17 built in 1948, the following year Piasecki derived the HRP‑2 (Rescuer) and an improved version of the Rescuer, the H‑21 Workhorse. The USAF acquired 214 of the latter, and 334 of a similar model, the H‑21 Swanee, were built for the US Army. The B and C variants of the H‑21 were used in Vietnam, equipped with 12.7 or 7.62 mm light machine guns which were fired through the cabin doors. The H‑21 used the classic single engine formula with tandem three‑blade rotors. While the Navy's helicopters had a 600 hp Pratt & Whitney R‑1340 engine, those for the Army had a Wright R‑1820. Thirty‑three of the H‑21A were assigned to SAR units in the Arctic and another five were sent to Canada. Foreign operators of the H‑21 included the German Army (26), French Army (98), French Navy (10), Japanese armed forces (10) and Swedish Navy (11).