Martin XB-33 Super Marauder

The XB-33 Super Marauder was a proposed American Second World War bomber designed by the Glenn L. Martin Company as the Martin Model 190, a high-altitude development of its B-26 Marauder. Design began in 1940 with a twin-engined, twin-tailed medium bomber using Wright R-3350 engines and pressurised crew compartments, but it soon became clear that two engines could not deliver the performance the Army wanted. Martin therefore moved to a larger four-engined version, the XB-33A, and the Army Air Forces ordered two prototypes. Because the R-3350 was wanted for the B-29, the redesign switched to Wright R-2600 radial engines, and the bomb load was to match the 12,000 pounds of the B-24 Liberator. On 17 January 1942 an order for 400 B-33A aircraft was placed for the Omaha plant, but the project was cancelled on 25 November 1942 so that plant could build B-29s, and no aircraft was ever completed.