Northrop_YB 49 Northrop_YB 49 là một mẫu thử máy_bay ném bom hạng nặng được hãng Northrop_Corporation phát_triển ngay sau Chiến_tranh thế_giới II cho Không_quân Hoa_Kỳ Tham_khảo Tài_liệu BULLET Coleman_Ted_Jack_Northrop and the Flying_Wing_The_Real Story_Behind the Stealth_Bomber_New_York Paragon_House 1988 ISBN 1 55778 079 X BULLET Donald_David editor Northrop_Flying_Wings_Encyclopedia of World_Aircraft_Etobicoke_Ontario Prospero_Books 1997 ISBN 1 85605 375 X BULLET Fitzsimons_Bernard ed Scorpion_Northrop_F 89 Illustrated_Encyclopedia of 20th Century_Weapons and Warfare_Volume 21 London_Phoebus 1978 ISBN 0 8393 6175 0 BULLET Maloney_Edward_T_Northrop Flying_Wings_Corona del Mar_California Chiến_tranh thế_giới II Publications 1988 ISBN 0 915464 00 4 BULLET O Leary_Michael_Wings of Northrop_Conclusion_Air_Classics Volume 44 Number 3 March 2008 Challenge_Publications_Inc_ISSN 0002 2241 Heavily illustrated authoritative YB 49 article BULLET Pape_Garry and John_Campbell_Northrop_Flying Wings_A_History of Jack_Northrop s Visionary_Aircraft_Atglen_Pennsylvania Schiffer_Publishing_Ltd 1995 ISBN 0 88740 689 0 BULLET Pattillo_Donald_M_Pushing the Envelope_The_American_Aircraft Industry_Ann_Arbor_Michigan University of Michigan_Press 2001 ISBN 0 472 08671 5 BULLET Winchester_Jim_Northrop_XB 35 YB 49 Concept_Aircraft_Prototypes_X Planes and Experimental_Aircraft_Kent_UK Grange_Books plc 2005 ISBN 978 1 84013 809 2 BULLET Withington_Thomas and Chris_Davey_B 2A Spirit_Units in Combat_Oxford_UK_Osprey Publishing 2006 ISBN 1 84176 993 2 BULLET Wooldridge_E_T_Winged Wonders_The_Story of the Flying_Wings_Washington_D C Smithsonian_Institution_Press 1983 ISBN 0 87474 966 2 Liên_kết ngoài BULLET The_Crash of the YB 49 Flying_Wing_BULLET_History of the Flying_Wing_BULLET_Northrop Claims_AF scuttled flying wing
Northrop YB-49