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 Lodge Plugs Ltd. regarding performance issues with C.3 and 14mm car plugs.
| Identifier | ExFiles\Box 162\6\ img139 | |
| Date | 22th April 1932 | |
| Y 425- Expl. Dept. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson}5/MA. 22nd, April 1932. Messrs. Lodge Plugs Ltd., RUGBY. For the attention of Mr. Bernard Hopps. Dear Sirs, Car Plugs. We have come up against an undesirable feature of the C.3 plugs which we at present use as standard. They will not slow run on magneto. They are considerably worse than the old C plug in this respect. The old C plug has the defect that it pre-ignites after running five minutes full throttle on the standard low compressions head. It is essential that we should improve the slow running of the C.3 plugs if we are to retain them as standard for the P. 2., and we should like you to investigate the matter. With regard to the 14 mm. plugs. We note your remarks on the A.15. We cannot say anything about the matter of price because we always avoid financial arguments, but we do think it would be worth your while to make an alternative to the A.15 to improve its slow running and submit a set to us for test. This plug has every indication of being a very excellent article, and we believe should not require very much modification to make it suitable for car work. Yours faithfully, FOR ROLLS ROYCE LIMITED. | ||