A single Bell-built B-29 (44-24043) was modified as a testbed for
General Electric jet engines and redesignated XB-29G. The engine was
mounted on a cradle in the bomb bay which could be extended below the
aircraft to test its operation in a fast airstream.
Warbird History--B-29 Superfortress, Chester Marshall, Motorbooks
The Boeing B-29 Superfortress, Mich Mayborn, Aircraft in Profile,
B-29 Superfortress, John Pimlott, Gallery Books, 1980.
Famous Bombers of the Second World War, William Green, Doubleday,
Boeing Aircraft Since 1916, Peter M. Bowers, Naval Institute Press,
United States Military Aircraft Since 1909, Gordon Swanborough and
Peter M. Bowers, Smithsonian Institution Press, 1989.
Jane's Fighting Aircraft of World War II, Bill Gunston, Military
American Combat Planes, Third Enlarged Edition, Ray Wagner,