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 showing the increase in effective radius of a 33x5 tyre against speed under specific load and pressure conditions.
| Identifier | ExFiles\Box 157\3\ scan0144 | |
| Date | 1st June 1925 | |
| INCREASE IN EFFECTIVE RADIUS OF 33 x 5 TYRE INFLATED TO 70 LBS/SQ" AND CARRYING 1320 LBS LOAD. Y-Axis: INCREASE IN RADIUS - MILLIMETRES X-Axis: SPEED - M.P.H. RD. JUNE 1925. 909 | ||