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 K.L.G. Sparking Plugs about specially made plugs with copper inserts for the Schneider Cup engine.
| Identifier | ExFiles\Box 58\3\ Scan116 | |
| Date | 30th August 1929 | |
| X1918.b. TELEPHONE: PUTNEY 2132 & 2133 TELEGRAMS: KAELGEE-PHONE-LONDON CONTRACTORS TO THE ADMIRALTY - WAR OFFICE - AIR MINISTRY & FOREIGN GOVERNMENTS CODES USED { A.B.C. 5TH EDITION, WESTERN UNION K.L.G. Sparking Plugs Limited THE MOTOR TRADE ASSOCIATION LOGO MAKERS OF JIGS AND PRECISION TOOLS SOLE MANUFACTURERS OF K.L.G. SPARKING PLUGS THE SOCIETY OF BRITISH AIRCRAFT CONSTRUCTORS SBAC LOGO ROBINHOOD ENGINEERING WORKS PUTNEY VALE LONDON S.W.15 IN YOUR REPLY PLEASE REFER TO DEPT AND QUOTE REFERENCE KLG/MEN. 30th August, 1929. W.F. Hives, Esq., Messrs. Rolls-Royce Limited, Nightingale Road, Derby. Dear Hives, With reference to my telephone conversation with Mr. Rowbotham, we are sending you per parcel post thirty "K.L.G." plugs type 618 which have been specially made for test in your Schneider Cup engine. These plugs are so very much superior in heat resistance (without affecting oil resistance) to any which we have previously supplied to you that I really feel I am justified in asking you to test them with a view to their possible use during the race itself. The only material difference in these plugs is the fitting of a copper insert to the electrode with the object of getting the heat away from the actual electrode head, which was undoubtedly getting very hot in the plugs previously sent you. This copper insert is by a special method very strongly expanded throughout its length when in the electrode, with the object of insuring perfect thermal contact throughout its length. The results obtained in fitting a copper insert in this way are really remarkable and have the advantage of not affecting the arrangement of the mica insulation in any way from the plugs which have been so well tried as far as this most vital part is concerned. | ||