Letter to Champion Sparking Plug Co. Ltd. requesting different specification spark plugs for a Phantom III engine.
| Identifier | ExFiles\Box 162\3\ img138 | |
| Date | 24th October 1938 | |
| 6000 EXPERIMENTAL DEPARTMENT. Rm {William Robotham - Chief Engineer} /RC. {R. Childs} 6/JH. 24th. October, 1938. The Champion Sparking Plug Co.Ltd., Feltham, MIDDLESEX. For the attention of H.W. Irving Esq. Dear Sirs, Thank you for the two miniature plugs also for the tickets for Donington, I saw a very good race. We are experimenting with higher compression ratios on the Phantom III engine and are running into preignition troubles. Can you supply us with 2 doz. plugs of the same reach as the NA {Mr Nadin} 8, but cooler running. If possible we should like one dozen a stage cooler, than the other. We will send a covering order as soon as we have the details. Yours faithfully, FOR ROLLS-ROYCE LTD. | ||
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).