The Hall-Scott A-7 was an early liquid-cooled aircraft engine manufactured by the
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 1910 ...
company of
Berkeley, California
Berkeley ( ) is a city on the eastern shore of San Francisco Bay in northern Alameda County, California, United States. It is named after the 18th-century Irish bishop and philosopher George Berkeley. It borders the cities of Oakland and Emer ...
. Using a
straight-4
A straight-four engine (also called an inline-four) is a four-cylinder piston engine where cylinders are arranged in a line along a common crankshaft.
The vast majority of automotive four-cylinder engines use a straight-four layout (with the ...
configuration, the engine developed 90 horsepower (67 kW) as the A-7 and 100 horsepower (75 kW) as the A-7a. In service these engines suffered from reliability problems and were prone to catch fire while in operation.
Variants
* A-7: The A-7 used the same cylinders as the earlier Hall-Scott A-5. Bore: , stroke: , displacement: , weight: , power: at 1,400 rpm, weight:
* A-7a: The A-7a used the same cylinders as the earlier Hall-Scott A-5a.
[
]
Applications
* Aeromarine 39
The Aeromarine 39 was an American two-seat training seaplane ordered by the US Navy in 1917 and built by the Aeromarine Plane and Motor Company of Keyport, New Jersey. Of conventional biplane configuration and construction, the aircraft was des ...
(A-7a)
* Aeromarine M-1
The Aeromarine M-1 was a two-seat training biplane ordered by the US Army's Aviation Section, U.S. Signal Corps (USAAS) in 1917 and built by the Aeromarine Plane and Motor Company of Keyport, New Jersey.
Design and development
Originally know ...
(A-7a)
* Dayton-Wright FS
The Dayton-Wright FS was a two-seat trainer that first flew in 1917. This was the first aircraft manufactured by the Dayton-Wright Company. The FS was originally known as the 'first shot' since it was the company's 'first shot' at making an a ...
(A-7a)
* Standard J-1
The Standard J is a two-seat basic trainer two-bay biplane produced in the United States from 1916 to 1918, powered by a four-cylinder inline Hall-Scott A-7a engine. It was constructed from wood with wire bracing and fabric covering. The J-1 ...
In 2017 about seven A-7a engines were still in use in Edwardian racing cars, mostly in the United Kingdom.
Engines on display
* A Hall-Scott A-7a is on public display at the Aerospace Museum of California
The Aerospace Museum of California is a private non-profit aviation museum located in North Highlands, California, outside of Sacramento, California, on the grounds of the former McClellan Air Force Base. The museum has a 4.5-acre outdoor Air Park ...
.
* A Hall-Scott A-7a is in ownership of the National Air and Space Museum
The National Air and Space Museum of the Smithsonian Institution, also called the Air and Space Museum, is a museum in Washington, D.C., in the United States.
Established in 1946 as the National Air Museum, it opened its main building on the Nat ...
.
* A Hall-Scott A-7a is on public display at the Museum of Flight
The Museum of Flight is a private non-profit air and space museum in the Seattle metropolitan area. It is located at the southern end of King County International Airport (Boeing Field) in the city of Tukwila, immediately south of Seattle.< ...
.
* A Hall-Scott A-7a is on public display at the Hiller Aviation Museum.
Specifications (A-7a)
See also
References
* Gunston, Bill. (1986). ''World Encyclopaedia of Aero Engines''. Patrick Stephens: Wellingborough. p. 73
External links
Photo of an A-7 at passion-aviation.qc.ca
{{Aeroengine-specs
1910s aircraft piston engines