Letter from The Lodge Sparking Plug Company regarding testing special C9 plugs with projecting Mica sleeves and an experimental air-cooled plug.
| Identifier | ExFiles\Box 79\1\ scan0220 | |
| Date | 27th January 1920 | |
| LODGE PLUGS LIMITED. FORMERLY The Lodge Sparking Plug Company Limited. Rugby. Telegrams: 'Lodge Rugby' Telephone: Rugby 235. UNDER GOVERNMENT CONTROL. Messrs. Rolls-Royce Ltd., Nightingale Road, D E R B Y. YOUR REF Hs {Lord Ernest Hives - Chair} 1/LG22120. OUR REF BH/EW. Date 27th January 1920. For the attention of Mr. Hives. Dear Sirs, We thank you for your letter of the 22nd inst. The 4 special C9. Plugs with projecting Mica sleeve have come to hand. We have examined these and they seem to us to be in perfect condition. We are therefore returning them to you herewith as you will no doubt like to continue your test on them. This type of plug will undoubtedly withstand sooting better than the Standard C9. The only question is whether the extended Mica sleeve will withstand the heat. This is a matter which you will no doubt be able to determine. We note that you consider that a further number of these plugs should be made up for test, and we should be very pleased to supply you with any further quantity you may require, and on this point we await your instructions. With regard to the experimental air cooled plug, this was submitted more for Aero work or special racing engines, where slow running is not important. We do not P.T.O. | ||
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).