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).
Tyre performance during high-speed Autobahn tests for the 'Corniche' model.
| Identifier | ExFiles\Box 98\5\ scan0053 | |
| Date | 7th August 1939 | |
| H509 SECRET. W/S. C. from Rm.{William Robotham - Chief Engineer} Rm{William Robotham - Chief Engineer}2/R.7.8.39. 'CORNICHE'. Replying to C3/C4.8.39., in our tests on the Autobahn we used Dunlop Road Racing tyres. Every time we were going to do a long burst of speed, we blew them up to 40 lbs sq.in. We are not suggesting using Avon tyres on the 'Silver Phantom'. Rm.{William Robotham - Chief Engineer} | ||