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 detailing mileage and performance of a set of Dunlop experimental tyres.
| Identifier | ExFiles\Box 45\1\ Scan184 | |
| Date | 21th February 1921 | |
| TYRE MILEAGE OF LATEST SET OF DUNLOP EXPERIMENTAL TYRES Table Columns: Tyres Date, Tyres fitted, Position on car, Total miles F.{Mr Friese}, Total miles R.{Sir Henry Royce}, Daily miles, Route taken, Remarks. Row 1: Tyres Date: 5.2.21, 6.2.21 Tyres fitted: WGD.4088, WGD.4261, WGD.4998, WGD.427 Position on car: N front, O front, N rear, O rear Total miles F: 139, 139 Total miles R: 139, 139 Daily miles: 139 Route taken: Ashbourne Buxton & Manchester. Remarks: Tyres fitted 3221 Average speed 30 M.P.H. Give and take roads. Row 2: Tyres Date: 7.2.21 Tyres fitted: WGD.4088, WGD.4261, WGD.4998, WGD.4257 Position on car: N front, O front, N rear, O rear Total miles F: 150, 150 Total miles R: 150, 150 Daily miles: 11 Route taken: Local Remarks: Row 3: Tyres Date: 8.2.21 Tyres fitted: WGD.4088, WGD.4261, WGD.4998, WGD.4257 Position on car: N front, O front, N rear, O rear Total miles F: 198, 198 Total miles R: 198, 198 Daily miles: 48 Route taken: Local Remarks: Average speed 20 M.P.H. Tyres feel too hard. Row 4: Tyres Date: 9.2.21 Tyres fitted: WGD.4088, WGD.4261, WGD.4998, WGD.4257 Position on car: N front, O front, N rear, O rear Total miles F: 216, 216 Total miles R: 216, 216 Daily miles: 18 Route taken: Local Remarks: Average speed 30 M.P.H. Good roads. Row 5: Tyres Date: 10.2.21 Tyres fitted: WGD.4088, WGD.4261, WGD.4998, WGD.4257 Position on car: N front, O front, N rear, O rear Total miles F: 288, 288 Total miles R: 288, 288 Daily miles: 72 Route taken: Derbyshire. Remarks: Average speed 30 M.P.H. Good roads. Row 6: Tyres Date: 12.2.21, 13.2.21 Tyres fitted: WGD.4088, WGD.4261, WGD.4998, WGD.4257 Position on car: N front, O front, N rear, O rear Total miles F: 360, 360 Total miles R: 360, 360 Daily miles: 72 Route taken: Derbyshire. Remarks: Average speed 20 M.P.H. tyres still O.K. slow speeds. | ||