Tyre performance and durability for chassis 9-G-111.
| Identifier | ExFiles\Box 4\9\ 09-page112 | |
| Date | 26th August 1925 | |
| S.R. 497a (20m) (S.R. 173 25-9-24) J.B.D. EXPERIMENTAL REPORT Expl. No. COPY. REF: Chateauroux(French test region). 26.8.25. TYRES RECEIVED FOR CHASSIS 9-G-111. Fitted to chassis in Derby . . . . . . . . . . . . 6 Received from Paris 13.6.25 . . . . . . . . . . . 8 " " " 17.6.25 . . . . . . . . . . . 6 " " " 25.6.25 . . . . . . . . . . . 6 " " " 1.7.25 . . . . . . . . . . . . 6 " " " 14.8.25 . . . . . . . . . . . 6 Tyres discarded during first 10,000 miles test. No.1 after 3,840 miles - worn to canvas. No.2 " 2,580 " - " " " No.3 " 2,373 " - " " " No.4 " 3,840 " - " " " No.5 " 1,687 " - " " " No.6 " 2,020 " - " " " No.7 " 2,770 " - " " " No.8 " 3,947 " - Burst - unfit for further use. No.9 " 609 " - Burst - unfit for further use. No.10 " 1,819 " - Worn to canvas. No.12 " 1,165 " - Walls badly damaged. No.13 " 1,105 " - Worn to canvas. No.14 " 1,663 " - " " " No.15 " 3,840 " - " " " No.16 " 4,330 " - Burst - unfit for further use. No.18 " 1,550 " - " " " No.27 " 430 " - Cut through by horse-shoe. Tyres still in running condition at end of first 10,000 miles test. No.19 after 1,070 miles. No.20 " 1,000 miles. No.28 " 1,700 miles. Tyres discarded during second 10,000 miles test. - starting on 6.8.25. No.19 after 2,388 miles - worn to canvas. No.20 " 2,623 " - " " " No.23 " 877 " - Burst - useless. No.24 " 1,558 " - Worn to canvas. No.28 " 474 " - Burst & useless. contd:- | ||
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).