| Role | Medium bomber |
|---|---|
| National origin | United States |
| Manufacturer | North American Aviation |
| First flight | 19 August 1940 |
| Introduction | 1941 |
| Retired | 1979 (Indonesia) |
| Primary users | United States Army Air Forces Royal Air Force Soviet Air Force United States Marine Corps |
| Number built | 9,816[ |
| Developed from | North American NA-40 |
| Developed into | North American XB-28 Dragon |
The US Army Air Corps issued a specification for a medium bomber in March 1939 that was capable of carrying a payload of 2,400 lb (1,100 kg) over 1,200 mi (1,900 km) at 300 mph (480 km/h) North American Aviation (NAA) used its NA-40B design to develop the NA-62, which competed for the medium bomber contract. No YB-25 was available for prototype service tests. In September 1939, the Air Corps ordered the NA-62 into production as the B-25, along with the other new Air Corps medium bomber, the Martin B-26 Marauder "off the drawing board".
Most B-25s in American service were used in the war against Japan in Asia and the Pacific. The Mitchell fought from the Northern Pacific to the South Pacific and the Far East. These areas included the campaigns in the Aleutian Islands, Papua New Guinea, the Solomon Islands, New Britain, China, Burma and the island hopping campaign in the Central Pacific, as well as in the Doolittle Raid. The aircraft's potential as a ground-attack aircraft emerged during the Pacific war. The jungle environment reduced the usefulness of medium-level bombing, and made low-level attack the best tactic. Using similar mast height level tactics and skip bombing, the B-25 proved itself to be a capable anti-shipping weapon and sank many enemy sea vessels. An ever-increasing number of forward firing guns made the B-25 a formidable strafing aircraft for island warfare. The strafer models were the B-25C1/D1, the B-25J.
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At 9:40 on 28 July 1945, a USAAF B-25D crashed in thick fog into the north side of the Empire State Building between the 79th and 80th floors. Fourteen people died — 11 in the building and the three occupants of the aircraft, including the pilot, Colonel William F. Smith.[48] Betty Lou Oliver, an elevator attendant, survived the impact and the subsequent fall of the elevator cage 75 stories to the basement
During World War II, the Mitchell served in fairly large numbers with the Air Force of the Dutch government-in-exile.
The initial production version of B-25s, they were powered by 1,350 hp (1,007 kW) R-2600-9 engines. and carried up to 3,600 lb (1,600 kg) of bombs and defensive armament.
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