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).
Graph from Dunlop Rubber Co. Ltd. plotting rolling resistance against time as a tyre heats up from a cold start.
| Identifier | ExFiles\Box 45\1\ Scan352 | |
| Date | 19th November 1925 guessed | |
| DUNLOP RUBBER Co. LTD., BIRMINGHAM. SKETCHED BY MILL APPROVED BY DATE DEPARTMENT RECORD NUMBER Rolling Resistance (lbs. wt. per ton) Time - Minutes ROLLING RESISTANCE of 895 x SPEED 50 m 1. Effect of Tyre Temperature. (Tyre Started cold. 80 lb/sq.in) | ||