The Hercules Mk. 264 was an air-cooled, sleeve-valve, two-row 14-cylinder radial engine displacing 2,360 cubic inches. It had a compression ratio of 7.0:1, a propeller reduction gear ratio of 0.444 to 1, and supercharger gear ratios of 6.64:1 (low) and 8.30:1 (high).

The Mk. 264 was a development of previous Hercules types, employing a two-speed turbine-entry supercharger, Hobson injection carburettor with oil heated throttles, a constant-level oil sump, and copper-based cylinder heads.

The Hercules Mk. 264 was used in the Vickers Varsity.

Bristol Hercules Mk. 264
General and Technical Information

Note: You must have Adobe® Acrobat® Reader® 5.0 or later installed on your computer to view this CD-ROM.
Acrobat® Reader® is a free download from www.adobe.com.