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 K.L.G. Sparking Plugs regarding misfiring issues with 850 type plugs after use with leaded fuel.
| Identifier | ExFiles\Box 162\4\ img152 | |
| Date | 9th July 1936 | |
| 76001e Hs{Lord Ernest Hives - Chair}/Wst.14/JH. 9th July, 1936. Major C.M. Carington, Messrs. K.L.G. Sparking Plugs, Ltd., Putney Vale, London. S.W.15. K.L.G. 850 sparking plugs. Dear Major Carington, We have had a very elusive failure of 850 type plugs on a customers' car recently. The plugs had been used for a few hundred miles on ordinary petrol and then ran for 400 miles on Leaded fuel, after which they misfired very badly. The car had been used in London during that period mostly "pottering" about. We dismantled the plugs and with the exception of a slight slate grey deposit on the insulator, they were in good condition. Tested electrically they showed no signs of leakage. After cleaning the plugs they were again tried and functioned perfectly. Can you give us any clue to the cause of misifiring as we are much disturbed by the failure on a plug which we had hoped was going to be 100%. Yours sincerely, | ||