The Standard H-2 was an early American

Army An army (from Old French ''armee'', itself derived from the Latin verb ''armāre'', meaning "to arm", and related to the Latin noun ''arma'', meaning "arms" or "weapons"), ground force or land force is a fighting force that fights primarily on ...

reconnaissance aircraft, ordered in

1916 Events Below, the events of the First World War have the "WWI" prefix. January * January 1 – The British Royal Army Medical Corps carries out the first successful blood transfusion, using blood that had been stored and cooled. * ...

. The H-2 was built by the

Standard Aircraft Corporation The Standard Aircraft Corporation was an American aircraft manufacturer, founded in Plainfield, New Jersey, in 1916 Standard Aircraft anticipated American entry into World War I, despite an expressed policy of isolationism. The same year it was f ...

, and previously known as the Sloane H-2. It was an open-cockpit three-place

tractor A tractor is an engineering vehicle specifically designed to deliver a high tractive effort (or torque) at slow speeds, for the purposes of hauling a trailer or machinery such as that used in agriculture, mining or construction. Most comm ...

biplane A biplane is a fixed-wing aircraft with two main wings stacked one above the other. The first powered, controlled aeroplane to fly, the Wright Flyer, used a biplane wing arrangement, as did many aircraft in the early years of aviation. While ...

, powered by a 125 hp (90 kW)

Hall-Scott Hall-Scott Motor Car Company was an American manufacturing company based in Berkeley, California. It was among the most significant builders of water-cooled aircraft engines before World War I. History 1910–21 The company was founded in 191 ...

A-5 engine. Only three were built. An improved version, the H-3, with the same engine, earned an order for nine aircraft, while the

Navy A navy, naval force, or maritime force is the branch of a nation's armed forces principally designated for naval and amphibious warfare; namely, lake-borne, riverine, littoral, or ocean-borne combat operations and related functions. It include ...

ordered three with

float Float may refer to: Arts and entertainment Music Albums * ''Float'' (Aesop Rock album), 2000 * ''Float'' (Flogging Molly album), 2008 * ''Float'' (Styles P album), 2013 Songs * "Float" (Tim and the Glory Boys song), 2022 * "Float", by Bush ...

s as the H-4H. Two Standard H-3s were sold by the US Army to Japan, where a further three were built by the Provisional Military Balloon Research Association (PMBRA) in 1917, powered by

Hall-Scott L-4 Hall-Scott Motor Car Company was an American manufacturing company based in Berkeley, California. It was among the most significant builders of water-cooled aircraft engines before World War I. History 1910–21 The company was founded in 1910 ...

engines. They were used as trainers between May 1917 and March 1918, although they were considered dangerous.Mikesh and Abe 1990, p. 55.

Operators

; *

Imperial Japanese Navy Air Service The was the air arm of the Imperial Japanese Navy (IJN). The organization was responsible for the operation of naval aircraft and the conduct of aerial warfare in the Pacific War. The Japanese military acquired their first aircraft in 1910 ...

; *

United States Army The United States Army (USA) is the land warfare, land military branch, service branch of the United States Armed Forces. It is one of the eight Uniformed services of the United States, U.S. uniformed services, and is designated as the Army o ...

United States Navy The United States Navy (USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the largest and most powerful navy in the world, with the estimated tonnage ...

Specifications (H-3)

References

;Notes ;Bibliography * Klemin, Alexander and T. H. Huff
"Course in Aerodynamics and Airplane Design: Part II–Section 1"
''

Aviation Aviation includes the activities surrounding mechanical flight and the aircraft industry. ''Aircraft'' includes fixed-wing and rotary-wing types, morphable wings, wing-less lifting bodies, as well as lighter-than-air craft such as hot ...

'', Volume II, No. 2, 15 February 1917, pp. 91–92. (Registration required). * Donald, David, ed. ''Encyclopedia of World Aircraft'', p. 854, "Standard aircraft". Etobicoke, Ontario: Prospero Books, 1997. * Mikesh, Robert C. and Shorzoe Abe. ''Japanese Aircraft, 1910-1941''. London: Putnam, 1990. . {{Standard Aircraft Corporation Biplanes 1910s United States military reconnaissance aircraft Standard Aircraft Corporation aircraft Single-engined tractor aircraft Aircraft first flown in 1917