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).
Test report logging mileage and performance of Dunlop straight-sided tyres with the latest type arrow tread.
| Identifier | ExFiles\Box 45\1\ Scan171 | |
| Date | 14th January 1921 | |
| 14.1.21. TESTS ON DUNLOP STRAIGHT-SIDED TYRES (latest type arrow tread) Tyre pressures - Rear 75 lbs. Front 60 lbs. | Date. | Tyres fitted. | Position on Car. | Total mileage. F.{Mr Friese} R.{Sir Henry Royce} | Daily miles. | Route taken. | Remarks. | |---|---|---|---|---|---|---| | 10.12.20 | FD.{Frank Dodd - Bodies}D.5442 FD.{Frank Dodd - Bodies}D.5412 FD.{Frank Dodd - Bodies}D.5206 FD.{Frank Dodd - Bodies}D.5234 | N.front O.front N.rear O.rear | 35 35 35 35 | | Birmingham to Derby. | See report Hs{Lord Ernest Hives - Chair}/THW1/LG 7.12.20 | | 11.12.20 12.12.20 | FD.{Frank Dodd - Bodies}D.5442 FD.{Frank Dodd - Bodies}D.5412 FD.{Frank Dodd - Bodies}D.5206 FD.{Frank Dodd - Bodies}D.5234 | N.front O.front N.rear O.rear | 90 90 90 90 | 55 | Derbyshire | | | 13.12.20 | FD.{Frank Dodd - Bodies}D.5442 FD.{Frank Dodd - Bodies}D.5412 FD.{Frank Dodd - Bodies}D.5206 FD.{Frank Dodd - Bodies}D.5234 | N.front O.front N.rear O.rear | 93 93 93 93 | 3 | Local | | | 14.12.20 | FD.{Frank Dodd - Bodies}D.5442 FD.{Frank Dodd - Bodies}D.5412 FD.{Frank Dodd - Bodies}D.5206 FD.{Frank Dodd - Bodies}D.5234 | N.front O.front N.rear O.rear | 100 100 100 100 | 7 | Local | | | 16.12.20 | FD.{Frank Dodd - Bodies}D.5442 FD.{Frank Dodd - Bodies}D.5412 FD.{Frank Dodd - Bodies}D.5206 FD.{Frank Dodd - Bodies}D.5234 | N.front O.front N.rear O.rear | 136 136 136 136 | 36 | Derbyshire. | | | 18.12.20 19.12.20 | FD.{Frank Dodd - Bodies}D.5442 FD.{Frank Dodd - Bodies}D.5412 FD.{Frank Dodd - Bodies}D.5206 FD.{Frank Dodd - Bodies}D.5234 | N.front O.front N.rear O.rear | 340 340 340 340 | 204 | Derbyshire. | | Contd. | ||