North American B-25J-37-NC (S/N 45-8813), modified from block 35 greenhouse nose version to solid nose with eight .50-cal. machine guns. Note the mount points for four 5-inch rockets on each wing outboard of the engine. (U.S. Air Force photo)
North American B-25J-15-NC (S/N 44-29028). The "Buzz Number" (BD-028) was first added to aircraft beginning in November 1945 and continued into the 1960s when unit codes were placed on vertical stabilizers. (U.S. Air Force photo)
North American B-25J-37-NC (S/N 45-8827), the second to last solid nose conversion. The aircraft has undergone post-war conversion to an unarmed trainer version (TB-25J). Note the top turret has been removed. (U.S. Air Force photo)
The B-25J was the last B-25 production model manufactured by North American Aviation (NAA). Almost 4,400 B-25Js were built, far more than any other model. The B-25J was an improved B-25H but looked like a cross between a B-25C and a B-25H. The solid nose was replaced by a "greenhouse" with one fixed and one flexible .50-cal. machine gun. The bombardier was returned to the crew bringing the total to six men aboard.
NAA modified 800 J models by installing a solid nose in place of the bombardier's greenhouse. The solid nose housed eight .50-cal. machine guns bringing the total to 18 -- 14 of which were forward firing for strafing missions. NAA also produced field conversion kits for the solid nose version. The Royal Air Force received 316 B-25Js as "Mitchell III" and converted most (or all) of them to the solid nose version.
The B-25J, powered by improved Wright R-2600-29 radial engines, first flew on Dec. 14, 1943. Production of the aircraft was continued until August 1945 when 72 incomplete aircraft remaining on contract were canceled. These aircraft were flyable but not counted in the Army inventory. 4,390 B-25Js were built with 4,318 of them being delivered to the Army or diverted/direct delivered to Allied nations.
Last production model B-25
TECHNICAL NOTES: Armament: 12 (18 on the solid nose version) .50-cal. machine guns plus 3,200 lbs. of bombs Engines: Two Wright R-2600-29 turbo-supercharged radials of 1,700 hp each (takeoff power) Maximum speed: 272 mph at 13,000 ft. Cruising speed: 230 mph Range: 1,350 miles with 3,000 lbs. of bombs Service ceiling: 24,200 ft. Span: 67 ft. 7 in. Length: 52 ft. 11 in. Height: 16 ft. 4 in. Weight: 33,500 lbs. (maximum) Crew: Six Serial numbers: 43-3870 to 43-4104; 43-27473 to 43-28222; 43-35946 to 43-36245; 44-28711 to 44-31510; 44-86692 to 44-86897; 45-8801 to 45-8899