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).
With a sketch describing the thermostat arrangement and operation on a Packard car.
| Identifier | ExFiles\Box 78\1\ scan0163 | |
| Date | 2nd June 1919 | |
| To R.{Sir Henry Royce} from EH. c. to CJ. c. to BN.{W.O. Bentley / Mr Barrington} c. to E c. to DA.{Bernard Day - Chassis Design} X.436 X.3565 X.1364. X 3652 EH2/LG2.6.19. RE THERMOSTAT ARRANGEMENT ON "PACKARD" CAR Attached herewith is a sketch which shews the thermostat arrangement on the Packard Car. The butterfly valves are arranged in this thermostat so that the circulation through the radiator is entirely stopped until the thermostat warms up and opens the valves. The thermostat operates as follows:- Up to 55°C - movement nil. " " 58°C - " .125" " " 61°C - " .250" " " 65°C - " .650" Particulars of the tube are as follows:- [Sketch of a corrugated tube section with dimensions 2.450" by 2.000" and text '14 Sections'] R.R. 235A (500 T) (S.D. 408. 26-4-17) Din. 8/150/13. | ||