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 Ltd. regarding spark plug dimensions for Bentley and 25/30 HP engines.
| Identifier | ExFiles\Box 162\4\ img252 | |
| Date | 9th February 1937 | |
| 6001/b (Experimental Dept.) Rm{William Robotham - Chief Engineer}/Wst9/M 9th February, 1937. K.L.G. Sparking Plugs Ltd., Putney Vale, LONDON, S.W.15. Dear Sirs, For the attention of Mr. R.{Sir Henry Royce} Mundy. In reply to your letter of the 8th instant, we wish to inform you that our agreement to using 17 M/M dimension was not intended to be permanent but only to enable you to supply to us quickly, plugs which could be easily modified from your existing stock. For all future plugs for the Bentley and 25/30 H.P. Rolls-Royce Engines we should prefer you to adopt 20 m/m dimension as this does place the high tension terminal a safe distance away from the induction pipe flange. Yours faithfully, For ROLLS-ROYCE LTD. | ||