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 The British Piston Ring Co. Ltd. regarding the materials and casting methods for brake drum liners.
| Identifier | ExFiles\Box 85\1\ scan0212 | |
| Date | 5th October 1936 | |
| L206 Exptl. Dept. Hs{Lord Ernest Hives - Chair}/AFM.{Anthony F. Martindale}22/KW. Your Ref: TRT. 5th October, 1936. The British Piston Ring Co.Ltd., Holbrook Lane, Coventry. Dear Sirs, Brake Drum Liners. In reply to your letter of 16th September, addressed to Mr. Harvey-Bailey. We agree that the centrifugal method of casting these liners is probably most economical. You appear to be under a misapprehension as to the duty the liners do, the stress in them being 12 tons/sq.in. compression. We expect your material could easily stand this load. However, before we embark on experiments with your "Bricromium" we would like to be shown some evidence that it is superior to, or at least by no means inferior to, our present material in its resistance to abrasion, this being the most essential quality of these liners. We are at present using Lake & Eliot's "Milenite", an exceedingly fine iron. If you can produce any such evidence we shall be glad to examine it. Yours faithfully, FOR ROLLS-ROYCE LIMITED. | ||