XB-21 (航空機)
1. North American XB-21The North American XB-21, also known by the manufacturer's model designation NA-21, and sometimes referred to by the name "Dragon", was a prototype bomber aircraft developed by North American Aviation in the late 1930s, for evaluation by the United States Army Air Corps. Evaluated against the Douglas B-18 Bolo, it was found to be considerably more expensive than the rival aircraft, and despite the ordering of a small number of evaluation aircraft, only the prototype was ever built.
Read “North American XB-21” on English Wikipedia
Read “XB-21 (航空機)” on Japanese Wikipedia
Read “North American XB-21” on DBpedia
Read “North American XB-21” on English Wikipedia
Read “XB-21 (航空機)” on Japanese Wikipedia
Read “North American XB-21” on DBpedia
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