| |
| | Rolls Royce Merlin 61 |
 | | Hawker Hurricane, Supermarine Spitfire, Boulton Paul Defiant, Curtiss P-40F/L Kittyhawk*, North American P-51B/D Mustang, Fairey Fulmar, De Havilland Mosquito, Bristol Beaufighter*, Westland Welkin, Fairey Battle, Fairey Barracuda, Hawker Henley, Armstrong-Whitworth Whitley, Vickers Wellington*, Avro Lancaster, Handley-Page Halifax*, Avro York. |
 | | Prototype development work on the Merlin B through to F led to a number of modifications, including changes to the cylinder head and cylinder block casting, as well as the cooling system. |
 | | Both the Hawker Horsley and Fairey Battle were also used as flight test aircraft during the course of development. |
| www.spitfireart.com /merlin_engines.html (1812 words) |
|