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).
Bentley thermostats, their specifications, and anticipated performance compared to radiator shutters.
| Identifier | ExFiles\Box 156\1\ scan0042 | |
| Date | 12th July 1934 | |
| 4508 To E.{Mr Elliott - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}3/KW.12.7.34. Bentley Thermostats. Attached is a note from Hs{Lord Ernest Hives - Chair}/FD.{Frank Dodd - Bodies} on the Bentley cooling system when controlled by a thermostat as opposed to thermostatically controlled radiator shutters. All the thermostats supplied for this scheme were made by the Packless Gland Co. and open at 82 to 83° instead of 75° as specified on the drawing. This accounts for the high top water temperature encountered on the road. With an air intake temperature of 25° the carburetter intake is 43° with this scheme. This might be expected in hot weather when water is going through the matrix. In very cold weather, however, we anticipate the carburetter intake temperature will be much colder than with the thermostatically operated shutters. We shall take the first opportunity of proving this. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||