Pan Americans Flying Boat The Sikorsky S 42

The Sikorsky S-42 was an 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 development Based 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 mph (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 history Flying for Pan American Airways, a total of 10 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. All Sikorsky S-42s were either scrapped or destroyed in accidents. Variants S-42 Production aircraft with four 700 hp (522 kW) Pratt & Whitney Hornet S5D1G radial engines, three built: NC 822M, NC 823M, NC 824M. 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, four built: NC 15373, NC 15374, NC 15375, NC 15376[3]. S-42B Production aircraft with aerodynamic improvements, constant-speed Hamilton Standard propellers and a further 2000lb (907Kg) increase in maximum take-off weight, three built: NC 16734, NC 16735, NC 16736. Specifications (S-42-A) General characteristics Crew: 4 Capacity: up to 37 day passengers or 14 sleeper berths Length: 68 ft (20.73 m) Wingspan: 118 ft 2 in (36.03 m) Height: 17 ft 5 in (5.3 m) Wing area: 1,329 ft² (123.5 m²) Empty weight: 19,764 lb (8,984 kg) Loaded weight: 38,000 lb (17,273 kg) Powerplant: 4× Pratt & Whitney R-1690 Hornet, supercharged radial engine, 660 hp (492 kW) each Performance Maximum speed: 188 mph (300 km/h) Range: 1,930 miles (3,088 km) Service ceiling: 15,704 ft (4,788 m) Rate of climb: 1,000 ft/min (305 m/min) Wing loading: 28.6 lb/ft² (140 kg/m²) Power/mass: 0.07 hp/lb (0.11 kW/kg) Sound track: You Made Me Love You, Performed by Harry James
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