passenger or cargo work, seven built. C-11 One Model 17 bought for use of the United States Assistant Secretary of War and designated Y1C-11, later modified to Model 17-2 standards and redesignated C-11A. C-22 Refined version of the Model 17 for the United States Army Air Corps, three built. Operators Argentine Navy, one model 17, coded T-202 Spanish Republican Air Force – Model 20-A United States Army Air Corps - three C-22 United States Department of War - one Y1C-11, later converted to C-11A Specifications (Model 17) See also References Andrade, John. U.S.Military Aircraft Designations and Serials since 1909, Midland Counties Publications, 1979, (Page 171) Wegg, John. General Dynamics Aircraft and their Predecessors. London:Putnam, 1990. . The Illustrated Encyclopedia of Aircraft (Part Work 1982–1985), 1985, Orbis Publishing External links 1930s United States airliners Fleetster High-wing aircraft Single-engined tractor aircraft Aircraft first flown in 1929