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 AC-Sphinx Sparking Plug Co. Ltd. sending sample plugs with sinterkorund insulators for testing.
| Identifier | ExFiles\Box 163\5\ img015 | |
| Date | 9th April 1936 | |
| TELEGRAMS: SPHINX, DUNSTABLE TELEPHONE: DUNSTABLE 360 PRIVATE BRANCH EXCHANGE. THE AC-SPHINX SPARKING PLUG Co. LTD. DIRECTORS: N. F.{Mr Friese} STOCKBRIDGE, W. O.{Mr Oldham} KENNINGTON, C. J.{Mr Johnson W.M.} BARTLETT DUNSTABLE BEDFORDSHIRE THE SOCIETY OF MOTOR MANUFACTURERS & TRADERS LTD OUR REF. NFS/GEB. YOUR REF. 9th April, 1936. Messrs. Rolls-Royce Limited, Derby. For the Attention of Mr. H.E. West. Dear Mr. West, I am now sending to you under separate cover today by registered post some sample plugs with sinterkorund insulators as follows: I. Two 14 mm. detachable type plugs marked S404 (heat characteristics Code No.4). II. Two 14 mm. detachable type plugs marked S403 (heat characteristics Code No.3). Now, I don't want to presume to suggest to you the tests to which you should put these plugs, but I do want you to realise that they are virtually "a shot in the dark". From our knowledge of the heat characteristics of sinterkorund, I shall expect all of them to stand a considerable amount of heat. I take it that you will proceed fairly quickly to test these plugs on your single cylinder units, and if you can keep an accurate record of their performance, I am sure that the test report will be an extremely useful guide in our arriving at a satisfactory plug design for the various jobs. When you have the tests fairly well under way, with several hours performance on each of the plug types, I think it would be useful if I ran up to Derby to go over the job with you in detail. If you will give me some idea when this will be, I shall be grateful. MAKERS OF AC SPARKING PLUGS - AC AIR CLEANERS - AC PETROL PUMPS - AC PETROL GAUGES - AC OIL FILTERS - AC OIL GAUGES | ||