Douglas_XB 19 Douglas_XB 19 là một loại máy_bay ném bom cỡ lớn của Quân_đoàn Không_quân Lục_quân Hoa_Kỳ Tham_khảo Ted_Lawson_Pilot on The_Ruptured_Duck of Doolittle_Raid fame worked on the B19 flap system as an engineer He mentions this in his amazing book Thirty_Seconds_Over_Tokyo Liên_kết ngoài BULLET Encyclopedia of American aircraft BULLET USAF Museum description of B 19 BULLET USAF Museum description of B 19A BULLET Popular_Science_October 1940 Uncle_Sam_Builds_Europe and Back_Warplane_BULLET_The World s Biggest_Bomber_Popular_Mechanics December 1940 BULLET Man_O_War_With Wings_Popular_Mechanics_July 1941 BULLET Monster_Warbird_B 19 Tries_Out_Its_Wings Popular_Mechanics_September 1941 BULLET The_Douglas_B 19 a 1941 Flight article
Douglas XB-19