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).
Fortnightly report on the performance test of Dunlop straight-sided tyres.
| Identifier | ExFiles\Box 45\1\ Scan191 | |
| Date | 9th April 1921 | |
| TEST ON DUNLOP STRAIGHT SIDED TYRES. FORTNIGHT ENDING 9TH APRIL. Date. | Tyres fitted. | Position on car. | Total mileage. F.{Mr Friese} R.{Sir Henry Royce} | Daily Miles. | Route taken. | Remarks. 22.3.21 WGD.4261 O front 814 WGD.4088 N front 814 WGD.4257 O rear 814 WGD.4998 N rear 814 Daily Miles: 44 Route taken: Local. 23.3.21 WGD.4261 O front 827 WGD.4088 N front 827 WGD.4257 O rear 827 WGD.4998 N rear 827 Daily Miles: 13 Route taken: Local 29.3.21 WGD.4261 O front 997 WGD.4088 N front 997 WGD.4257 O rear 997 WGD.4998 N rear 997 Daily Miles: 170 Route taken: Derbyshire. Remarks: Average speed 20 MPH. roads fairly good - noise from tyres more noticeable between 20 & 40 M.P.H. 1.4.21 WGD.4261 O front 1131 WGD.4088 N front 1131 WGD.4257 O rear 1131 WGD.4998 N rear 1131 Daily Miles: 134 Route taken: Derbyshire. Remarks: Average M.P.H. 25. Roads fairly good. 2.4.21. 3.4.21 WGD.4261 O front 1219 WGD.4088 N front 1219 WGD.4257 O rear 1219 WGD.4998 N rear 1219 Daily Miles: 88 Route taken: Local test runs. Remarks: Speeds varying from 10 to 60 MPH. 4.4.21 WGD.4261 O front 1299 WGD.4088 N front 1299 WGD.4257 O rear 1299 WGD.4998 N rear 1299 Daily Miles: 80 Route taken: " " " 5.4.21 WGD.4261 O front 1373 WGD.4088 N front 1373 WGD.4257 O rear 1373 WGD.4998 N rear 1373 Daily Miles: 74 Route taken: " " " Contd. (Vertically on right side) R.R. 29A (50) TIS H 386 1M-2-21: G 2038 | ||