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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 non ...
, twin updraft carburettor engine.
It had an aluminium sump, block and cylinder head
In an internal combustion engine, the cylinder head (often abbreviated to simply "head") sits above the cylinders and forms the roof of the combustion chamber.
In sidevalve engines, the head is a simple sheet of metal; whereas in more modern ov ...
, and is an overhead camshaft
An overhead camshaft (OHC) engine is a piston engine where 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 combustion c ...
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, usually near the front of an aircraft or spacecraft, from which a Pilot in command, pilot controls the aircraft.
The cockpit of an aircraft contains flight instruments on an instrument panel, and the ...
. The diesel-powered Sunbeam Pathan
The Sunbeam Pathan, also known as the Sunbeam P.1, was a 1920s British diesel aero engine.
Design and development
Louis Coatalen, Sunbeam engine designer, started work on a diesel powered aero-engine, that would be suitable for use in airships ...
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 Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ...
(an Avro 504K
The Avro 504 was a First World War biplane aircraft made by the Avro aircraft company and under licence by others. Production during the war totalled 8,970 and continued for almost 20 years, making it the most-produced aircraft of any kind tha ...
) 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 Austr ...
Co. Ltd. in Mascot, New South Wales
Mascot is a suburb in the Inner-South 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 pa ...
.
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