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).
Graph plotting temperature against pull and push forces for Smith's Calorstat tests on a large type model.
| Identifier | ExFiles\Box 39\4\ Scan176 | |
| Date | 2nd October 1930 | |
| 2.10.30, SMITH'S CALORSTAT TESTS, LARGE TYPE, SYLPHON IN NORMAL POSITION, SHUTTERS CLOSED, SYLPHON ON STOP, SHUTTERS OPEN, TEMP °C, PULL - LB., PUSH - LB., 100, 80, 60, 40, 20 | ||