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).
Comparing Rapson and Dunlop tyres during tests with 4-wheel brakes in France.
| Identifier | ExFiles\Box 39\1\ Scan160 | |
| Date | 23th September 1924 | |
| To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c.c. to CJ. BJ. c.c. to PN.{Mr Northey} E P. c.c. to BY.{R.W. Bailey - Chief Engineer} Wor.{Arthur Wormald - General Works Manager} X1438 Hs{Lord Ernest Hives - Chair}5/LG23.9.24. RE. TYRES. X1238 X4050 We attach a chart shewing the life of tyres during the tests in connection with 4-wheel brakes in France. The Rapson Tyre Co. loaned to us some tyres for test. It will be seen that the average mileage is approximately the same as the Dunlop. The riding with the Rapson tyres is distinctly more hard than with the Dunlop owing to the fact that the walls of the tyres are thicker. We ran the Rapson tyres with 5 lbs. less pressure than the Dunlops. Steering wobbles were more pronounced with the Rapson tyres fitted. Hs.{Lord Ernest Hives - Chair} | ||