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).
The insufficient sensitivity of the thermostat controlling the radiator shutters.
| Identifier | ExFiles\Box 82\1\ scan0328 | |
| Date | 13th December 1933 | |
| To Hs.{Lord Ernest Hives - Chair} x41/Bw Hotel de France. Chateauroux. Indre. 13.12.33 I. B. IV. Re Radiator Shutters and Thermostat We find that the load wanted by the thermostat when fully extended is 5 lbs at the end of the lever attached to the radiator shutters, but it requires 85°C in the radiator to fully extend. At 75°C in the radiator it is only half open and is exerting a force of approx 3 lbs. Our trouble therefore is that the thermostat is not sensitive at the temperature we require for normal running. G H Hancock G.W.H. | ||