List of undesignated military aircraft of the United States

The United States Army, United States Navy, United States Marine Corps, United States Air Force and its predecessors, and United States Coast Guard operated aircraft when specific alphanumerical designation systems were not in use; these aircraft were referred to by their manufacturers' designations. There were also aircraft in service later that did not receive designations for other reasons, such as foreign military aircraft used for testing or special operations, and civil aircraft purchased off-the-shelf or impressed into service.

For aircraft of the Air Force and its preceding Army air services after the introduction of the 1919 United States Army Air Service aircraft designation system, see the list of United States Air Force aircraft designations (1919–1962). For Navy and Marine Corps aircraft that received designations from 1911–1917 and post–1922 United States Navy aircraft designation system, see the list of United States Navy aircraft designations (pre-1962). For the Army designation system used from 1956 to 1962, after the creation of the Air Force, see 1956 United States Army aircraft designation system. For all United States military aircraft after the implementation of the unified 1962 United States Tri-Service aircraft designation system, see list of United States Tri-Service aircraft designations.

Army This list includes aircraft operated by the United States Army, Army Signal Corps, and American Expeditionary Forces. TypeOriginClassRoleIntroducedRetiredNotesAeromarine M-1USPropellerTrainer1917Single-engined piston biplane; evaluated but not acceptedAirco DH.9UKPropellerBomber1917Single-engined piston biplaneAnsaldo SVAItalyPropellerReconnaissance1917Single-engined piston biplaneAvro 504UKPropellerTrainer1913Single-engined piston biplaneBréguet 14FrancePropellerBomber/reconnaissance1918Single-engined piston biplaneBurgess-DunneUSPropellerExperimental1914 or 1915Single-engined tailless piston biplaneBurgess Model FUSPropellerTrainer1911Single-engined piston biplane; license-built Wright Model BBurgess Model HUSPropellerTrainer1912Single-engined piston biplaneBurgess Model IUSPropellerReconnaissance19131915Single-engined piston biplane floatplaneBurgess Model JUSPropellerScout19131914Single-engined piston biplane; license-built Wright Model CBurgess Model UUSPropellerReconnaissance1917Single-engined piston biplane floatplaneCaudron G.3FrancePropellerReconnaissance1917Single-engined piston biplaneCaudron G.4FrancePropellerBomber1917Two-engined piston biplaneCaudron R.11FrancePropellerFighter1918Two-engined piston biplaneCurtiss Model DUSPropellerTrainer19111914Single-engined piston biplaneCurtiss Model EUSPropellerUtility19111914Single-engined piston biplane floatplaneCurtiss Model FUSPropellerUtility1913Single-engined piston biplane flying boatCurtiss Model GUSPropellerScout1913Single-engined piston biplaneCurtiss Model JUSPropellerExperimental1914Single-engined piston biplaneCurtiss Model JNUSPropellerTrainer19151927Single-engined piston biplaneCurtiss Model LUSPropellerTrainer1916Single-engined piston triplaneCurtiss Model NUSPropellerTrainer1915Single-engined piston biplane floatplaneCurtiss Model RUSPropellerUtility1915Single-engined piston biplaneCurtiss Model SUSPropellerFighter1917Single-engined piston triplane; evaluated but not acceptedDorand ARFrancePropellerReconnaissance1917Single-engined piston biplaneFarman F.40FrancePropellerReconnaissance1915Single-engined piston biplaneFarman F.50FrancePropellerBomber1918Two-engined piston biplaneLWF model VUSPropellerTrainer/reconnaissance1916Single-engined piston biplaneMartin RUSPropellerReconnaissance1916Martin SUSPropellerReconnaissance1915Single-engined piston biplane floatplaneMorane-Saulnier AIFrancePropellerTrainer1917Single-engined piston parasol monoplaneMorane-Saulnier PFrancePropellerReconnaissance1914Single-engined piston parasol monoplaneNieuport 10FrancePropellerTrainer1915Single-engined piston biplaneNieuport 11FrancePropellerTrainer1916Single-engined piston biplaneNieuport 12FrancePropellerTrainer1915Single-engined piston biplaneNieuport 17FrancePropellerTrainer1916Single-engined piston biplaneNieuport 21FrancePropellerTrainerSingle-engined piston biplaneNieuport 23FrancePropellerTrainerSingle-engined piston biplaneNieuport 24FrancePropellerTrainerSingle-engined piston biplaneNieuport 27FrancePropellerTrainerSingle-engined piston biplaneNieuport 28FrancePropellerTrainerSingle-engined piston biplaneNieuport 80FrancePropellerTrainerSingle-engined piston biplaneNieuport 81FrancePropellerTrainerSingle-engined piston biplaneNieuport 83FrancePropellerTrainerSingle-engined piston biplaneRoyal Aircraft Factory B.E.2UKPropellerSingle-engined piston biplaneRoyal Aircraft Factory F.E.2UKPropellerSingle-engined piston biplaneRoyal Aircraft Factory S.E.5UKPropellerFighterSingle-engined piston biplaneSalmson 2FrancePropellerTrainer/reconnaissance1918Single-engined piston biplaneSIA 7ItalyPropellerBomber/reconnaissance1917Single-engined piston biplaneSopwith CamelUKPropellerFighterSingle-engined piston biplaneSopwith DolphinUKPropellerFighterSingle-engined piston biplaneSopwith SOP.1FrancePropellerTrainerSingle-engined piston biplane; French license-built Sopwith 1½ StrutterSPAD S.VIIFrancePropellerTrainer1917Single-engined piston biplaneSPAD S.XIFrancePropellerTrainerSingle-engined piston biplaneSPAD S.XIIIFrancePropellerFighter1918Single-engined piston biplaneSPAD S.XVIFrancePropellerTrainerSingle-engined piston biplaneStandard H-2USPropellerTrainer1916Single-engined piston biplaneStandard JUSPropellerTrainer1916Single-engined piston biplaneSturtevant SUSPropellerTrainer/reconnaissance1916Single-engined piston biplaneThomas D-5USPropellerTrainer1915Voisin VIIIFrancePropellerTrainerSingle-engined piston biplaneVoisin XFrancePropellerTrainer1919Single-engined piston biplaneWright Model AUSPropellerTrainer19091911Single-engined piston biplaneWright Model BUSPropellerTrainer/reconnaissance19111914Single-engined piston biplaneWright Model CUSPropellerScout19121914Single-engined piston biplaneWright Model DUSPropellerReconnaissance19121914Single-engined piston biplane

Air Force

This list includes aircraft operated by the United States Air Force and its predecessors: the United States Army Air Service (USAAS), United States Army Air Corps (USAAC), and United States Army Air Forces (USAAF). TypeOriginClassRoleIntroducedRetiredNotesAirspeed OxfordUKPropellerTrainer19421945Two-engined piston monoplane; operated by US units in conjunction with UK Royal Air ForceAlbree Pigeon-FraserUSPropellerFighter1918Single-engined piston monoplaneAntonov An-28UkrainePropellerTransportTwo-engined turboprop monoplaneAvro AnsonUKPropellerTransport19421945Two-engined piston monoplane; operated by US units in conjunction with UK Royal Air Force. Canadian built Ansons operated as AT-20Boeing Model 4USPropellerTrainer1918Single-engined piston biplane with floatsConsolidated LB-30USPropellerBomber1941Four-engined piston monoplane; UK Liberator B Mk II aircraft requisitioned by USAAF and operated under company designation rather than as B-24Curtiss 18USPropellerFighter1918Single-engined piston biplaneC-class blimpUSAirshipPatrol1921Two-engined piston blimp; two aircraft transferred from US NavyCurtiss Model JNUSPropellerTrainer19181927Single-engined piston biplaneCurtiss Model RUSPropellerUtility1918Single-engined piston biplaneD-class blimpUSAirshipPatrol1921Two-engined piston blimp; four aircraft transferred from US NavyDayton-Wright/Fisher DH-4USPropellerBomber19181932Single-engined piston biplane; license-built variant of the Airco DH.4de Havilland DominieUKPropellerTransport19421945Two-engined piston biplane; operated by US units in conjunction with UK Royal Air Forcede Havilland MosquitoUKPropellerBomber19421945Two-engined piston monoplane; operated by US units in conjunction with UK Royal Air Forcede Havilland Tiger MothUKPropellerTrainer19421945Single-engined piston biplane; operated by US units in conjunction with UK Royal Air ForceDouglas BostonUSPropellerBomber19421945Two-engined piston monoplane; UK version of Douglas A-20 operated in conjunction with UK Royal Air ForceEngineering Division USB-1USPropellerFighter1918Single-engined piston biplane; license-built variant of the Bristol F.2Engineering Division USB-2USPropellerFighter1918Single-engined piston biplane; license-built variant of the Bristol F.2Engineering Division USD-9USPropellerBomberSingle-engined piston biplane; license-built variant of the Airco DH.9Engineering Division XB-1USPropellerReconnaissanceSingle-engined piston biplane; license-built variant of the Bristol F.2Fokker D.VIIGermanyPropellerTrainer1918Single-engined piston biplane; obtained as German war reparations, some transferred to US NavyHawker HurricaneUKPropellerFighter19421945Single-engined piston monoplane; operated by US units in conjunction with UK Royal Air ForceHeinkel HD 22GermanyPropellerUtility1930Single-engined piston biplane; one purchased for US Military Attaché in GermanyHeinrich PursuitUSPropellerFighter1918Single-engined piston biplaneLWF model VUSPropellerTrainer/reconnaissance1918Single-engined piston biplaneMartin GMBUSPropellerBomber1918Two-engined piston biplaneMil Mi-171RussiaRotorcraftTransportTwo-engined turboshaft helicopterMiles MasterUKPropellerTrainer/reconnaissance19421945Single-engined piston monoplane; operated by US units in conjunction with UK Royal Air ForceMorane-Saulnier MS-234FrancePropellerUtility19321935Single-engined piston biplane; one purchased for US Military Attaché in ParisOrenco DUSPropellerFighter1919Single-engined piston biplane; also built by CurtissPackard-Le Père LUSAC-11USPropellerFighter1918Single-engined piston biplaneRoyal Aircraft Factory S.E.5UKPropellerFighter1918Single-engined piston biplaneSupermarine SpitfireUKPropellerFighter19421945Single-engined piston monoplane; operated by US units in conjunction with UK Royal Air ForceVerville VCPUSPropellerFighter/racer1920Single-engined piston biplane; later variants designated PW-1 and R-1Vought VE-7USPropellerFighter/trainer1918Single-engined piston biplaneVought VE-8USPropellerFighter/trainer1918Single-engined piston biplaneVought VE-9USPropellerFighter/trainer1927Single-engined piston biplane; improved VE-7

Navy, Marine Corps and Coast Guard

This list includes aircraft operated by the United States Navy, United States Marine Corps and United States Coast Guard.

Aviation in the Marine Corps and Coast Guard has historically been subsidiary to naval aviation, with Marine Corps aircraft being procured by the Navy. Many Coast Guard aircraft have been procured from the Navy or the Air Force and its predecessors, typically carrying designations conforming to equivalent types operated by those services, but the Coast Guard has also independently obtained several aircraft types without a military designation or an equivalent.

The Navy's rigid airships were commissioned as warships and given hull classification symbols, but many of its other lighter-than-air craft never received formal designations. Until the 1940s, Navy blimps were grouped into classes by nominal power and size; within each class, individual aircraft often had significant design variations, and were sometimes sourced from different manufacturers. Spherical crewed free gas balloons used for airship crew training were considered ZF-class aircraft but categorically never received formal designations and were identified only by serial number and volume; similarly, crewed kite balloons and uncrewed barrage balloons were considered ZK-class, but were undesignated.