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).
Vehicle mileage and tyre performance log from December 1920 to January 1921.
| Identifier | ExFiles\Box 45\1\ Scan172 | |
| Date | 14th January 1921 guessed | |
| -2- Date. | Tyres fitted. | Position on car. | Total mileage. F.{Mr Friese} R.{Sir Henry Royce} | Daily miles. | Route taken. | Remarks. 20.12.20 | FD.{Frank Dodd - Bodies}D.5256, FD.{Frank Dodd - Bodies}D.5257, FD.{Frank Dodd - Bodies}D.5206, FD.{Frank Dodd - Bodies}D.5234 | N.front, O front, N rear, O rear | 43, 43 / 425 | 85 | Birmingham to Derby. | Front tyres fitted at Birmingham. 24.12.20, 27.12.20 | | | | | | Holidays. 28.12.20 | FD.{Frank Dodd - Bodies}D.5256, FD.{Frank Dodd - Bodies}D.5257, FD.{Frank Dodd - Bodies}D.5206, FD.{Frank Dodd - Bodies}D.5234 | N.front, O front, N rear, O rear | 147, 147 / 529 | 104 | Derbyshire | Average speed 25.M.P.H. Moderate roads. 29.12.20 | FD.{Frank Dodd - Bodies}D.5256, FD.{Frank Dodd - Bodies}D.5257, FD.{Frank Dodd - Bodies}D.5206, FD.{Frank Dodd - Bodies}D.5234 | N front, O front, N rear, O rear | 174, 174 / 556 | 27 | Local | 30.12.20 | FD.{Frank Dodd - Bodies}D.5256, FD.{Frank Dodd - Bodies}D.5257, FD.{Frank Dodd - Bodies}D.5206, FD.{Frank Dodd - Bodies}D.5234 | N front, O front, N rear, O rear | 186, 186 / 568 | 12 | Local | 31.12.20 | FD.{Frank Dodd - Bodies}D.5256, FD.{Frank Dodd - Bodies}D.5257, FD.{Frank Dodd - Bodies}D.5206, FD.{Frank Dodd - Bodies}D.5234 | N front, O front, N rear, O rear | 203, 203 / 585 | 17 | Local | 1.1.21, 2.1.21 | FD.{Frank Dodd - Bodies}D.5256, FD.{Frank Dodd - Bodies}D.5257, FD.{Frank Dodd - Bodies}D.5206, FD.{Frank Dodd - Bodies}D.5234 | N front, O front, N rear, O rear | 282, 282 / 664 | 79 | Derbyshire | Average speed 25 M.P.H. Good roads. Contd. | ||