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 showing results of Smith's Calorstat tests with special fillings, plotting temperature against pull and push forces.
| Identifier | ExFiles\Box 39\4\ Scan189 | |
| Date | 23th October 1930 | |
| SMITH'S CALORSTAT TESTS. Y3499. 23-10-30 CALORSTATS WITH SPECIAL FILLINGS. SPECIAL FILLING "A" SPECIAL FILLING "B" "SHUTTERS CLOSED" POSITION "SHUTTERS OPEN" POSITION TEMP °C PULL. LB. PUSH. LB. 100 80 60 40 20 | ||