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).
Letter stating that the requested water temperature alteration requires the development of a new type of Calorstat.
| Identifier | ExFiles\Box 89\3\ scan0064 | |
| Date | 22th November 1935 | |
| -2- Hs{Lord Ernest Hives - Chair}/Std.17/KW.22.11.35. If these instructions are carried out, the water temperature will run at its correct average figure of 78°C. This cannot be altered to the 85 - 90°C. which you request, without the development of a new type of Calorstat. Yours faithfully, FOR ROLLS-ROYCE LIMITED. | ||