Sunbeam Dyak
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The Sunbeam Dyak Aircraft Engine is an inline 6 cylinder, water cooled, twin updraught carburettor engine. It has an aluminium sump, block and cylinder head, and is an overhead camshaft design with 2 valves per cylinder. The horsepower is approx 106. One was fitted to the first aircraft QANTAS Airways Ltd owned (An AVRO 504k) and was fitted in Australia by the Australian Aircraft & Engineering Co. Ltd. at Mascot NSW. The engine was started by turning a geared crank handle in the cockpit.