Martin XLB-4

Last revised July 10, 1999




The Martin XLB-4 was a 1926 proposal for an all-metal biplane bomber powered by a pair of Pratt & Whitney R-1690 Hornet radials. The USAAC ordered one prototype and assigned it the serial number of 27-332, but the Army was reluctant at that stage to experiment with all-metal aircraft, and the project never got off the drawing board.

Sources:

  1. United States Military Aircraft Since 1909, Gordon Swanborough and Peter M. Bowers, Smithsonian, 1989.

  2. American Combat Planes, Ray Wagner, Third Edition, Doubleday, 1982.