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 Dunlop about a complaint of skidding with the Silent Tread tyre on bitumen surfaces.
| Identifier | ExFiles\Box 45\2\ Scan209 | |
| Date | 17th January 1930 | |
| X405G. Expl. Dept. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson}2/MJ. Jan 17th.1930. The Dunlop Rubber Co. Ltd., Fort Dunlop, Erdington, BIRMINGHAM. Dear Sirs, For the attention of Mr. Paul. We have just received a complaint from France about the Silent Tread tyre in relation to skidding. The roads over there are largely surfaced with "Bitumen". On this stuff I have frequently been able to spin my rear wheels when accelerating in top gear which must represent a coefficient of friction of not greater than .25. I believe that this is the condition that you should aim at on your test stretch of Tar Macadam. Yours faithfully, For Rolls-Royce Ltd. | ||