Hall-Scott A-7-A In-line 4 Engine
date: label: Date
content: 1917
name: label: Manufacturer
content: Hall-Scott Motor Car Company, San Francisco, California
notes: label: Physical Description
content: Type: Reciprocating, In-line, 4 cylinders, water-cooled
label: Physical Description
content: Power rating: 74.6 kW (100 hp) at 1,400 rpm
label: Physical Description
content: Displacement: 9.9 L (606 cu in.)
label: Physical Description
content: Bore and Stroke: 133 mm (5.25 in.) x 178 mm (7 in.)
label: Physical Description
content: Weight: 191 kg (420 lb)
label: Summary
content: The Hall-Scott Motor Car Company, with general offices in San Francisco and factories at Berkeley, California, began specializing in the construction of airplane engines in 1911. The water-cooled 30 kW (40 hp) Type A-1 was the first aircraft engine produced by the company. This was followed the 45 kW (60 hp) Model A-2 and the 60 kW (80 hp) Model A-3, both water-cooled V-8 engines.
label: Summary
content: The Hall-Scott Model A-7-A primarily powered the World War I Standard Aero Corporation Standard J aircraft. The Standard J and its Hall-Scott A-7-A engine along with the Curtiss JN-4D with its OX-5 engine were the two primary trainer aircraft and engines built in the U.S. during World War I. Despite vibration common to four-cylinder engines at the time, the A-7-A was otherwise regarded by experts as a rugged and dependable motor. The A-7-A also powered other Standard, Aero Marine, and Dayton-Wright aircraft.
place: label: Country of Origin
content: United States of America
setName: label: See more items in
content: National Air and Space Museum Collection
creditLine: label: Credit Line
content: Transferred from the U.S. Navy Department, Washington, D.C.
dataSource: label: Data Source
content: National Air and Space Museum
identifier: label: Inventory Number
content: A19270003000
objectType: label: Type
content: PROPULSION-Reciprocating & Rotary
objectRights: label: Restrictions & Rights
content: CC0
physicalDescription: label: Materials
content: Aluminum, Steel, Copper, Textile, Paint, Rubber, Preservative coating, Brass, Phenolic
label: Dimensions
content: Height 111.4 cm (43.88 in.), Width 61 cm (24 in.), Depth 158.8 cm (62.5 in.)