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 plotting the increase in a Dunlop tyre's effective radius against speed.
| Identifier | ExFiles\Box 53\2\ Scan248 | |
| Date | 22th September 1926 guessed | |
| DUNLOP RUBBER Co. LTD., BIRMINGHAM. SKETCHED BY APPROVED BY MILL DATE DEPARTMENT RECORD NUMBER INCREASE IN RADIUS. - MMS. SPEED. - M.P.H INCREASE IN EFFECTIVE RADIUS OF 33x6.75 DUNLOP CORD BALLOON TYRE LOAD ON TYRE - 1120 lbs. INFLATION PRESSURE - 30 lbs/sq.in. A.{Mr Adams} G.{Mr Griffiths - Chief Accountant / Mr Gnapp} THORNTON LTD. MANCHESTER. | ||