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The North American XB-21 (North American NA-21) was a prototype bomber aircraft evaluated by the United States Army Air Corps in 1937 but not ordered into production. The North American assigned model number was NA-21. The aircraft first flew on 22 December 1936, and the type was promising enough for the Air Corps to initially place an order for five YB-21 pre-production machines. All these were cancelled, however, when it was found that Douglas' comparable B-18 Bolo was available for around half the price ($63,977 against $122,600). Consequently, no aircraft other than the single initial prototype were built. [edit] Specifications (XB-21)General characteristics
Performance
Armament
[edit] See alsoComparable aircraft Related lists [edit] References and external links
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