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 report on Dunlop straight-sided tyres for the week ending 3rd July.
| Identifier | ExFiles\Box 45\1\ Scan057 | |
| Date | 3rd July 1920 | |
| Tests on Dunlop straigh-sided tyres for week-ending 3rd. July. Particulars of car - R-R 40/50 HP. fitted with double limousine body. Wire wheels - Goodyear Rims. Weight - rear 1 ton. 7 cwt. -front 1 " 1 " Tyre pressures 80 lbs. in rear - 65 lbs. in front. Date. Tyres fitted. Position on car. Total miles run. Daily miles. Route taken. Remarks. 28.6.20 FD.{Frank Dodd - Bodies}2012 N rear 1562 136 Lyme Regis to average speed 20 MPH. FD.{Frank Dodd - Bodies}3168 O rear Weston-super-mare. Rear tyres showing FD.{Frank Dodd - Bodies}1908 O front wear. FD.{Frank Dodd - Bodies}1648. N front. 29.6.20 FD.{Frank Dodd - Bodies}2012 N rear 1718 156 Weston-super-mare Average speed 25 MPH. FD.{Frank Dodd - Bodies}3168 O rear to Swansea. bad stretches of FD.{Frank Dodd - Bodies}1908 O front road. FD.{Frank Dodd - Bodies}1648 N front. 30.6.20 FD.{Frank Dodd - Bodies}2012 N rear 1834 116 Swansea to Average speed 25 MPH. FD.{Frank Dodd - Bodies}3168 O rear Gt. Malvern. bad stretches of FD.{Frank Dodd - Bodies}1908 O front road. FD.{Frank Dodd - Bodies}1648 N front. 1.7.20 FD.{Frank Dodd - Bodies}2012 N rear 1936 102 Gt. Malvern Average speed 20 MPH. FD.{Frank Dodd - Bodies}3168 O rear to DERBY. Rear tyres worn very FD.{Frank Dodd - Bodies}1908 O front much. FD.{Frank Dodd - Bodies}2012 down to FD.{Frank Dodd - Bodies}1648 N front. canvas. FD.{Frank Dodd - Bodies}3168 down to canvas in places. Rear tyres taken off for holidays. R.R. 199 (3g01) (SDq6) 19-7-17) MP18/885 | ||