The performance of Rapson S-S Cord Tyres with deflection tubes, tracking mileage and dates.
| Identifier | ExFiles\Box 39\1\ Scan051 | |
| Date | 9th December 1923 | |
| REPORT ON .2 X 4½ RAPSON S-S CORD TYRE. WITH DEFLECTION TUBES. DATE. | TYRE NO'S. | WHERE FITTED. | SPEEDO-METER READING. | DAYS RUN. | TOTAL MILES. | REMARKS. 29.11.23 | YX. 63146, YX. 63253, YX. 63141, YX. 63124 | Off rear, Near rear, Off front, near front. | 1707, 1852 | 145 | 145 | Pressure - Front - 40 lbs. Rear - 45 lbs. 30.11.23 | " | " | 2044 | 192 | 337 | 1.12.23, 2.12.23 | " | " | 2373 | 329 | 666 | 3.12.23 | " | " | 2509 | 136 | 802 | 4.12.23 | " | " | 2706 | 197 | 999 | 5.12.23 | " | " | 2905 | 199 | 1198 | 6.12.23 | " | " | 3105 | 200 | 1398 | 7.12.23 | " | " | 3299 | 194 | 1492 | 8.12.23, 9.12.23 | " / " | " | 3441 | 142 | 1734 | Average speed - 30 M.P.H. | ||
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).