Keywords: aviation aircraft airplane bomber military aviation militaryaviation prototype flight test flighttest united states air force unitedstatesairforce us air force usairforce usaf glenn l. martin company glennlmartincompany martin company martincompany martin martin xb-51 martinxb51 xb-51 xb51 martin b-51 martinb51 b-51 b51 general electric generalelectric ge general electric j47 generalelectricj47 ge j47 gej47 j47 general electric j47-ge-13 generalelectricj47ge13 j47-ge-13 j47ge13 trijet blackandwhite monochrome vehicle outdoor black and white NARA B26521..11 Jul 51 NARA B26521..11 Jul 51 |