Sikorsky S-61 Military 1920-1939 But when production costs (originally

But when production costs (originally projected to be 3 million pounds) exceeded 13 million pounds

Boeing E-4B NEACP air force airplane model

a lone Hurricane had the honor of leading the RAF fly-past over London

3 m (24 ft) long

The F-4 was flown by the USAF

Sikorsky S-61 Military 1920-1939 But when production costs (originallySikorsky S 61 Helicopter airplane model. In September 1957 the US Navy awarded Sikorsky a development contract to produce an amphibious anti submarine warfare helicopter capable of detecting and attacking submarines. The prototype Sea King flew on March 11 1959, while production deliveries took place from September 1961. Power for initial production aircraft was supplied by two 930kW (1250shp) General Electric T58GE8B turboshafts. Development of a