Last revised July 10, 1999
The Huff-Daland XHB-3 was a projected monoplane heavy bomber of the mid
1920s that was to be powered by a pair of 787 hp Packard 2A-2540
twelve-cylinder liquid-cooled Vee engines. The project was cancelled
before anything could be built.
United States Military Aircraft Since 1909, Gordon Swanborough and
Peter M. Bowers, Smithsonian, 1989.
American Combat Planes, Ray Wagner, Third Edition, Doubleday, 1982.
American Warplanes, Bill Gunston
Jane's Encyclopedia of Aviation
U.S. Army Aircraft, 1908-1946, James C. Fahey