The Boeing Vertol CH-46 Sea Knight is an American medium-lift tandem-rotor transport helicopter powered by twin turboshaft engines. It was designed by Vertol and manufactured by Boeing Vertol following Vertol's acquisition by Boeing.
V-107 prototype in 1961
A CH-46D assigned to HC-11 lifts cargo during a VERTREP mission with USS Abraham Lincoln.
A door gunner manning a pintle-mounted .50-caliber M2 machine gun aboard a Marine CH-46, August 2006
Piasecki Helicopter
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Piasecki Helicopter Corporation designed and manufactured helicopters in Philadelphia and nearby Morton, Pennsylvania, in the late 1940s and the 1950s. Its founder, Frank Piasecki, was ousted in 1956 and started a new company, Piasecki Aircraft. Piasecki Helicopter was renamed Vertol Corporation in early 1956. Vertol was acquired by Boeing in 1960 and renamed Boeing Vertol.
XHRP-1 during flight trials (1946)
YH-16 prototype in flight