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).
Development of an improved and cheaper thermostat system for the B.III model.
| Identifier | ExFiles\Box 156\1\ scan0280 | |
| Date | 9th October 1937 | |
| To: By/NS.{Norman Scott} from Rm{William Robotham - Chief Engineer}/Std. c.c. Ds. c.c. By.{R.W. Bailey - Chief Engineer} 2oob 1328. B.III THERMOSTAT SYSTEM. As the result of tests carried out now that the weather is colder, and with the aid of the cold chamber, we have established that the thermostat system, which we are standardising on the last B.II chassis (Rm.{William Robotham - Chief Engineer}415 scheme) gives only a little quicker warming up than the standard Bentley car and creates excessive water pressures in the cylinder block. It does, however, give very good temperature control. For B.III, therefore, we wish to improve on this system and yet retain its cheapness as far as possible. To do this we must use a large byepass and consequently must arrange to cut this off when the water temperature is high. We have found a thermostat unit of the "drop in" type, made by Messrs. S.Smith & Sons Ltd. We attach herewith a drawing and sample of same ( X.30065 ). Will you please scheme and detail a water outlet to accomodate this unit with a ¾" byepass pipe, the connections for the latter being made by means of hose and clips. If successful, we may be able to bring this onto the last B.II chassis, in any case a similar scheme can probably be used for B.III. Rm{William Robotham - Chief Engineer}/Std. | ||