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 Dunlop straight-sided tyres, tracking daily and total mileage.
| Identifier | ExFiles\Box 45\1\ Scan221 | |
| Date | 25th June 1921 | |
| TESTS ON DUNLOP STRAIGHT-SIDED TYRES. 25.6.21. Date. | Tyres fitted. | Position on car. | Total miles. F.{Mr Friese} R.{Sir Henry Royce} | Daily miles. | Route. | Remarks. 2.5.21 £ £ Tyres fitted: WGD.4088, WGD.4261, WGD.4998, WGD.4257 Position on car: O front, N front, O rear, N rear Total miles F: 2729, 2729 Total miles R: 2729, 2729 Daily miles: 32 Route: Test runs Local. 3.5.21 Tyres fitted: WGD.4088, WGD.4261, WGD.4998, WGD.4257 Position on car: O front, N front, O rear, N rear Total miles F: 2752, 2752 Total miles R: 2752, 2752 Daily miles: 23 Route: " " 4.5.21 Tyres fitted: WGD.4088, WGD.4261, WGD.4998, WGD.4257 Position on car: O front, N front, O rear, N rear Total miles F: 2781, 2781 Total miles R: 2781, 2781 Daily miles: 29 Route: " " 5.5.21 Tyres fitted: WGD.4088, WGD.4261, WGD.4998, WGD.4257 Position on car: O front, N front, O rear, N rear Total miles F: 2831, 2831 Total miles R: 2831, 2831 Daily miles: 50 Route: " " 6.5.21 Tyres fitted: WGD.4088, WGD.4261, WGD.4998, WGD.4257 Position on car: O front, N front, O rear, N rear Total miles F: 2895, 2895 Total miles R: 2895, 2895 Daily miles: 64 Route: " " 7.5.21, 8.5.21 Tyres fitted: WGD.4088, WGD.4261, WGD.4998, WGD.4257 Position on car: O front, N front, O rear, N rear Total miles F: 3151, 3151 Total miles R: 3151, 3151 Daily miles: 256 Route: Derby to Blackpool. Remarks: Average speed 25 M.P.H. Give and take roads. 9.5.21 Tyres fitted: WGD.4088, WGD.4261, WGD.4998, WGD.4257 Position on car: O front, N front, O rear, N rear Total miles F: 5183, 5183 Total miles R: 5183, 5183 Daily miles: 32 Route: Local. R.R. 222A 100(T) (S.D. 738. 19-2-21) G 2947 | ||