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 Avon India Rubber Co. Ltd. requesting the effective rolling radius of a tyre for speedometer purposes.
| Identifier | ExFiles\Box 156\3\ scan0104 | |
| Date | 6th April 1939 | |
| 138/ Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls}3/MH.{M. Huckerby} 6th. April, 1939. The Avon India Rubber Co. Ltd., Melksham, WILTS. For the attention of Dr. Mackay. Dear Sirs, We should be glad if you could let us know the effective rolling radius of the 6 1/2 x 16 tyre both at low speeds and at 100 miles an hour. If you cannot measure the latter figure, perhaps you can estimate it with sufficient accuracy for speedometer purposes. Yours faithfully, for ROLLS-ROYCE LTD. | ||