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 log for experimental Dunlop straight-sided tyres, tracking mileage and performance.
| Identifier | ExFiles\Box 45\1\ Scan196 | |
| Date | 18th April 1921 | |
| TESTS ON DUNLOP STRAIGHT-SIDED TYRES (EXPERIMENTAL) | Date. | Tires fitted. | Position on car. | Total miles. F.{Mr Friese} | Total miles. R.{Sir Henry Royce} | Daily miles. | Route taken. | Remarks. | |---|---|---|---|---|---|---|---| | 11.4.21 | WGD.4261 WGD.4088 WGD.4257 WGD.4998 | O front N front O rear N rear | 1733 | 1733 | 68 | Local. | Average speed 20 MPH. Moderate roads - tyres are distinctly noisy. | | 12.4.21 | WGD.4261 WGD.4088 WGD.4257 WGD.4998 | O front N front O rear N rear | 1809 | 1809 | 76 | " | ditto | | 13.4.21 | WGD.4261 WGD.4088 WGD.4257 WGD.4998 | O front N front O rear N rear | 1854 | 1854 | 45 | " | " | | 14.4.21 | WGD.4261 WGD.4088 WGD.4257 WGD.4998 | O front N front O rear N rear | 1930 | 1930 | 76 | " | " | | 15.4.21 | WGD.4261 WGD.4088 WGD.4257 WGD.4998 | O front N front O rear N rear | 2020 | 2020 | 90 | " | " | | 16.4.21 17.4.21 | WGD.4088 WGD.4261 WGD.4998 WGD.4257 | O front N front O rear N rear | 2068 | 2068 | 48 | " | Positions of tyres changed about. Noise from tyres increased. | | 18.4.21 | WGD.4088 WGD.4261 WGD.4998 WGD.4257 | O front N front O rear N rear | 2141 | 2141 | 73 | " | ditto | Contd. (Text printed vertically on the right edge: ...AND PRINTED IN ENGLAND) | ||