Projects cancelled after flight-testing began.
See also: Category:Abandoned military aircraft projects of the United States
All items (145)
A
B
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Martin 316
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Beechcraft XA-38 Grizzly
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Beechcraft XT-36
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Bell ARH-70 Arapaho
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Bell D-188A
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Bell P-76
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Bell XP-76
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Bell XP-52
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Bell XP-77
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Bell XP-83
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Bell YFM-1 Airacuda
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Boeing B-54
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Boeing C-127
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Boeing Vertol XCH-62
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Boeing X-20 Dyna-Soar
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Boeing X-46
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Boeing XB-55
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Boeing XB-56
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Boeing XB-59
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Boeing XP3B
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Boeing XPBB Sea Ranger
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Boeing Y1B-20
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Boeing–Sikorsky RAH-66 Comanche
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Boost-glide
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BQM-90
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Brewster XA-32
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Bristol XLRQ
C
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Cessna 308
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Columbia XJL
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Consolidated XP4Y Corregidor
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Consolidated XPB3Y
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Convair F2Y Sea Dart
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Convair Kingfish
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Convair X-6
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Convair XB-53
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Convair XP6Y
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Cornelius XBG-3
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Culver PQ-10
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Curtiss P-60
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Curtiss XP-18
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Curtiss XP-19
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Curtiss XP-71
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Curtiss XSB3C
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Curtiss-Wright XF-87 Blackhawk
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Curtiss-Wright XP-55 Ascender
D
F
G
L
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Lockheed AH-56 Cheyenne
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Lockheed CL-1200 Lancer
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Lockheed CL-400 Suntan
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Lockheed L-133
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Lockheed L-193
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Lockheed L-301
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Lockheed Martin FB-22
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Lockheed Martin RQ-3 DarkStar
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Lockheed Martin X-44 MANTA
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Lockheed P-7
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Lockheed Senior Prom
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Lockheed XB-30
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Lockheed XFM-2
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Lockheed XFV
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Lockheed XP-49
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Lockheed XV-4 Hummingbird
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Lockheed YF-12
M
N
P
V