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 to Vacuum Oil Co. Ltd. clarifying the material composition of a patented R.R. alloy used for a differential washer.
| Identifier | ExFiles\Box 145\1\ scan0256 | |
| Date | 17th May 1938 | |
| 1229 Experimental Dept. Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls}7/MH.{M. Huckerby} 17th. May 1938. Vacuum Oil Co. Ltd., Caxton House, Westminster, LONDON, S.W.1. For the attention of Mr.O.T.Jones. Dear Sirs, Thank you for your letter of May 16th. The differential washer we handed to Mr.Russell Sharp was forged A.C.1 material, whereas we are actually using in our experimental cars A.C.2. This material is one of the patented R.R. alloys having the following composition :- 2% Tin 1% Manganese 2% Nickel .6% Magnesium .5% Antimony and the remainder aluminium. The washer you have differs from this composition in having only 1% of tin. Yours faithfully, for ROLLS-ROYCE LTD. | ||