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The Sunbeam Dyak was a British inline six-cylinder, 
water-cooled
Cooling tower and water discharge of a nuclear power plant
Water cooling is a method of heat removal from components and industrial equipment. Evaporative cooling using water is often more efficient than air cooling. Water is inexpensive and no ...
, twin updraft carburettor engine.
It had an aluminium sump, block and cylinder head
In a piston engine, the cylinder head sits above the cylinders, forming the roof of the combustion chamber. In sidevalve engines the head is a simple plate of metal containing the spark plugs and possibly heat dissipation fins. In more modern ...
, and is an overhead camshaft
An overhead camshaft (OHC) engine is a piston engine in which the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combustio ...
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
A cockpit or flight deck is the area, on the front part of an aircraft, spacecraft, or submersible, from which a pilot controls the vehicle.
The cockpit of an aircraft contains flight instruments on an instrument panel, and the controls th ...
. The diesel-powered Sunbeam Pathan was developed from this engine.
The first Queensland and Northern Territory Aerial Services (QANTAS) aircraft in Australia
Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...
(an Avro 504K
The Avro 504 is a single-engine biplane bomber made by the Avro aircraft company and under licence by others. Production during World War I totalled 8,970 and continued for almost 20 years, making it the most-produced aircraft of any kind that ...
) was fitted with a Sunbeam Dyak engine by the Australian Aircraft & Engineering
Australian Aircraft & Engineering Co. Ltd. was formed in 1919 by N.B. Love, W.J. Warneford and H.E. Broadsmith. The company was registered in Sydney on 1 October 1919 with capital of £50,000 with the intention of manufacturing aircraft in Austra ...
Co. Ltd. in Mascot, New South Wales
Mascot is an inner south suburb of Sydney, in the state of New South Wales, Australia. Mascot is located 7 kilometres south of the Sydney central business district and is one of the administrative centres of the Bayside Council. A small part of ...
.
Specifications (Dyak)
See also
References
Notes
Bibliography
* Lumsden, Alec. ''British Piston Engines and their Aircraft''. Marlborough, Wiltshire: Airlife Publishing, 2003. .External links
* {{Sunbeam aeroengines Dyak 1910s aircraft piston engines