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).
Request to Dunlop Ltd. for deflection rating curves for specific tyre sizes.
| Identifier | ExFiles\Box 157\1\ scan0138 | |
| Date | 27th October 1934 | |
| 4050 Exptl. Dept. Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}9/KW. 27th October, 1934. Messrs. Dunlop Ltd., Fort Dunlop, Erdington, Birmingham. For the attention of Mr. Healey. Dear Sirs, Can you send us deflection rating curves for your 17 x 7 and 15 x 7.50 tyres at various tyre pressures up to a load of 2000 lbs ? We find the most accurate way to measure spring rating is to measure the deflection of the complete car for various loads and then allow for the rate of the tyre. If you could send us these particulars we should be very grateful. Yours faithfully, FOR ROLLS-ROYCE LIMITED. | ||