XB-21

**????' ?????? XB-21**
**North American XB-21**
???????? ??????
???	????? ??????
??? ?????	????? ?????
????	????' ?????? ?????????
???? ?????	22 ?????? 1936
????? ?????	?? ???? ?????? ? ????
????	6-8
?????? ??????	1
????	122,000 ???? ??????? (??? 1936)

????' ?????? XB-21 ??? ?? ????? ?? ????? ?????? ????' ?????? ????????? (?????? ?????? ????? ??? NA-21 ) ?????? ?? ??? ???? ??????? ?? ??? ????? ????? ?- 1937 ?? ????? ?? ???? ????? ?????.

???? ?????? ??? ????? ?- 22 ?????? 1936 . ??????, ?????? ?????? ?????? ?? ??? ????? ????? 5 ????? ??? ????? ????? YB-21 , ?? ?????? ????? ?????, ??????? ?????? ?? ?????? ?????? B-18 ???? ?????? ????? ????????? ?????? ??? ?????? ?????? ?? ?-YB-21 ‏(63,977 ???? ??? 122,600 ????). ?????? ???, ?? ???? ?? ???? ???? ?? ???? ??? ????? ????? ?????? 38-485.

?-XB-21 ???? ????? ?-5 ?????? : ??????, ????? ?????? ?? ?? ?????, ?????, ????? ?????. ????, ????? ???????? ?????, ???? ???? ???? ?????? ?????? ?????? ???? ?????? ???? ?? ?? ????? ???? ????.

???????? (XB-21) [ ????? ??? ???? | ????? ]

????: 6-8
????: 61 ??? 9 ????' (18.8 ???)
???? ?????? : 95 ??? 0 ????' (29.0 ???)
????: 14 ??? 9 ????' (4.50 ???)
??? ???: 1,120 ??? ² (104 ??? ²)
???? ???: 19,082 ?????? (8,674 ?"?)
???? ????: 27,253 ?????? (12,388 ?"?)
???? ????? ????: 40,000 ?????? (18,000 ?"?)
????: ??? ?????? ???????? ???? R-2180-1, ?????? ???? ??? ????? , ???? ??? ?? 1,200 ???-??? (900 ????-????) ?? ???

??????? [ ????? ??? ???? | ????? ]

?????? ?????: 220 ???/??? (190 ???, 350 ??"?) ????? 10,000 ??? (3,000 ???)
?????? ????: 190 ???/??? (165 ???, 310 ??"?)
????: 1,960 ??? (1,700 ??? ???, 3,140 ?"?) ?????? ?????, 3,100 ??? (2,700 ??? ???, 5,000 ?"?) ?????? ?????
???? ???: 25,000 ??? (7,600 ???)
??? ?????: 1,000 ???/??? (5 ???/?????)
???? ???: 24.3 ??????/??? ² (119 ?"?/??? ²)