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).
Tests on 3RIV for cooling water temperatures with and without calorstat spring fitted.
| Identifier | ExFiles\Box 87\1\ scan0206 | |
| Date | 4th February 1937 guessed | |
| Tests on 3RIV for cooling water temperatures with and without calorstat spring fitted. (1) No spring fitted. (AIR TEMP. 0°C). Top Tank Temp. Minimum running temp. under road condition. 64° C. Maximum running temp. ditto 72° C. Mean " " " 68° C. (2) Calorstat Spring E83210 fitted (AIR TEMP. 11°C). Mean running temp. under road condition. 78.5 C. Shutters reach full open (running light, 1500 rpm). 86 Shutters start to close (running light, 1500 rpm). 74 Shutters fully closed (idling). 67.5° C. | ||