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 relative to speed, under specific load and inflation conditions.
| Identifier | ExFiles\Box 45\1\ Scan340 | |
| Date | 1st June 1925 | |
| INCREASE IN EFFECTIVE RADIUS OF 33x5 TYRE INFLATED TO 70lbs/sq.in. and CARRYING 1320lbs. load Y-axis: Increase in radius - millimetres. X-axis: SPEED Miles per hour Bottom right: R.D. June 1925 Paper watermark: KINWEST Paper manufacturer: A.G. THORNTON LTD MANCHESTER | ||