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Sikorsky S-38 / C-6


The S-38 was a nine-seat commercial amphibian powered by two 313kW Pratt & Whitney Wasp radial engines. A sesquiplane wing arrangement was employed and the tail unit was carried on two outriggers running aft from the main wing and braced to the heel of the hull by two struts. It was a successful design and many were built for airline use (including Pan American Airways, entering service in October 1938), private use and for the US Navy/USAAC. The type also set several world records for speed and altitude with specific loads. Over 100 were built from 1928 on


By 1929 the company, having become a division of United Aircraft Corporation, occupied a large modern plant at Bridgeport, Connecticut, and was producing S-38 twin-engined amphibians in considerable numbers.


A single 12-place S-38A was procured by the USAAC in 1929 for evaluation as C-6 29-406, also as Wright Field s/n XP-588. Eventually the aircraft, which had a length of 41'0", was used as a VIP aircraft.
Sikorsky C-6
The C-6 was followed by 10 C-6A production aircraft (30-397 – 30-406), used mainly for transport duties and target towing.
Sikorsky C-6A 30-400

Engines: 2 x 313kW Pratt & Whitney Wasp
Wingspan: 21.8/11.0 m / 72 ft 6 in / 36 ft 1 in
Length: 12.3 m / 40 ft 4 in
Height: 4.4 m / 14 ft 5 in
Wing area: 66.9 sq.m / 720.10 sq ft
Max take-off weight: 4753 kg / 10479 lb
Empty weight: 2970 kg / 6548 lb
Max. speed: 200 km/h / 124 mph
Cruise speed: 175 km/h / 109 mph
Ceiling: 5480 m / 18000 ft
ROC: 1000 fpm
Range w/max.fuel: 965 km / 600 miles
Crew: 2
Passengers: 10

C-6 / C-6A
Engines: 2 x P&W R-1340-7
Wingspan: 71'6"
Length: 40'3"
Max speed: 112 mph
Seats: 12


Sikorsky S-38




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