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 The Light Production Co. Ltd. discussing the tin coating of piston rings and their composition.
| Identifier | ExFiles\Box 148\3\ scan0382 | |
| Date | 25th August 1938 | |
| 1256. C.D.F. Files TELEPHONE: VICTORIA 0671 (5 LINES). CODES: A.{Mr Adams} B. C. 5TH EDITION. ALL COMMUNICATIONS TO BE ADDRESSED TO THE COMPANY. ON ADMIRALTY, WAR OFFICE AND AIR MINISTRY LISTS. THE LIGHT PRODUCTION CO. LTD. PROPRIETORS OF THE LONDON PISTON RING CO. LIMITED. CHAIRMAN & MANAGING DIRECTOR: M.V. ROBERTS. DIRECTORS: E.{Mr Elliott - Chief Engineer} G.{Mr Griffiths - Chief Accountant / Mr Gnapp} DAVIES, WM. THIRTLE. ENGINEERS TELEGRAMS: INLAND, NAPOLEONIC, SOWEST, LONDON. FOREIGN, NAPOLEONIC, LONDON. 60/66, ROCHESTER ROW, WESTMINSTER, S.W.1 WORKS AND GOODS ADDRESS: 61/67, GREENCOAT PLACE, WESTMINSTER, S.W.1. OUR REF. CHB/MB. YOUR REF. Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation}5/JH. 25th August, 1938. Messrs. Rolls Royce Ltd., Experimental Department, Derby. Dear Sirs, In reply to your communication of the 20th inst., we would advise you that the piston rings referred to therein have come to hand safely, and we are proceeding to tin coat these, together with the other rings you mention in your letter, without delay. With regard to your query concerning the rings which we normally supply for your production, complete with pistons, these are, of course, manufactured by ourselves. With regard to cars other than the Bentley, however, we do manufacture rings for you from time to time, but we believe you have other sources of supply which presumably, would include Messrs. Wellworthy. In connection with the cylinder block containing .25% chromium, we see no reason why a material of this composition should not tin coat successfully. We are of the opinion, however, that you will derive very little benefit from such a procedure, although to our knowledge, no actual experiment has been tried. From the ideas we have formed about the influence of tin coating on pistons and rings, it is more than likely that the beneficial result would be retarded rather than assisted by having the bore itself tin | ||