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 detailing the material analysis and hardness of hardened Piston Rings.
| Identifier | ExFiles\Box 148\3\ scan0112 | |
| Date | 27th November 1935 | |
| X1256 ? R W RUDGE-WHITWORTH LTD TELEPHONE 4001 TELEGRAMS RUDGE COVENTRY RUDGE WORKS COVENTRY GLH/MH.{M. Huckerby} Your ref: Hs{Lord Ernest Hives - Chair}/Std/9,KW. Messrs. Rolls-Royce Ltd., DERBY. 27th. November, 1935. Dear Sirs, Reverting to your enquiry of the 16th. instant, regarding hardened Piston Rings. These are purchased from The British Piston Ring Company, of Coventry, in the hardened condition; the hardness being between the limits of C.35 - C.45 Rockwell. The analysis of material is said by the Makers to be as follows :- Total Carbon 3.5% max. Combined " .45 to .8%. Silicon. 1.8 to 2.3% max. Sulphur. .12% max. Phosphorus. .8% max. Manganese. .6 to 1.2%. Nickel. .5% to .8%. Chrome. .5% to .8%. Cont'd....... [Handwritten note in right margin] in file X/360 - letter chiefly relates to Tappets [Footer] MAKERS OF RUDGE-WHITWORTH BICYCLES AND RUDGE MOTOR CYCLES EDWARD DE STEIN, CHAIRMAN. MAJOR GERALD R.{Sir Henry Royce} ASHTON. THE HON. J.{Mr Johnson W.M.} MULHOLLAND. ALFRED J.{Mr Johnson W.M.} DENNISS. FRANK G.{Mr Griffiths - Chief Accountant / Mr Gnapp} WOOLLARD, MANAGING DIRECTOR. | ||