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).
Vehicle performance during a test run, including temperatures, engine operation, and clutch and brake efficiency.
| Identifier | ExFiles\Box 82\1\ scan0007 | |
| Date | 17th February 1933 guessed | |
| [Left Column] as much as you like. We held 92 for a few miles (c.o. open) little wind road level 4250 R.P.M. Air temp 9.5°C. Oil temp max 84°C. Water max shutters jammed open } 58°C. If the thermometer is right, therefore, the cooling is more than adequate with the small low speed fan we have fitted + the wide Marston matrix. It would obviously be an advantage to fit a Viscon type of oil cooler. We checked the tappet clearance at the beginning of [Right Column] the days run, no valves had taken up excessively (Running at c.o. close) The engine continues to run perfectly and at top speeds is as smooth as could be desired. No signs of plugs pre igniting or sooting up at low speeds Oil consumption about 1000 M.P.G. No shock damper has lost a measurable quantity of oil The brakes have maintained their excellent efficiency The clutch pedal pressure is rather heavy in traffic but the clutch has shewn no signs of slipping. One minor criticism is that on some of the bad Italian roads | ||