The Hall-Scott A-7 was an early liquid-cooled aircraft engine manufactured by the Hall-Scott company of Berkeley, California. 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 (A-7a) * Aeromarine M-1 (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-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. * 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. * A Hall-Scott A-7a is on public display at the Hiller Aviation Museum.

Specifications (A-7a)

References

* Gunston, Bill. (1986). ''World Encyclopaedia of Aero Engines''. Patrick Stephens: Wellingborough. p. 73

External links