Last revised July 17, 1999
The Martin B-13 was a proposed version of the YB-10 powered by a pair
of 650 hp Pratt & Whitney R-1860-17 engines. Twelve examples were
ordered but were all cancelled before delivery.
United States Military Aircraft Since 1909, Gordon Swanborough and
Peter M. Bowers, Smithsonian, 1989.
American Combat Planes, Ray Wagner, Third Edition, Doubleday, 1982.
U.S. Army Aircraft, 1908-1946, James C. Fahey