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).
Positions, numbers, and performance of 'Rapson' tyres on chassis 98 M.
| Identifier | ExFiles\Box 39\1\ Scan121 | |
| Date | 21th June 1924 | |
| POSITIONS & NUMBERS OF "RAPSON" TYRES ON CHASSIS 98 M.{Mr Moon / Mr Moore} R.R. N°. MAKER'S COVER N°. MAKER'S TUBE N°. WHERE FITTED. REMARKS. 1. XO.82424. 68521. N.S.F. 2nd tread commenced to shew after 1779 miles. Worn right down to canvas after 4114 miles. Tyre removed. Total loss of air pressure 3 lbs. 2. XO.82414. 68497. O.S.F. 2nd tread commenced to shew after 1779 miles. Worn right down to canvas after 4114 miles. Tyre taken off. Total loss of air pressure 6 lbs. 3. XO.82327. 68502. N.S.R. Tyre worn right down to canvas after 1583 miles. Tyre removed. Total loss of air pressure 8 lbs. 4. XO.82437. 68520. O.S.R. 2nd tread beginning to shew after 1021 miles. Tyre burst after 2025 miles. Worn right down to canvas. Total loss of air pressure 3 lbs. 5. XO.82301. 68139. N.S.R. 2nd tread shewing completely after 1467 miles. Punctured by half horseshoe after 2480 miles. Tyre was worn right down to canvas. Tyre removed. Loss of air pressure 2 1/2 lbs. 6. XO.82336. 68190. N.S.R. 2nd tread shewing completely after 887 miles. Mileage to date 1001. Still running. 7. XO.82321. 68244. O.S.R. 2nd tread shewing completely after 1467 miles. Worn right down to canvas after 2793 miles. Tyre removed. Loss of air pressure 5 lbs. 8. XO.82308. 68305. O.S.F. mileage to date 917. Still running. Approx. average speed during tests 38 m.p.h. | ||