1930 Stearman Cloudboy L-6 / YPT-9
Lloyd C. Stearman formed Stearman Aircraft in Venice, Cal., in 1926. Here, he designed and built the first Stearman airplane, the C-1. This was followed quickly by the C-2. Aware of these fine designs, friends and investors invited him to Kansas to reestablish his company in Wichita on September 27, 1927.
The first Wichita product was the C-3MB Mailplane delivered to Varney Airlines. On August 15, 1929, Stearman Aircraft became part of United Aircraft and Transport Corp which controlled several businesses, such as United Airlines, Pratt & Whitney, Hamilton-Standard Propellers, Boeing, Sikorsky and Vought Aircraft.
In the early 1930s the fledgling Army
Air Corps that was still looking for suitable replacements for their ancient
Curtiss Jennys and early PT series aircraft. The military had a delicious
approach to selecting airplanes in those days: They would buy a half dozen each
of several different airplanes, fly them and place production orders for the one
they liked. The service test designation was Y, so the Series Six Stearmans
became YPT-9s. The competition, incidentally, was the YPT-7, Mohawk Pinto, made
Lloyd Stearman left the company he founded at this time to become associated with Walter Varney in his airline ventures. In 1932, Stearman became president of Lockheed Aircraft Corporation of California.
In September 1934, a government trust-busting suit separated United Aircraft's airline and manufacturing activities. Boeing Aircraft Co., renamed from Boeing Airplane Co. and a separate entity from Boeing Air Transport, pulled out of United and took Stearman with it as wholly-owned subsidiary airplanes in production and those subsequently produced to the end of WW II were Boeings by their paperwork and nameplates. In realty they were stubbornly called Stearmans by evryone associated with them.
The museum's Stearman YPT-9 was manufactured on July 20, 1930, as a Model 6. This series was designed primarily for military training, but a number were sold as commercial trainers and became known as Cloudboy.
Engine: Lycoming R-680-17 (B4E)
Max Speed: 120 mph
Cruise Speed: 100 mph
Landing Speed: 47 mph
Climb: 875 fpm
Service Ceiling: 15,000
Gas capacity: 38 gal.
Range: 300-500 miles
Length: 23 8
Height: 9 7 (tail up)
Wing Span: 32 0 (upper), 28 0 (lower)
Wing chord: 60 upper and lower
Total wing area: 150.3 sq. ft. (upper), 121.9 sq. ft. (lower)
Empty weight: 1880 lbs.
Useful load: 671 lbs.
Payload w/full fuel: 235 lbs.
Gross weight: 2551 lbs.