List of military aircraft of the United States

This list of military aircraft of the United States includes prototype, pre-production and operational types. For aircraft in service, see the List of active United States military aircraft. Prototypes are normally prefixed with "X" and are often unnamed (note that these are not the same as the experimental X-planes, which are not generally expected to go into production), while pre-production models are usually prefixed with "Y".

The United States military employs a designation and naming system to provide identifications to all aircraft types. Until 1962, the United States Army, United States Air Force (formerly Army Air Force), and United States Navy all maintained separate systems. In September 1962,^[1] these were unified into a single system heavily reflecting the Air Force method. For more complete information on the workings of this system, refer to United States Department of Defense Aerospace Vehicle Designations.

This list does not include aircraft used by the U.S. military services prior to the establishment of a numerical designation system. For these aircraft, see List of military aircraft of the United States (1909-1919). It also does not include aircraft designated under the pre-1962 United States Navy designation system. For these aircraft, see List of military aircraft of the United States (naval).

A collection of NASA experimental aircraft, including (clockwise from left) the X-31, F-15S/MTD, SR-71, F-106, F-16XL, X-38, Radio Controlled Mothership, and X-36.

1 Prior to 1919
2 Army Air Service, 1919-1924
3 Army Air Corps/Army Air Forces/Air Force 1924-1962
4 Army, 1956-1962
5 Unified System, 1962-present
6 Un-designated foreign aircraft operated by the United States
7 See also
8 References
9 External links

Prior to 1919

Main article: List of military aircraft of the United States (1909-1919)

Prior to 1919, all planes flown by the Army Air Service and the Navy were referred to by the designation given to them by their manufacturer. A variety of both domestic and foreign types were operated, with the latter being the primary front-line types during the First World War.

Army Air Service, 1919-1924

Curtiss PW-8

In September 1919, the Army Air Service decided that it needed an organized designation sequence, and adopted fifteen classifications, designated by roman numerals. Several other unnumbered designations were added later. Each designation was assigned an abbreviation, and each design a number within that abbreviation. Variants were designated by alphabetically appending letters to the design number.

Type O: Foreign-Built Pursuit Aircraft

Fokker D.VII - Fokker
Fokker D.VIII - Fokker

Type I: Pursuit, water-cooled

PW-1 - Engineering Division
PW-2 - Loening
PW-3 - Orenco
PW-4 - Gallaudet
PW-5 - Fokker
PW-6 - Fokker
PW-7 - Fokker
PW-8 - Curtiss
PW-9 - Boeing

Type II: Pursuit, night

PN-1 - Curtiss

Type III: Pursuit, air-cooled

PA-1 - Loening

Type IV: Pursuit, ground attack, 1922

PG-1 - Aeromarine

Type V: Two-seat pursuit

TP-1 - Engineering Division

Type VI: Ground attack, 1920-1922

GA-1 - Boeing
GA-2 - Boeing

Type VII: Infantry liaison

IL-1 - Orenco

Type VIII: Night observation

NO-1 - Douglas
NO-2 - Douglas

Type IX: Artillery observation

AO-1 - Atlantic

Type X: Corps observation

CO-1 - Engineering Division
CO-2 - Engineering Division
CO-3 - Engineering Division
CO-4 - Atlantic
CO-5 - Engineering Division
CO-6 - Engineering Division
CO-7 - Boeing
CO-8 - Atlantic

Type XI: Day bombardment

DB-1 - Gallaudet

Type XII: Night bombardment, short range

NBS-1 - Martin (originally designated MB-2)
NBS-2 - Lowe-Willard-Fowler
NBS-3 - Elias
NBS-4 - Curtiss

Type XIII: Night bombardment, long range

NBL-1 - Witteman-Lewis
NBL-2 - Martin

Type XIV: Trainer, air-cooled

TA-1 - Elias
TA-2 - Huff-Daland
TA-3 - Dayton-Wright Aircraft
TA-4 - Engineering Division
TA-5 - Dayton-Wright Aircraft
TA-6 - Huff-Daland

Type XV: Trainer, water-cooled

TW-1 - Engineering Division
TW-2 - Cox-Klemin
TW-3 - Dayton-Wright Aircraft
TW-4 - Fokker
TW-5 - Huff-Daland

Ambulance, 1919-1924

A-1 - Cox-Klemin
A-2 - Fokker

Messenger

M-1 - Engineering Division/Sperry

Pursuit, special

PS-1 - Dayton-Wright

Racer

Verville-Sperry R-3

R-1 - Alfred V. Verville
R-2 - Thomas-Morse
R-3 - Verville-Sperry
R-4 - Loening
R-5 - Thomas-Morse
R-6 - Curtiss
R-7 - Engineering Division
R-8 - Curtiss

Seaplane

S-1 - Loening

Transport

T-1 - Martin
T-2 - Fokker
T-3 - Lowe-Willard-Fowler

Army Air Corps/Army Air Forces/Air Force 1924-1962

A-3 Falcon

Attack, 1924-1948

- A-1 - skipped to prevent confusion with Cox-Klemin XA-1
A-2 - Douglas
A-3 Falcon - Curtiss
A-4 Falcon - Curtiss
A-5 Falcon - Curtiss
A-6 Falcon - Curtiss
A-7 - Fokker
A-8 - Curtiss
A-9 - Lockheed
A-10 Shrike - Curtiss
A-11 - Consolidated
A-12 Shrike - Curtiss
A-13 - Northrop
A-14 - Curtiss
A-15 - Martin
A-16 - Northrop
A-17 Nomad - Northrop
A-18 Shrike - Curtiss
A-19 - Vultee
A-20 Havoc - Douglas (redesignated as B-20 in 1948)

A-20 Havoc
A-21 - Stearman
A-22 - Martin
A-23 Baltimore - Martin
A-24 Banshee - Douglas (redesignated as F-24 in 1948)
A-25 Shrike - Curtiss
A-26 Invader - Douglas (redesignated as B-26 in 1948, then as A-26 in 1966)
A-27 - North American
A-28 Hudson - Lockheed
A-29 Hudson - Lockheed
A-30 - Martin, to allow supply to the UK under Lend-lease
A-31 Vengeance - Vultee
A-32 - Brewster
A-33 - Douglas
A-34 - Brewster
A-35 Vengeance - Vultee
A-36 Apache/Invader - North American
A-37 - Hughes
A-38 Grizzly - Beechcraft
A-39 - Kaiser-Fleetwings
A-40 - Curtiss
A-41 - Vultee
A-42 Mixmaster - Douglas
A-43 Blackhawk - Curtiss-Wright
A-44 - Convair
A-45 - Martin

Bomber

Huff-Daland LB-1

Until 1926, the Army Air Service had three sequences for bombers. Light bombers were indicated by the LB- prefix, medium bombers by the B- prefix, and heavy bombers by the HB- prefix. In 1926, the three-category system was scrapped and all bombers subsequently built were placed in the B- sequence.

Light Bomber, 1924-1926

LB-1 - Huff-Daland (later Keystone)
LB-2 - Atlantic Aircraft Corporation (Fokker Aircraft Corp after 1925)
LB-3 - Keystone
- Martin LB-4 - S/n assigned but prototype not built
LB-5 - Keystone
LB-6 - Keystone
LB-7 - Keystone
LB-8 - Keystone
LB-9 - Keystone
LB-10 - Keystone
LB-11 - Keystone
LB-12 - Keystone
LB-13 - Keystone
LB-14 - Keystone

Medium Bomber, 1924-1926

B-1 - Huff-Daland
B-2 Condor - Curtiss

Heavy Bomber, 1924-1926

HB-1 - Huff-Daland
HB-2 - Atlantic/Fokker
HB-3 - Huff-Daland

Unified bomber sequence, 1926-1962

Martin B-10B

B-1 - Huff-Daland/Keystone
B-2 Condor - Curtiss
B-3 - Keystone
B-4 - Keystone
B-5 - Keystone
B-6 - Keystone
B-7 - Douglas
B-8 - Fokker
B-9 - Boeing
B-10 - Martin
B-11 - Douglas
B-12 - Martin
B-13 - Martin
B-14 - Martin
B-15 - Boeing
B-16 - Martin
B-17 Flying Fortress - Boeing
B-18 Bolo - Douglas
B-19 - Douglas
B-20 - Boeing
B-20 Havoc - Douglas - designation of A-20 Havoc from 1948 to 1949
B-21 - North American
B-22 - Douglas
B-23 Dragon - Douglas
B-24 Liberator - Consolidated

B-24 Liberator
B-25 Mitchell - North American
B-26 Marauder - Martin
B-26 Invader - Douglas - designation of A-26 Invader from 1948 to 1966
B-27 - Martin
B-28 Dragon - North American
B-29 Superfortress - Boeing
B-30 - Lockheed
B-31 - Douglas
B-32 Dominator - Consolidated
B-33 Super Marauder - Martin
B-34 Lexington - Lockheed
B-35 - Northrop
B-36 Peacemaker - Convair
B-37 - Lockheed
B-38 Flying Fortress - Boeing
B-39 Superfortress - Boeing
B-40 Flying Fortress - Boeing
B-41 Liberator - Consolidated
B-42 Mixmaster - Douglas
B-43 Jetmaster - Douglas
B-44 Superfortress - Boeing
B-45 Tornado - North American
B-46 - Convair
B-47 Stratojet - Boeing
B-48 - Martin
B-49 - Northrop
B-50 Superfortress - Boeing
B-51 - Martin
B-52 Stratofortress - Boeing

JB-52E Stratofortress
B-53 - Convair
B-54 - Boeing
B-55 - Boeing
B-56 - Boeing
B-57 Canberra - Martin
B-58 Hustler - Convair
B-59 - Boeing
B-60 - Convair
B-61 Matador - Martin (redesignated as TM-61, then MGM-1)
B-62 Snark - Northrop (redesignated as SM-62)
B-63 RASCAL - Bell (redesignated as GAM-63)
B-64 Navaho - North American (redesignated as SM-64)
B-65 Atlas - Convair (redesignated as SM-65)
B-66 Destroyer - Douglas
B-67 Crossbow - Radioplane (redesignated as GAM-67)
B-68 - Martin
B-68 Titan - Martin (redesignated as SM-68)
B-69 Neptune - Lockheed
B-70 Valkyrie - North American
SR-71 Blackbird - Lockheed (SR- denotes "strategic reconnaissance")

Beginning with #69, the "M-" (missile) and "B-" (bomber) series diverged. The missles designated M-69 to M-92, some of which are incorrectly labeled as "formerly designated B-xx" in some sources, never used a "B-" series designation.

Bomber, long range, 1935-1936

A short-lived designation used from 1935-1936 to refer to three long-range bomber projects commissioned by the Army Air Corps.

BLR-1 - Boeing (redesignated as XB-15)
BLR-2 - Douglas (redesignated as XB-19)
BLR-3 - Sikorsky

Cargo, 1924-1962

Douglas C-1 refueling Fokker C-2

C-1 - Douglas
C-2 - Fokker
C-3 - Ford
C-4 - Ford
C-5 - Fokker
C-6 - Sikorsky
C-7 - Fokker
C-8 - Fairchild
C-9 - Ford
C-10 Robin - Curtiss-Wright
C-11 Fleetster - Consolidated
C-12 Vega - Lockheed
- C-13 - skipped
C-14 - Fokker
C-15 - Fokker
C-16 - Fokker
C-17 Super Vega - Lockheed
C-18 Monomail - Boeing
C-19 Alpha - Northrop
C-20 - Fokker
C-21 Dolphin - Douglas
C-22 Fleetster - Consolidated
C-23 Altair - Lockheed
C-24 - American
C-25 Altair - Lockheed
C-26 Dolphin - Douglas
C-27 Airbus - Bellanca
C-28 - Sikorsky

Sikorsky C-28
C-29 Dolphin - Douglas
C-30 Condor - Curtiss-Wright
C-31 - Kreider-Reisner
C-32 - Douglas
C-33 - Douglas
C-34 - Douglas
C-35 Electra - Lockheed
C-36 Electra - Lockheed
C-37 Electra - Lockheed
C-38 - Douglas
C-39 - Douglas
C-40 Electra - Lockheed
C-41 - Douglas
C-42 - Douglas
C-43 Traveller - Beechcraft
C-44 - Messerschmitt
C-45 Expeditor - Beechcraft
C-46 Commando - Curtiss-Wright
C-47 Skytrain - Douglas

C-47 Skytrain
C-48 Skytrain - Douglas
C-49 Skytrain - Douglas
C-50 Skytrain - Douglas
C-51 Skytrain - Douglas
C-52 Skytrain - Douglas
C-53 Skytrooper - Douglas
C-54 Skymaster - Douglas
C-55 Commando - Curtiss-Wright
C-56 Lodestar - Lockheed
C-57 Lodestar - Lockheed
C-58 Bolo - Douglas
C-59 Lodestar - Lockheed
C-60 Lodestar - Lockheed
C-61 Forwarder - Fairchild
C-62 - Waco
C-63 Hudson - Lockheed
C-64 Norseman - Noorduyn
C-65 Skycar - Stout
C-66 Lodestar - Lockheed
C-67 Dragon - Douglas
C-68 - Douglas
C-69 Constellation - Lockheed
C-70 Nightingale - Howard
C-71 Executive - Spartan
C-72 - Waco
C-73 - Boeing
C-74 Globemaster - Douglas

C-74 Globemaster
C-75 - Boeing
C-76 Caravan - Curtiss-Wright
C-77 - Cessna
C-78 Bobcat - Cessna
C-79 - Junkers
C-80 - Harlow
C-81 Reliant - Stinson
C-82 Packet - Fairchild
C-83 Coupe - Piper
C-84 - Douglas
C-85 Orion - Lockheed
C-86 Forwarder - Fairchild
C-87 Liberator Express - Consolidated
C-88 - Fairchild
C-89 - Hamilton
C-90 - Luscombe
C-91 - Stinson
C-92 - Akron-Funk
C-93 Conestoga - Budd
C-94 - Cessna
C-95 Grasshopper - Taylorcraft
C-96 - Fairchild
C-97 Stratofreighter - Boeing

C-97 Stratofreighter
- KC-97 Stratotanker - Boeing
C-98 Clipper - Boeing
C-99 - Convair
C-100 Gamma - Northrop
C-101 Vega - Lockheed
C-102 Speedster - Rearwin
C-103 - Grumman
C-104 - Lockheed
C-105 - Boeing
C-106 - Cessna
C-107 Skycar - Stout
C-108 Flying Fortress - Boeing
C-109 Liberator Express - Consolidated
C-110 - Douglas
C-111 Super Electra - Lockheed
C-112 - Douglas
C-113 Commando - Curtiss-Wright
C-114 Skymaster - Douglas
C-115 Skymaster - Douglas
C-116 Skymaster - Douglas
C-117 Super Skytrain - Douglas
C-118 Liftmaster - Douglas
C-119 Flying Boxcar - Fairchild
C-120 Packplane - Fairchild
C-121 Constellation - Lockheed
- YC-121F Constellation - Lockheed
C-122 Avitruc - Chase
C-123 Provider - Fairchild
- XC-123A - Chase
C-124 Globemaster II - Douglas

From left to right: C-141, C-130, and C-124 with Mt. St. Helens in the background
C-125 Raider - Northrop
C-126 - Cessna
C-127 - Boeing
C-128 Flying Boxcar - Fairchild
C-129 Super Skytrain - Douglas
C-130 Hercules - Lockheed
C-131 Samaritan - Convair
C-132 - Douglas
C-133 Cargomaster - Douglas
C-134 - Stroukoff
C-135 Stratolifter - Boeing
- KC-135 Stratotanker - Boeing
C-136 - Fairchild
C-137 Stratoliner - Boeing
- C-138 - reserved for Fokker F27, but never assigned
C-139 - Lockheed
C-140 Jetstar - Lockheed
C-141 Starlifter - Lockheed
C-142 - Vought
- C-143 - reserved for what would become the X-19, but never officially assigned
C-143 MRC2A - Bombardier Challenger CL-604 for US Coast Guard Medium Range Command and Control Aircraft ^[2]
C-144 Ocean Sentry - CASA CN-235 300CG for US Coast Guard Medium Range Surveillance Maritime Patrol Aircraft (MRS MPA)^[2]

Drone

Culver PQ-8A

Aerial Target

1940-1941

A-1 - Fleetwings
A-2 - Radioplane
A-3 - Curtiss
A-4 - Douglas
A-5 - Boeing
A-6 - Douglas
A-7 Airacobra - Bell
A-8 Cadet - Culver

1942-1948

PQ-8 Cadet - Culver
PQ-9 - Culver
PQ-10 - Culver
PQ-11 - Fletcher
PQ-12 - Fleetwings
PQ-13 - ERCO
PQ-14 Cadet - Culver
PQ-15 - Culver

Aerial Target (Model Airplane), 1942-1948

Radioplane OQ-2A

OQ-2 - Radioplane
OQ-3 - Radioplane/Frankfort
OQ-4 - Brunswick-Balke-Collender
OQ-5 - contractor unknown
OQ-6 - Radioplane
OQ-7 - Radioplane
OQ-11 - Simmonds Aerocessories
OQ-12 - Radioplane
OQ-13 - Radioplane
OQ-14 - Radioplane/Frankfort
OQ-16
OQ-17 - Radioplane
OQ-18
OQ-19 Quail - Radioplane

Controllable bomb, 1942-1945

BQ-1 - Fleetwings
BQ-2 - Kaiser-Fleetwings
BQ-3 - Fairchild
BQ-3 - Fairchild
BQ-4 - Interstate
BQ-5 - Interstate
BQ-6 - Interstate
BQ-7 Aphrodite - Boeing
BQ-8 Liberator - Consolidated^[3]

Target Control, 1942-1948

CQ-1 - Fletcher
CQ-2 - Stinson
CQ-3 Expeditor - Beechcraft
CQ-4 Flying Fortress - Boeing

Unified sequence, 1948-1962

Q-1 - Radioplane
Q-2 Firebee - Ryan
Q-3 - Radioplane
Q-4 - Northrop
Q-5 Kingfisher - Lockheed
Q-6 - Wright Air Development Center
- Q-7 - skipped: request for redesignation of QB-17 not approved
Q-8 Cadet Culver
- Q-8 - request for redesignation of QF-80 not approved
Q-9 - WADC
Q-10 - Radioplane
Q-11 - WADC
Q-12 - Beechcraft
Q-14 Cadet - Culver

Glider

Assault Glider, 1942-1944

AG-1 - Christopher
AG-2 - Timm

Bomb Glider, 1942-1944

BG-1 - Fletcher
BG-2 - Fletcher
BG-3 - Cornelius

Cargo Glider, 1941-1948

Waco CG-4A

CG-1 - Frankfort
CG-2 - Frankfort
CG-3 - Waco
CG-4 Hadrian - Waco
CG-5 - St. Louis
CG-6 - St. Louis
CG-7 - Bowlus-DuPont/Douglas
CG-8 - Bowlus-DuPont/Douglas
CG-9 - AGA Aviation
CG-10 Trojan Horse - Laister-Kauffman
CG-11 - Snead
CG-12 - Read-York
CG-13 - Waco
CG-14 - Chase
CG-15 Hadrian - Waco
CG-16 - General Airborne Transport
CG-17 - Douglas
CG-18 - Chase
CG-19 - Douglas
CG-20 - Chase

Fuel Glider, 1930-1948

FG-1 - Cornelius

Powered Glider, 1943-1948

PG-1 - Northwestern
PG-2 - Ridgefield
PG-3 - Waco

Training Glider, 1941-1948

Schweitzer TG-3A

TG-1 - Frankfort
TG-2 - Schweizer
TG-3 - Schweizer
TG-4 - Laister-Kauffman
TG-5 Grasshopper - Aeronca
TG-6 Grasshopper - Taylorcraft
TG-7 Orlik - Kocjan
TG-8 Grasshopper - Piper
TG-9 - Briegleb
TG-10 - Wichita Engineering
TG-11 - Schempp-Hirth
TG-12 - Bowlus-DuPont
TG-13 - Briegleb
TG-14 - Stiglmeier
TG-15 - Franklin-Stevens
TG-16 - Schultz
TG-17 - Franklin
TG-18 - Midwest Sailplane
TG-19 - Jacobs-Schweyer
TG-20 - Laister-Kauffman
TG-21 - Notre Dame
TG-22 - Mehlhose
TG-23 - Harper-Corcoran
TG-24 - Bowlus-Dupont
TG-25 Plover - Wolcott
TG-26 - Universal
TG-27 - Schneider
TG-28 Hawk Junior - Haller
TG-29 - Volmer Jensen
TG-30 Bluebird - Smith
TG-31 - Aero Industries
TG-32 - Pratt-Read
TG-33 - Aeronca

Unified sequence, 1948-1955

G-2 - Ridgefield
G-3 - Waco
G-4 Hadrian - Waco
G-10 Trojan Horse - Laister-Kauffman
G-13 - Waco
G-14 - Chase
G-15 Hadrian - Waco
G-18 - Chase
G-20 - Chase

Sailplane, 1960-1962

S-1 - Schweizer
S-2 - Schweizer

Gyroplane, 1935-1939

G-1 - Kellett
G-2 - Pitcairn

Liaison, 1942-1962

L-1 Vigilant - Stinson
L-2 Grasshopper - Taylorcraft
L-3 Grasshopper - Aeronca
L-4 Grasshopper - Piper
L-5 Sentinel - Stinson (redesignated as U-19 in 1962)
L-6 Grasshopper - Interstate
L-7 - Universal
L-8 Cadet - Interstate
L-9 - Stinson
L-10 - Ryan
L-11 - Bellanca
L-12 Reliant - Stinson
L-13 - Stinson/Convair
L-14 Cub - Piper
L-15 Scout - Boeing
L-16 Champion - Aeronca
L-17 Navion - North American/Ryan (redesignated as U-18 in 1962)
L-18 Super Cub - Piper
L-19 Bird Dog - Cessna (redesignated as O-1 in 1962)
L-20 Beaver - de Havilland Canada (redesignated as U-6 in 1962)
L-21 Super Cub - Piper (redesignated as U-7 in 1962)
L-22 Navion - Ryan
L-23 Seminole - Beechcraft (redesignated as U-8 in 1962)
L-24 Courier - Helio (redesignated as U-24 in 1962)
L-25 - McDonnell (redesignated as XH-35, then XV-1)
L-26 Commander - Aero Design (redesignated as U-4 and U-9 in 1962)
L-27 - Cessna (redesignated as U-3 in 1962)
L-28 Super Courier - Helio (redesignated as U-10 in 1962)

Pursuit, 1924-1948/Fighter, 1948-1962

P-3 Hawk

Designated P- for "pursuit" until 1948, when the United States Air Force was founded. After this, all P- designations were changed to F- ("fighter"), but the original numbers were retained.

P-1 Hawk - Curtiss
P-2 Hawk - Curtiss
P-3 Hawk - Curtiss
P-4 - Boeing
P-5 Hawk - Curtiss
P-6 Hawk - Curtiss
P-7 - Boeing
P-8 - Boeing
P-9 - Boeing
P-10 - Curtiss
P-11 Hawk - Curtiss
P-12 - Boeing
P-13 Viper - Thomas-Morse
P-14 - Curtiss
P-15 - Boeing
P-16 - Berliner-Joyce
P-17 Hawk - Curtiss
P-18 - Curtiss
P-19 - Curtiss
P-20 - Curtiss
P-21 - Curtiss
P-22 Hawk - Curtiss
P-23 Hawk - Curtiss
P-24 - Lockheed
P-25 - Consolidated
P-26 Peashooter - Boeing

Boeing P-26
P-27 - Consolidated
P-28 - Consolidated
P-29 - Boeing
P-30 - Consolidated
P-31 Swift - Curtiss
P-32 - Boeing
P-33 - Consolidated
P-34 - Wedell-Williams
P-35 - Seversky
P-36 Hawk - Curtiss
P-37 - Curtiss
P-38 Lightning - Lockheed
P-39 Airacobra - Bell
P-40 Warhawk - Curtiss
P-41 - Seversky
P-42 - Curtiss
P-43 Lancer - Republic
P-44 Rocket - Republic
P-45 - Bell
P-46 - Curtiss
P-47 Thunderbolt - Republic
P-48 - Douglas
P-49 - Lockheed
P-50 - Grumman
P-51 Mustang - North American

P-51H Mustang
P-52 - Bell
P-53 - Curtiss
P-54 Swoose Goose - Vultee
P-55 Ascender - Curtiss
P-56 Black Bullet - Northrop
P-57 Peashooter - Tucker
P-58 Chain Lightning - Lockheed
P-59 Airacomet - Bell
P-60 - Curtiss
P-61 Black Widow - Northrop
P-62 - Curtiss
P-63 Kingcobra - Bell
P-64 - North American
P-65 - Grumman
P-66 Vanguard - Vultee
P-67 Bat - McDonnell
P-68 Tornado - Vultee
P-69 - Republic
P-70 Nighthawk - Douglas
P-71 - Curtiss
P-72 - Republic
P-73 - Hughes (officially never assigned)
- P-74 - skipped
P-75 Eagle - Fisher
P-76 - Bell
P-77 - Bell
P-78 - North American
P-79 Flying Ram - Northrop
F-80 Shooting Star - Lockheed
P-81 - Convair
F-82 Twin Mustang - North American
P-83 - Bell
F-84 Thunderjet - Republic
F-85 Goblin - McDonnell
F-86 Sabre - North American

F-86F Sabre
F-87 Blackhawk - Curtiss
F-88 Voodoo - McDonnell
F-89 Scorpion - Northrop
F-90 - Lockheed
F-91 Thunderceptor - Republic
F-92 - Convair
F-93 - North American
F-94 Starfire - Lockheed
F-95 - North American
F-96 - Republic
F-97 Starfire - Lockheed (redesignated as F-94C Starfire)
F-98 Falcon - Hughes (redesignated as GAR-1, then AIM-4)
F-99 BOMARC - Boeing (redesignated as IM-99, then CIM-10)
F-100 Super Sabre - North American
F-101 Voodoo - McDonnell
F-102 Delta Dagger - Convair
F-103 - Republic
F-104 Starfighter - Lockheed
F-105 Thunderchief - Republic
F-106 Delta Dart - Convair
F-107 - North American
F-108 Rapier - North American
- F-109 - designation was reserved for the X-13 Vertijet, F-101B,^[4] and Bell D-188A, but never officially assigned
  
  General Dynamics F-111
F-110 Spectre - McDonnell Douglas (redesignated as F-4 in 1962)
F-111 Aardvark - General Dynamics
- Unofficial designations YF-112 and up were later assigned to "black" projects - see Fighter series in Unified System.

Fighter, Multiplace

FM-1 Airacuda - Bell
FM-2 - Lockheed

Pursuit, Biplace

PB-1 - Berliner-Joyce
PB-2 - Consolidated
PB-3 - Lockheed

Observation

Observation, 1924-1942

O-1 Falcon - Curtiss
O-2 - Douglas
O-3 Mohawk - Dayton-Wright
O-4 - Martin
O-5 - Douglas
O-6 - Thomas-Morse
O-7 - Douglas
O-8 - Douglas
O-9 - Douglas
O-10 - Loening
O-11 Falcon - Curtiss
O-12 Falcon - Curtiss
O-13 Falcon - Curtiss
O-14 - Douglas
O-15 - Keystone
O-16 Falcon - Curtiss
O-17 Courier - Consolidated
O-18 Falcon - Curtiss
O-19 - Thomas-Morse
O-20 - Thomas-Morse
O-21 - Thomas-Morse
O-22 - Douglas
O-23 - Thomas-Morse
O-24 - Curtiss
O-25 - Douglas
O-26 - Curtiss
O-27 - Fokker
O-28 Corsair - Vought
O-29 - Douglas
O-30 - Curtiss
O-31 - Douglas
O-32 - Douglas
O-33 - Thomas-Morse
O-34 - Douglas
O-35 - Douglas
O-36 - Douglas
O-37 - Keystone
O-38 - Douglas
O-39 Falcon - Curtiss
O-40 Raven - Curtiss
O-41 - Thomas-Morse
O-42 - Thomas-Morse
O-43 - Douglas
O-44 - Douglas
O-45 - Martin
O-46 - Douglas
O-47 - North American
O-48 - Douglas
O-49 Vigilant - Stinson (redesignated as L-1 in 1942)
O-50 - Bellanca
O-51 Dragonfly - Ryan

YO-51 Dragonfly
O-52 Owl - Curtiss
O-53 Havoc - Douglas
O-54 - Stinson
O-55 - ERCO
O-56 Ventura - Lockheed
O-57 Grasshopper - Taylorcraft (redesignated as L-2 in 1942)
O-58 Grasshopper - Aeronca (redesignated as L-3 in 1942)
O-59 Grasshopper - Piper (redesignated as L-4 in 1942)
O-60 - Kellett
O-61 - Pitcairn
O-62 Sentinel - Stinson (redesignated as L-5 in 1942)
O-63 Grasshopper - Interstate (redesignated as XL-6 in 1942)

Observation amphibian, 1925-1948

OA-1 - Loening
OA-2 - Loening
OA-3 Dolphin - Douglas
OA-4 Dolphin - Douglas
OA-5 - Douglas
OA-6 - Consolidated
OA-7 - Douglas
OA-8 - Sikorsky
OA-9 Goose - Grumman
OA-10 Catalina - Consolidated
OA-11 - Sikorsky
OA-12 Duck - Grumman
OA-13 Goose - Grumman
OA-14 Widgeon - Grumman
OA-15 Seabee - Republic

Reconnaissance

Photographic reconnaissance, 1930-1948 / Reconnaissance, 1948-1962

F-1 - Fairchild
F-2 Expeditor - Beechcraft
F-3 Havoc - Douglas
F-4 Lightning - Lockheed
F-5 Lightning - Lockheed
F-6 Mustang - North American
F-7 Liberator - Consolidated
F-8 Mosquito - de Havilland
F-9 Flying Fortress - Boeing
F-10 Mitchell - North American
F-11 - Hughes
F-12 Rainbow - Republic
F-13 Superfortress - Boeing
F-14 Shooting Star - Lockheed
F-15 Reporter - Northrop
R-11 - Hughes
R-12 Rainbow - Republic
R-16 Stratofortress - Boeing^[5]

Reconnaissance-strike, 1960-1962

Both of the following aircraft are numbered in the B- (bomber) sequence.

RS-70 Valkyrie - North American
RS-71 Blackbird - Lockheed

Rotary wing 1941–1948 and helicopter 1948–present

In 1941, the category letter R- was allotted for "rotary wing" aircraft, and this designation was used until the founding of the United States Air Force in 1947, at which point the category letter was changed to H-, for "helicopter". However, the original numbering sequence was retained.

In 1962 when the Unified Designation System was adopted, six former Navy and Army types received new designations in the H-1 to H-6 series, which can be found here. However, the original sequence was also continued, and remains in use to the present, with the next designation available being H-73.

R-1 - Platt-LePage
R-2 - Kellett
R-3 - Kellett
R-4 Hoverfly - Sikorsky
R-5/H-5 Dragonfly - Sikorsky
R-6 Hoverfly II - Sikorsky
R-7 - Sikorsky
XR-8 Kellett
R-9/H-9 - Firestone
R-10/H-10 - Kellett
R-11/H-11 - Rotorcraft
R-12/H-12 - Bell
R-13/H-13 Sioux - Bell
R-14 - Firestone
R-15/H-15 - Bell
R-16/H-16 - Piasecki
XR-17/XH-17 - Hughes/Kellett
YH-18 - Sikorsky
H-19 - Sikorsky
XH-20 Little Henry - McDonnell
H-21 - Piasecki
H-22 - Kaman
OH-23 Raven - Hiller
YH-24 - Seibel
H-25 - Piasecki
XH-26 Jet Jeep - American Helicopter
YH-27 Transporter - Piasecki
XH-28 - Hughes
H-29 - McDonnell
YH-30 - McCulloch
YH-31 - Doman
YH-32 - Hiller
XH-33 - Bell (redesignated as XV-3)
H-34 Choctaw - Sikorsky
XH-35 - McDonnell (redesignated as XV-1)
H-36 - reserved for secret project LONG EARS
H-37 Mojave - Sikorsky
H-38 - reserved for secret project SHORT TAIL
XH-39 - Sikorsky
XH-40 - Bell
YH-41 Seneca - Cessna
XH-42 - Hughes
H-43 Huskie - Kaman
H-44 - reserved for secret project BIG TOM
H-45 - reserved for secret project STEP CHILD
H-46 Sea Knight - Boeing Vertol
H-47 Chinook - Boeing Vertol
XH-48 - Bell (redesignated as UH-1F)
XH-49 - Boeing Vertol (redesignated as XCH-46B)
H-50 DASH - Gyrodyne

Lockheed XH-51

XH-51 - Lockheed
H-52 Sea Guard - Sikorsky
H-53 - Sikorsky
- MH-53 Pave Low
- CH-53E Super Stallion
  - CH-53K Super Stallion ^[2]
H-54 Tarhe - Sikorsky
H-55 Osage - Hughes
H-56 Cheyenne - Lockheed
H-57 Sea Ranger - Bell
H-58 Kiowa - Bell
XH-59 - Sikorsky
H-60 Black Hawk - Sikorsky
- SH-60 Seahawk
- HH-60 Pave Hawk
- HH-60 Jayhawk
YH-61 - Boeing Vertol
XH-62 - Boeing Vertol
YH-63 Kingcobra - Bell
H-64 Apache - Hughes
H-65 Dolphin - Aérospatiale
H-66 Comanche - Boeing/Sikorsky
H-67 Creek - Bell
H-68 Stingray - Agusta ^[2]
H-69 - skipped
H-70 - Bell ^[2]
H-71 Kestrel - Lockheed Martin ^[2]
H-72 Lakota - Eurocopter ^[2]

Supersonic/special test, 1946-1948

XS-1 - Bell
XS-2 - Bell
XS-3 Stiletto - Douglas
XS-4 Bantam - Northrop
XS-5 - Bell
- This series was continued as the X (Experimental) series after 1948 - see X-series in Unified System.

Trainer

Advanced Trainer, 1925-1948

AT-1 - Huff-Daland
AT-2 - Huff-Daland
AT-3 - Boeing
AT-4 Hawk - Curtiss
AT-5 Hawk - Curtiss
AT-6 Texan - North American (redesignated as T-6 in 1948)
AT-7 Navigator - Beechcraft (redesignated as T-7 in 1948)
AT-8 Bobcat - Cessna
AT-9 Jeep - Curtiss-Wright
AT-10 Wichita - Beechcraft
AT-11 Kansan - Beechcraft (redesignated as T-11 in 1948)
AT-12 Guardsman - Republic
AT-13 Gunner - Fairchild
AT-14 Gunner - Fairchild
AT-15 Crewmaker - Boeing
AT-16 - Noorduyn
AT-17 Bobcat - Cessna
AT-18 Hudson - Lockheed
AT-19 Reliant - Stinson
AT-20 Anson - Avro/Federal
AT-21 Gunner - Fairchild
AT-22 Liberator - Consolidated
AT-23 Marauder - Martin
AT-24 Mitchell - North American

Basic Combat, 1936-1940

BC-1 - North American
BC-2 - North American
BC-3 - Vultee

Basic Trainer, 1930-1948

BT-1 - Douglas
BT-2 - Douglas
BT-3 - Stearman
BT-4 - Curtiss
BT-5 - Stearman
BT-6 - Consolidated
BT-7 - Consolidated
BT-8 - Seversky
BT-9 - North American
BT-10 - North American
BT-11 - Aircraft Research
BT-12 - Fleetwings
BT-13 Valiant - Vultee
BT-14 - North American
BT-15 Valiant - Vultee
BT-16 Valiant - Vultee
BT-17 - Boeing-Stearman

Primary Trainer, 1925-1948

PT-1 Trusty - Consolidated
PT-2 Trusty - Consolidated
PT-3 Trusty - Consolidated
PT-4 Trusty - Consolidated
PT-5 Trusty - Consolidated
PT-6 - Consolidated
PT-7 Pinto - Mohawk
PT-8 - Consolidated
PT-9 - Stearman
PT-10 - Verville
PT-11 - Consolidated
PT-12 - Consolidated
PT-13 Kaydet - Boeing-Stearman
PT-14 - Waco
PT-15 - St. Louis
PT-16 - Ryan
PT-17 Kaydet - Boeing-Stearman
PT-18 Kaydet - Boeing-Stearman
PT-19 Cornell - Fairchild
PT-20 - Ryan
PT-21 Recruit - Ryan
PT-22 Recruit - Ryan
PT-23 Cornell - Fairchild
PT-24 Tiger Moth - de Havilland
PT-25 - Ryan
PT-26 Cornell - Fairchild
PT-27 Kaydet - Boeing-Stearman

Unified sequence, 1948-present

The AT-6 Texan, AT-7 Navigator, and AT-11 Kansan, were retroactively given T- designations. The new sequence began at 28, continuing the "PT-" numbering sequence.

T-6 Texan - North American
T-7 Navigator - Beechcraft
T-11 Kansan - Beechcraft
T-28 Trojan - North American
T-29 Flying Classroom - Convair
T-30 - Douglas
T-31 - Fairchild
T-32 - Convair
T-33 Shooting Star - Lockheed
T-34 Mentor - Beechcraft
T-35 Buckaroo - Temco
T-36 - Beechcraft/Canadair
T-37 Tweet - Cessna
T-38 Talon - Northrop
T-39 Sabreliner - North American
T-40 Jet Star - Lockheed
T-41 Mescalero - Cessna
T-42 Cochise - Beechcraft
T-43 - Boeing
T-44 Pegasus - Beechcraft
T-45 Goshawk - McDonnell Douglas/BAE Systems
T-46 - Fairchild
T-47 - Cessna
T-48 - Cessna
T-48 MPATS ^[2]
T-49 - Boeing ^[2]
T-50 Golden Eagle - Korean Aerospace Industries (designation reserved, none procured) ^[2]
T-51 - Cessna ^[2]
T-52 - Diamond Aircraft ^[6]

Convertiplane, 1952-1962

Sequence	Manufacturer	First flight	Notes/Notable Variants
V-1	McDonnell Aircraft	14 July 1954	Formerly L-25 Formerly H-35
V-2	Sikorsky Aircraft	-	Not built
V-3	Bell Helicopter	11 August 1955	Formerly H-33

Army, 1956-1962

AO-1 Mohawk

In 1956, the U.S. Army adopted a new, and relatively simple, designation system for its aviation assets. Aircraft were divided into three different types - 'A' for fixed-wing aircraft, 'H' for helicopters, or 'V' for V/STOL aircraft, and then were given a mission modifier, which, unlike the USAF system, came after the type code: 'C' for transports, 'O' for observation and reconnaissance aircraft, 'U' for utility types, and 'Z' for experimental aircraft. Aircraft types designated in this system were numbered sequentially.^[7]

Airplane, Cargo, 1956-1962

AC-1 Caribou - de Havilland Canada (redesignated as CV-2 in 1962, then C-7 in 1967)
AC-2 Buffalo - de Havilland Canada (redesignated as CV-7 in 1962, then C-8 in 1967)

Airplane, Observation, 1956-1962

AO-1 Mohawk - Grumman (redesignated as OV-1 in 1962)
AO-2 Inflatoplane - Goodyear
AO-3 Inflatoplane - Goodyear

Airplane, Research, 1956-1962

Sequence	Name	Manufacturer	Image	First flight	Notes/Notable Variants
AZ-1	Marvelette	Mississippi State University		16 November 1962

Flying Platform, 1955-1956

HO-1 Pawnee - Hiller (redesignated as VZ-1 in 1956)
HO-2 - de Lackner Helicopters (redesignated as HZ-1 in 1956)

Helicopter, Cargo, 1956-1962

HC-1A Sea Knight (redesignated as CH-46C in 1962)
HC-1B Chinook (redesignated as CH-47A in 1962)

Helicopter, Observation, 1956-1962

HO-1 - Sud-Ouest
HO-2 - Hughes
HO-3 - Brantly
HO-4 - Bell (redesignated as OH-4A in 1962)
HO-5 - Fairchild Hiller (redesignated as OH-5A in 1962)
HO-6 - Hughes (redesignated as OH-6A in 1962)

Helicopter, Utility, 1956-1962

HU-1 Iroquois - Bell (redesignated as UH-1 in 1962)

Helicopter, Experimental, 1956-1962

HZ-1 Aerocycle - de Lackner Helicopters

Vertical Takeoff and Landing Research, 1956-1962

VZ-9 Avrocar

VZ-1 Pawnee - Hiller
VZ-2 - Vertol
VZ-3 Vertiplane - Ryan
VZ-4 Convertiplane - Doak
VZ-5 Fledgling - Fairchild
VZ-6 - Chrysler
VZ-7-Curtiss-Wright
VZ-8 Airgeep - Piasecki
VZ-9 Avrocar - Avro Canada
VZ-10 Hummingbird - Lockheed (redesignated as XV-4 in 1962)
VZ-11 Vertifan - Ryan (redesignated as XV-5 in 1962)
VZ-12 Kestrel - Hawker Siddeley (redesignated as XV-6 in 1962)

Unified System, 1962-present

Airborne Laser

Sequence	Name	Manufacturer	Image	Notes/Notable Variants
AL-1		Boeing		^[8] Airborne Laser Testbed

Airship

Sequence	Name	Manufacturer	Notes/Notable Variants
Z-1		Goodyear	^[8]
Z-2	Sentinel	Westinghouse Airships
Z-3		American Blimp	^[2]

Anti-Submarine Warfare

Sequence	Name	Manufacturer	Notes/Notable Variants
S-1			Skipped
S-2	Tracker	Grumman Aircraft	Formerly S2F
S-3	Viking Shadow	Lockheed Corporation

Attack

Sequence	Name	Manufacturer	Notes/Notable Variants
A-1	Skyraider	Douglas	(formerly designated AD)
A-2	Savage	North American	(formerly designated AJ)
A-3	Skywarrior	Douglas	(formerly designated A3D)
A-4	Skyhawk	Douglas	(formerly designated A4D)
A-5	Vigilante	North American	(formerly designated A3J)
A-6	Intruder	Grumman	(formerly designated A2F)
A-7	Corsair II	LTV
A-9		Northrop	Losing contender for the AX competition
A-10	Thunderbolt II	Fairchild Republic	Winning contender for the AX competition
A-12	Avenger II	McDonnell Douglas / General Dynamics	cancelled
F/A-18C/D	Hornet	McDonnell Douglas	^[9]
F/A-18E/F	Super Hornet	Boeing	^[9]
A-26	Invader	Douglas	(redesignated from B-26 in 1966)
A-29	Super Tucano	Embraer
A-37	Dragonfly	Cessna	(originally designated AT-37)