The Standard H-2 was an early American

Army An army, ground force or land force is an armed force that fights primarily on land. In the broadest sense, it is the land-based military branch, service branch or armed service of a nation or country. It may also include aviation assets by ...

reconnaissance aircraft, ordered in 1916. The H-2 was built by the Standard Aircraft Corporation, 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 (vehicle), trailer or machinery such as that used in agriculture, mining or constructio ...

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 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, military maritime fleet, war navy, or maritime force is the military branch, branch of a nation's armed forces principally designated for naval warfare, naval and amphibious warfare; namely, lake-borne, riverine, littoral z ...

ordered three with floats 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 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 ; *

United States Army The United States Army (USA) is the primary Land warfare, land service branch of the United States Department of Defense. It is designated as the Army of the United States in the United States Constitution.Article II, section 2, clause 1 of th ...

United States Navy The United States Navy (USN) is the naval warfare, maritime military branch, service branch of the United States Department of Defense. It is the world's most powerful navy with the largest Displacement (ship), displacement, at 4.5 millio ...

Specifications (H-3)

References

;Notes ;Bibliography * Klemin, Alexander and T. H. Huff
"Course in Aerodynamics and Airplane Design: Part II–Section 1"
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Aviation Aviation includes the activities surrounding mechanical flight and the aircraft industry. ''Aircraft'' include fixed-wing and rotary-wing types, morphable wings, wing-less lifting bodies, as well as lighter-than-air aircraft such as h ...

'', 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