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 Limited discussing the design and characteristics of sparking plug types 935 and 943.
| Identifier | ExFiles\Box 162\4\ img231 | |
| Date | 4th January 1937 | |
| 6001b K.L.G SPARKING PLUGS LIMITED CONTRACTORS TO THE AIR MINISTRY, ADMIRALTY, WAR OFFICE & FOREIGN GOVERNMENTS. Sole Manufacturers of 'KLG' Sparking Plugs, also Jigs and Precision Tools PUTNEY VALE, LONDON, S.W.15 Telephone Putney 2671 (Four Lines) Telegrams: Kaelgee Phone, London PLEASE REFER TO AVIATION DEPT. AND QUOTE REFERENCE LM/KGB. IN YOUR REPLY Messrs. Rolls-Royce Limited, D E R B Y. Fourth January 1937. Gentlemen, FOR THE ATTENTION OF H.E.WEST ESQ. Replying to the concluding paragraph of your letter of the 30th December - Rm{William Robotham - Chief Engineer}/ Wst.6/JH - both types 935 and 943 are fitted with four platinum earth wires, .020" diameter and the two types vary in the design of the centre electrode. The 935 has a V.14/1 type of centre whilst the 943 has the 868 type of centre. You already know the characteristics of the 868 which is a stage "hotter" than the V.14/1. We shall be very interested indeed to hear the results of your tests with platinum pointed plugs. Yours faithfully, p.p. K.L.G.SPARKING PLUGS LIMITED. Leonard Morgan Assistant Aviation Manager. | ||