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. regarding the machining and production of pistons.
| Identifier | ExFiles\Box 148\1\ scan0022 | |
| Date | 6th December 1938 | |
| 1256. TELEPHONE: VICTORIA 0671 (5 LINES). CODES: A.B.C. 5TH EDITION. 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.G. 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/DP YOUR REF. RM{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation}6/JH 6th December, 1938. Messrs. Rolls Royce Ltd., Experimental Dept., DERBY. File Dear Sirs, We duly acknowledge receipt of your communication of the 3rd instant and note your requirements with regard to the 21 Pistons originally intended for the raised portion of the crown to be .300". We note that we are to machine 7 of these to give a raised portion of .330" by machining back the original crown to suit, and although this will make the crown thinner than normal by .030", we do not think the risk is at all considerable. There are several radii blending at this point underneath the crown so that the actual area of reduced thickness would be relatively quite small. Therefore unless your new design of head happens to give a hot spot at this position, we think no disability should arise. We are proceeding with the production of the various Pistons with all speed, and will ensure that the delivery period is reduced to the very lowest minimum. Yours faithfully, FOR THE LIGHT PRODUCTION CO.LTD. R.M. Brooks GENERAL MANAGER. | ||