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Sunbeam Dyak
British carburettor engine From Wikipedia, the free encyclopedia
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The Sunbeam Dyak was a British inline six-cylinder, water-cooled, twin updraft carburettor engine.
It had an aluminium sump, block and cylinder head, and is an overhead camshaft design with two valves per cylinder. The output was approximately 106 horsepower (79 kW). The engine was started by turning a geared crank handle in the cockpit. The diesel-powered Sunbeam Pathan was developed from this engine.
The first Queensland and Northern Territory Aerial Services (QANTAS) aircraft in Australia (an Avro 504K) was fitted with a Sunbeam Dyak engine by the Australian Aircraft & Engineering Co. Ltd. in Mascot, New South Wales.[1]
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Specifications (Dyak)
Data from Lumsden[2]
General characteristics
- Type: 6-cylinder, upright, inline engine
- Bore: 4.72 in (120 mm)
- Stroke: 5.12 in (130 mm)
- Displacement: 538.26 cu in (8.8 L)
- Dry weight: 399 lb
Components
- Valvetrain: Overhead camshaft, two valves per cylinder
- Cooling system: Liquid-cooled
- Reduction gear: Direct drive, left-hand tractor
Performance
- Power output: 100 hp at 1,200 rpm (takeoff power)
- Compression ratio: 5:1
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See also
Comparable engines
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External links
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