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North American NA-21 / XB-21

na-xb-21

 

Similar in appearance to the Douglas B-18 Bolo, but intended to achieve significantly improved performance, the North American NA-21 bomber was developed at the company's Inglewood, California plant during 1935-3, the prototype being completed in March 1937 at a cost of $122,600.
 
 NA-XB-21-01
North American XB-21 38-485
 
Powered by two 895kW Pratt & Whitney R-1820 Twin Hornet engines with F-10 turbo-superchargers, the XB-21 carried a six-man crew and armament comprised single 7.62mm machine-guns in nose and dorsal turrets, plus a similar weapon in each of the ventral and two waist positions. Short-range bomb load was 4536kg, reducing to 998kg over 3058km.
 
NA-XB-21-02
North American XB-21 Nose mod at Wright Field
 
Only the prototype was built, 38-485, as XB-21 Dragon, an unofficial title, with no appeal to the USAAC despite a second attempt the following year by Douglas to use it for their B-23, which led to the NA‑40 prototype, which led directly to the B-25.
 
XB‑21
Engines: 2 x Pratt & Whitney R-1820 Twin Hornet 1200 hp
Wingspan: 28,96m / 95 ft 0 in
Length: 61'9"
Max weight: 18144 Kg / 40001 lb
Useful load: 8171 lb
Power loading: 7,560 Kg/hp
Max speed: 354 kph / 220 mph
Cruise speed: 190 mph
Ceiling: 25,000 ft
Range: 3060 km
Armament: 3 x 7,62 mm mg
Bombload: 4535 kg
Crew: 6

 

na-xb-21-ld

North American XB-21

 

 


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