The Sunbeam Dyak was a British inline six-cylinder, water-cooled, twin updraft carburettor engine.

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] Data from Lumsden[2] Comparable engines Related lists