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 horsepower losses in India brand tyres at different speeds and inflation pressures.
| Identifier | ExFiles\Box 158\2\ scan0026 | |
| Date | 2nd May 1933 | |
| 5 INDIA TYRE LOSSES NEW TYRES CURVES AT FULL THROTTLE UNDER LOAD WEIGHT ON 2 TYRES TESTED 1920 LBS APPROX. H.P. LOST IN TYRES M.P.H. 34 LB/IN² FIRST RUN 34 LB/IN² SUBSEQUENT RUNS 46 LB/IN² 22 LB/IN² RM{William Robotham - Chief Engineer}/TAS{T. Allan Swinden}/2-5-33 | ||