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).
Thermostatic water temperature control for cars with dummy shutters.
| Identifier | ExFiles\Box 156\1\ scan0144 | |
| Date | 20th December 1935 | |
| To E. {Mr Elliott - Chief Engineer} X1328 Hs {Lord Ernest Hives - Chair} /Std.25/KW.20.12.35. Thermostatic Control of Water Temperature for Cars with Dummy Shutters. We understand that there is a possibility of dummy shutters (as per Packard) being used on either the Bentley or the new 20/25 HP. cars. This will of course necessitate thermostatic valve control of the water temperature. We should like to point out that neither the existing designs of thermostatic valve arrangement - Bentley and Ph.III - are satisfactory from a production point of view; i.e., the British Thermostat people tell us that it is not a practicable production proposition to make bellows of the size we specify to give the accuracy of control we think desirable. Our suggestions (based on our discussion with the British Thermostat Co.) are that the diameter of the valve and bellows should be as large as possible, and that the bellows should be as long as possible, and that the pressure areas of the bellows and valve should be accurately balanced. We attach herewith some scheme used by other firms. We should like you to return them after inspection. Hs {Lord Ernest Hives - Chair} /Std. | ||