From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Letter to the Champion Sparking Plug Co. Ltd. requesting sample plugs for testing on Phantom III and 25/30 chassis.
| Identifier | ExFiles\Box 162\3\ img006 | |
| Date | 3rd August 1936 | |
| Y6000. Hs{Lord Ernest Hives - Chair}/Wst.7/MA. 3rd August, 1936. Messrs. The Champion Sparking Plug Co.Ltd., 83, Pall Mall, London, S.W.1. Dear Sirs, We would like to try out Experimentally Champion Sparking plugs in our cars. Will you please submit for test a set of 14 mm plugs suitable for the Phantom III chassis and a set of 14 mm plugs suitable for the 25/30 chassis. In the case of the former the overall reach should be about 17 mm and the length of barrel including the hexagon 15 mm approximately. The 25/30 plug will require 13 mm reach and 23 mm length of barrel. The gaps should be capable of being opened out to .050". Awaiting your reply, Yours faithfully, FOR ROLLS-ROYCE LIMITED. | ||