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Prototype aircraft that were built but did not recieve a production contract.
Bell YFM-1 Airacuda
North American XB-21
World War II: 1939-1945:
Beech XA-38 Grizzly
Bell XP-76
Bell XP-77 Lightweight Fighter
Bell XP-83 Jet Fighter
Boeing XB-15
Boeing XB-38 Flying Fortress
Boeing XB-39 Superfortress
Consolidated-Vultee XA-41
Consolidated-Vultee XP-81
Curtiss XA-43/XP-87 Blackhawk
Curtiss XP-46
Curtiss-Wright XP-55 Ascender
Curtiss-Wright XP-60
Curtiss XP-62
Curtiss XP-87 Blackhawk
Douglas XA-42 Mixmaster
Douglas XB-42 Mixmaster
Fisher XP-75 Eagle
Grumman XP-50
Lockheed XP-58 Chain Lightning
McDonnell XP-67
North American XB-28
Northrop XP-56
Northrop XP-79B
Republic XP-72
Ryan FR-1 Fireball
Ryan YO-51 Dragonfly
Vultee XP-54
U.S.A.A.F. RESOURCE CENTER > EXPERIMENTAL > PREVIOUS PAGE