Hall-Scott A-7
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| A-7 | |
|---|---|
 | |
| Hall-Scott A-7a at the National Air and Space Museum | |
| Type | Piston aero engine |
| National origin | United States of America |
| Manufacturer | Hall-Scott Motor Car Company |
| First run | 1910s |
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 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
[edit]- A-7: The A-7 used the same cylinders as the earlier Hall-Scott A-5. Bore: 5 in (127.00 mm), stroke: 7 in (177.80 mm), displacement: 549.78 cu in (9.01 L), weight: 410 lb (190 kg), power: 90 hp (67 kW) at 1,400 rpm, weight: 410 lb (190 kg)[1]
- A-7a: The A-7a used the same cylinders as the earlier Hall-Scott A-5a. 100 hp (75 kW) 5.25 in × 7 in (133 mm × 178 mm)[1]
Applications
[edit]- Aeromarine 39 (A-7a)
- Aeromarine M-1 (A-7a)
- Dayton-Wright FS (A-7a)
- Standard 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
[edit]- 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.
- 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)
[edit]
Data from Airplane Engine Encyclopedia [1]
General characteristics
- Type: Four-cylinder inline piston engine
- Bore: 5.25 in (133.35 mm)
- Stroke: 7 in (177.80 mm)
- Displacement: 606.14 cu in (9.93 L)
- Dry weight: 420 lb (190 kg)
Components
- Valvetrain: 1 intake and 1 exhaust valve per cylinder, SOHC
- Fuel system: Miller or Zenith carburetors
- Cooling system: Water
Performance
- Power output: 100 hp (75 kW) at 1,400 rpm
See also
[edit]Related lists
References
[edit]- ^ a b c Angle, Glenn D. (1921). Airplane Engine Encyclopedia. Dayton, Ohio: THE OTTERBEIN PRESS. pp. 232-233.
- Gunston, Bill. (1986). World Encyclopaedia of Aero Engines. Patrick Stephens: Wellingborough. p. 73
External links
[edit]
Wikimedia Commons has media related to Hall-Scott A-7.
- Photo of an A-7 at passion-aviation.qc.ca Archived 2011-07-06 at the Wayback Machine
 | This aircraft engine article is missing some (or all) of its specifications. If you have a source, you can help Wikipedia by adding them. |