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Sikorsky S-42
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The Sikorsky S-42 was an 1930s American commercial flying boat designed and built by Sikorsky to meet a 1931 requirement from Pan American for a long-range transatlantic flying boat.
Design and developmentBased on the earlier Sikorsky S-40 that flew in 1931, Igor Sikorsky and Charles Lindbergh, working at the time as a Pan American Airways consultant, laid out plans for a new, larger flying boat. During the S-40's inaugural flight on 19 November 1931, the two visionaries began preliminary sketches on the back of a menu in the S-40's lounge.
Pan Am's president, Juan Trippe, had a similar vision of an aircraft able to span oceans. The new design provided for an increased lifting capacity to carry enough fuel for a 2,500 mile nonstop flight against a 30 mile-an-hour (48 km/h) wind, at a cruising speed far in excess of the average operating speed of any flying boat at that time. Pan Am was also courted by Glenn Martin but Sikorsky's S-42 was delivered first, as the Martin M-130 was still almost a year away from completion.
Operational historyFlying for Pan American Airways, a total of ten S-42s were built, manufactured by the Vought-Sikorsky Aircraft Division of the United Aircraft Corporation in Stratford, Connecticut. The aircraft first flew on 30 March 1934. The S-42 was also known as the Flying Clipper and the Pan Am Clipper.
British Marine Aircraft Ltd. was formed in February 1936 to produce S-42-A flying boats under licence in the United Kingdom but nothing came of this. The company built a factory on the western side of the Hamble peninsula with a slipway to Southampton Water. When the deal fell through the company was sold to H.P. Folland, who renamed it Folland Aircraft Limited.
All Sikorsky S-42s were either scrapped or destroyed in accidents.
VariantsS-42
- Production aircraft with four 700hp (522kW) Pratt & Whitney Hornet S5D1G radial engines, three built.
S-42A
- Production aircraft with four 750hp (559kW) Pratt & Whitney Hornet S1EG radial engines, longer wings and a 2000lb (907Kg) increase in maximum take-off weight, three built.
S-42B
- Production aircraft with aerodynamic improvements, constant-speed Hamilton Standard propellers and a further 2000lb (907Kg) increase in maximum take-off weight, four built.
Specifications (S-42-A)External links
See also
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