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X-Planes
 The X-planes are a series of experimental United
States aircraft (and some rockets) used for testing of new technologies
and usually kept highly secret during development.
The first of these, the Bell X-1, became well-known
as the first plane to break the sound barrier, which it did in 1947.
Later X-planes yielded important research results, but only the North
American X-15 rocket plane of the early 1960s achieved comparable fame.
X-planes 7 through 12 were actually missiles, and some other vehicles
were unpiloted. Most X-planes are not expected to ever go into
full-scale production, and usually only a few are produced. One
exception is the Lockheed Martin X-35, which competed against the Boeing
X-32 to become the Joint Strike Fighter.
As of 2009, new X-plane projects are still
underway. The designation X-52 was skipped to avoid potential confusion
with the operational B-52 Stratofortress strategic bomber.
** Information provided by Wikipedia **
X-PlanesX-1
X-2 Starbuster
X-3
Stiletto
X-4
Bantam
X-5
X-6
X-7
X-8
X-9 Shrike
X-10
X-11 Atlas-A
X-12 Atlas-B
X-13
Vertijet
X-14
X-15
X-16
X-17
X-18
X-19
X-20 Dyna-Soar
X-21
X-22
X-23 PRIME
X-24
X-25 Gyrocopter
X-26
X-28 Osprey
X-29
X-30 National Aerospace Plane
X-31
X-32 Joint Strike Fighter
X-33 VentureStar
X-34
X-35 Joint Strike Fighter
X-36
X-37
Future-X
X-38 Crew Return Vehicle
X-39 FATE
X-40
SMV
X-41 Common Aero Vehicle
X-42 Pop-Up Upper Stage
X-43 Hyper-X
X-44
MANTA
X-45 Unmanned Combat Air Vehicle
(UCAV)
X-46
X-47
Pegasus UCAV
X-48
X-49
X-50
Dragonfly
X-51
Scramjet Engine Demostrator -
WaveRider (SED-WR)
X-53
Active Aeroelastic Wing
X-55
Advanced Composite Cargo Aircraft (ACCA) |
XA series
XA-26
XA-26A
XA-26B
XA-31A
XA-31B
XA-31C
XA-32
XA-32A
XA-38
Grizzly
XA-41
XB series
XB-25E
XB-25F
XB-25G
XB-27D
XB-26H
XB-27
XB-28
XB-29
XB-30
XB-31
XB-32 Dominator
XB-33
XB-33A Super Marauder
XB-35
XB-36
XB-38
XB-39
XB-40
XB-41
XB-42 Mixmaster
XB-43 Jetmaster
XB-44
XB-45 Tornado
XB-46
XB-47 Stratojet
XB-48
XB-49
XB-51
XB-52
XB-53
XB-55
XB-58 Hustler
XB-59
XB-60
XB-68
XB-70 Valkyrie
XC Series
XC-142
XF Series
XF-81
XF-83
XF-84H Thunderscreech
XF-85 Goblin
XF-87 Blackhawk
XF-88
XF-89
XF-90
XF-91 Thunderceptor
XF-92
XF-103 Thunderwarrior
XF-104
XF-108
XF-109
XP Series
XP-76
XP-77
XP-78
XP-79 Flying Ram |
US Non-X Designations
Boeing Bird of Prey
Boeing Skyfox
Douglas D-588-I Skystreak
Douglas D-588-II Skyrocket
FALCON
Goodyear Inflatoplane
Lockheed Have Blue
NASA M2-F1
Northrop HL-10
Northrop M2-F2
Northrop M2-F3
Northrop Tacit Blue
Scaled Composites Boomerang
Scaled Composites Proteus
United Kingdom
Armstrong Whitworth A.W.52
Avro 707
Blackburn B-20
Boulton Paul P.111
Boulton Paul P.120
Bristol 188
Bristol Brabazon
British Aerospace EAP
de Havilland Swallow
English Electric P1A
Fairey Delta 1
Fairey Delta 2
Fairey Rotodyne
General Aircraft GAL.56
Gloster E.28/39
Handley Page Manx
Handley Page HP.88
Handley Page HP.115
Hawker P.V.4
Hawker Hotspur
Hawker P.1072
Hawker P.1052
Hawker P.1081
Hawker P.1127
Miles Libellula
Saunders-Roe SR.A/1
Saunders-Roe SR.53
Saunders-Roe SR.177
Short Shetland
Short Sperrin
Short SB.1
Short SB5
Short Sherpa
Short SC.1
TSR-2
Westland-Hill Pterodactyl
Others
Avro Canada Avrocar
EADS Hypersonic Technology Vehicle
EADS Small Launch Vehicle
EADS Hypersonic Cruise Vehicle
FanWing
Helios Prototype
HiMAT
Nord 1500 Griffon
Solar Impulse Project | 
