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 India Tyre & Rubber Co. describing the method for checking tyre cover out-of-balance.
| Identifier | ExFiles\Box 29\4\ Scan053 | |
| Date | 14th July 1930 | |
| X4462 Expl. Dept. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}4/MJ. July 14th,1930. The India Tyre & Rubber Co.(Great Britain) Ltd., Inchinnan, SCOTLAND. Dear Sirs, With reference to your letter of the 30th. ult. Our method of checking the cover out-of-balance is to fit the tube to the wheel and carefully balance this assembly independently. The cover is then fitted to this tube and wheel and the total assembly again balanced. The mass added to produce balance multiplied by its distance of inches from the centre of the hub should be less than 37" ozs. Yours faithfully, For Rolls-Royce Ltd. | ||