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 discussing material specifications for special poundage piston rings for a 3.5' bore engine.
| Identifier | ExFiles\Box 148\3\ scan0281 | |
| Date | 2nd December 1937 | |
| 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.{Mr Moon / Mr Moore} V.{VIENNA} ROBERTS. DIRECTORS: GEORGE WM. THIRTLE. E.{Mr Elliott - Chief Engineer} G.{Mr Griffiths - Chief Accountant / Mr Gnapp} DAVIES 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/HD.{Mr Hayward/Mr Huddy} YOUR REF. Handwritten: 1206 Handwritten: Re EW1428 2nd December, 1937. Messrs. Rolls Royce Ltd., Experimental Department, DERBY. Dear Sirs, FOR THE ATTENTION OF MR. MATTHEWS. We are in receipt of an enquiry which has been circulated by your Purchase Department for Piston Rings to EW.1536, these being the special poundage rings which were developed at your request for the 3.5" bore engine. The physical characteristics shown on the drawing are correct, but the material called for is cast iron to your specification 212. This material will not give the poundages, etc., called for without modification to the physical dimensions of the ring, and you will remember that in order to get what was wanted, they had to be made in Thermocrom or DTD.233. To avoid confusion in the future, therefore, we would suggest that the drawing be modified in this respect, and no doubt you will use your good offices to have this done. Yours faithfully, FOR THE LIGHT PRODUCTION COMPANY LTD. H.N. Brooks. GENERAL MANAGER. | ||