Hall-Scott A-7
The Hall-Scott A-7 was an early aircraft engine manufactured by the Hall-Scott company of Berkeley, California. Of straight-4 configuration, it developed 100 horsepower (75 kW). These engines suffered from reliability problems and were prone to catch fire while in operation.
| A-7 | |
|---|---|
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| Hall-Scott A-7 at the Museum of Flight | |
| Type | Piston aero engine |
| Manufacturer | Hall-Scott |
Variants
- A-7: The A-7 used the same cylinders as the 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 Hall-Scott A-5a. 100 hp (75 kW) 5.25 in × 7 in (133 mm × 178 mm)[1]
Applications
- 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
- A Hall Scott A-7-A is on public display at the Aerospace Museum of California.
Specifications (A-7a)
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
References
- 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
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