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).
Log sheet detailing tests on Dunlop straight-sided tyres, tracking mileage and performance.
| Identifier | ExFiles\Box 45\1\ Scan084 | |
| Date | 4th September 1920 | |
| G.F.C X.4050 File Tests on Dunlop Straight-sided tyres, for week 4th. Sept. Tyre pressures - 70 lbs. 65 lbs. front. Date. | Tyres fitted. | Position on car. | Total miles F.{Mr Friese} | Total miles R.{Sir Henry Royce} | Daily miles. | Route taken. | Remarks. --- | --- | --- | --- | --- | --- | --- | --- 30.8.20 | FD.{Frank Dodd - Bodies}1648, FD.{Frank Dodd - Bodies}1908, FD.{Frank Dodd - Bodies}2460, FD.{Frank Dodd - Bodies}2159 | N.front, O front, N rear, O rear | | | | | Experimenting. 31.8.20 | FD.{Frank Dodd - Bodies}1648, FD.{Frank Dodd - Bodies}1908, FD.{Frank Dodd - Bodies}2460, FD.{Frank Dodd - Bodies}2159 | N front, O front, N rear, O rear | 5063, 5063 | 1270, 1311 | 39 | Derbyshire. | Average speed 20 M.P.H. 1.9.20 | FD.{Frank Dodd - Bodies}1648, FD.{Frank Dodd - Bodies}1908, FD.{Frank Dodd - Bodies}2460, FD.{Frank Dodd - Bodies}2159 | N front, O front, N rear, O rear | 5149, 5149 | 1356, 1397 | 86 | Derbyshire. | Test runs. Average speed 30 M.P.H. Moderate roads. 2.9.20 | FD.{Frank Dodd - Bodies}1648, FD.{Frank Dodd - Bodies}1908, FD.{Frank Dodd - Bodies}2460, FD.{Frank Dodd - Bodies}2159 | N front, O front, N rear, O rear | 5207, 5207 | 1414, 1455 | 58 | Derbyshire. | Average speed 20 M.P.H. Moderate roads. 3.9.20 | FD.{Frank Dodd - Bodies}1648, FD.{Frank Dodd - Bodies}1908, FD.{Frank Dodd - Bodies}2460, FD.{Frank Dodd - Bodies}2159 | N front, O front, N rear, O rear | 5266, 5266 | 1473, 1514 | 59 | Derbyshire. | Average speed 25 M.P.H. Fairly good roads. 4.9.20, 5.9.20 | FD.{Frank Dodd - Bodies}1648, FD.{Frank Dodd - Bodies}1908, FD.{Frank Dodd - Bodies}2460, FD.{Frank Dodd - Bodies}2159 | N front, O front, N rear, O rear | 5639, + 5436 | 1846, 1887 | 373 | Derby to Manchester and back, and Derbyshire. | Average speed 20 MPH. FD.{Frank Dodd - Bodies}1908+ burst after 170 miles at place pointed out in previous report. Roads normal. 5.9.20 | FD.{Frank Dodd - Bodies}1999 | O front | 528 | | 203 | | Fitted. (Side text): R.R.Ltd.(100 T) S. G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 642. 500 G 6.18 | ||