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 from Champion Sparking Plug Co. Ltd. regarding the supply and specification of spark plugs for specific engines.
| Identifier | ExFiles\Box 162\3\ img009 | |
| Date | 6th August 1936 | |
| TELEPHONE WHITEHALL 4744-5&6. CHAMPION SPARKING PLUG Co.LTD., MEMBERS OF S.M.M.&T. S.M.T.A.LTD. M.T.A. B.C.&M.C.M.&T.U. N.U.M. 83 PALL MALL, LONDON, S.W.1. 6th August 1936 Y6000. TELEGRAMS CHAMPLUG.LONDON. FACTORIES WINDSOR.CANADA. IN REPLY PLEASE REFER TO SECRETARIAL AWH/DF. Messrs. Rolls-Royce Ltd., DERBY Attention: Mr. A.{Mr Adams} H.{Arthur M. Hanbury - Head Complaints} West, Technical Research Dept. Dear Sirs, With further reference to your letter of 3rd August, and the telephone conversation you had with our Technical Representative, Mr. H.W.Irving, we have today forwarded you under separate cover fourteen of our Type NA{Mr Nadin}-10 plugs and eight Type L-10. The NA{Mr Nadin}-10 are the plugs we recommend for the Phantom III engine, while the L-10's are recommended for the 25/30 engine. In regard to the gap setting of .050", this is a new departure in ignition and we have only recently taken the matter up with our factory, who are investigating its possibilities. Immediately we have further information on the subject, we shall be pleased to place it before you. However, the plugs referred to above have been tested satisfactorily with gaps up to .040". We thank you for your interest in our product and are arranging for our Mr. Irving to call upon you within a short time after you have had an opportunity of testing the abovementioned plugs. Yours truly, CHAMPION SPARKING PLUG COMPANY LTD. [Signature] SECRETARY | ||