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The Sunbeam Pathan, also known as the Sunbeam P.1, was a 1920s British diesel aero engine.[1][2]

Sunbeam Pathan
Type 6-cyl. In-line, water-cooled, diesel, piston engine.[1]
Manufacturer Sunbeam[1]
Designed by Louis Coatalen[1]
First run 1929[1]
Number built prototypes only[1]
Developed from Sunbeam Dyak[1]

Design and development


Louis Coatalen, Sunbeam engine designer, started work on a diesel powered aero-engine, that would be suitable for use in airships, in 1928.[2] Using his experience with both aero-engines and auto-mobile diesel engines, the result, given the company designation P.1, was based on the Dyak.[2] Given the name Pathan, a prototype engine was displayed at the 1929 Olympia Aero Show, but attracted no orders.[2]

Using the same bore and stroke of the Dyak (120mm x 130mm - 4.72in x 5.12in ), the Pathan was a water-cooled six-cylinder in-line diesel engine with a cubic capacity of 8.8l (537cu in). Rated to give 100 hp (74.6 kW) @ 1,500rpm the engine was fitted with a new type of fuel injection system allowing cold starts without other assistance.[1]

The engine did not enter production as the British Airship Programme was cancelled, and with no need for the engine only prototypes were built.[1][2]

Coatalen continued the development of Diesel engines after he left Sunbeam and returned to France, developing the Coatalen V-12 Diesel engine with limited success, due to the German invasion of 1940 halting further work.[1]


Specifications


Data from [1]

General characteristics

Components

Performance


See also


Related lists


References


  1. Brew, Alec (1998). Sunbeam Aero-engines. Shrewsbury: Airlife Publishing. ISBN 1-84037-023-8.
  2. "Sunbeam Overhead Cam Engines". Archived from the original on 2008. Retrieved 12 December 2009.



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