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 Dunlop Rubber Co. requesting figures for the rolling resistance of balloon and high-pressure tyres.
| Identifier | ExFiles\Box 53\2\ Scan251 | |
| Date | 25th September 1926 | |
| X4565 Expl: Dept: Hs{Lord Ernest Hives - Chair}/Rml/LG. 25th. Sept. 1926 The Dunlop Rubber Co., Fort Dunlop, Erdington, Birmingham. Dear Sirs, For the attention of A.{Mr Adams} Healey. Mr. Paull's Office. A short time ago you were good enough to let us have a curve shewing the increase in rolling resistance of our high pressure tyres with temperature. We wonder whether you could supply us with figures shewing the difference in rolling resistance of the 6.75" balloon tyre at 30 lbs/sq.in., and the 33 x 5" at 45 lbs/sq.in., carried out on the same lines as the previous tests. Yours faithfully, | ||