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).
Comparative water temperature tests between two Wraith cars, one fitted with a cast iron engine.
| Identifier | ExFiles\Box 124\1\ scan0098 | |
| Date | 3rd May 1939 | |
| 10HH o 600C. +b00. To By.{R.W. Bailey - Chief Engineer} c. to Hs.{Lord Ernest Hives - Chair} c. to Ds. c. to Da{Bernard Day - Chassis Design}/JNR.{Charles L. Jenner} Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager}9/JH.3.5.39. Wraith car 29.G.VI. Cast Iron Engine Unit B.60 No.2. We have just run comparative water temperature tests on Six Hills with 28.G.VI. and 29.G.VI. cars. The thermostats were removed from both cars, and the radiator shutters were held fully open. Air temperature 10°C. Both cars were run at high speed until the oil temperatures rose to 110°C. and the highest water temperatures reached in the top water pipes were, 29.G.VI. 80°C. and 28.G.VI 81°C. Normal running water temperatures on both cars were 46° - 48°C. Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} | ||