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).
Graphical chart detailing Smith's Calorstat tests, plotting load versus temperature for radiator shutter operation.
| Identifier | WestWitteringFiles\U\August1930-November1930\ Scan061 | |
| Date | 9th September 1930 | |
| 9.9.30 SMITH'S CALORSTAT TESTS LOADS REQ'D TO JUST RAISE SYLPHON FROM BOTTOM OF CASING, & ALSO TO HOLD BELLOWS AGAINST STOP. NO GUIDE BUSH. WITH RETURN SPRING JUST OPENING. WITH RETURN SPRING FULL OPEN. RETURN SPRING. 19 LBS INITIAL. 22 LBS FINAL. WITHOUT RETURN SPRING JUST OPENING. WITHOUT RETURN SPRING FULL OPEN. ROAD TESTS WITH RETURN SPRING. SHUTTERS FULL OPEN 72 1/2 °C 65-63. SHUTTERS FULL CLOSED 62 1/2 °C. 45-50. AXIS LABELS: PULL LB. PUSH LB. TEMP. °C LOAD TO CLOSE SHUTTERS. 5 LBS. LOAD TO OPEN SHUTTERS. 10 LBS. | ||