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).
Test results for six 'Smith Calorstat' units with 'H' filling, measuring pull and push load at various temperatures.
| Identifier | ExFiles\Box 39\4\ Scan222 | |
| Date | 12th January 1931 | |
| "SMITH CALORSTAT" TESTS. "H" FILLING - 6 OFF RECEIVED FROM BY/SS.{S. Smith} TABLE DATA: HEADER: TEMP °C. | LOAD REQ'D TO MAINTAIN SYLPHON IN SHUTTERS CLOSED POSITION-LB- SUB-HEADERS: | N° 1 | N° 2 | N° 3 | N° 4 | N° 5 | N° 6. PULL SECTION: 20°C. | 40.7 LB. | — | 37.6 LB. | — | 39.1 LB. | — 30°C. | 37.6 " | 31.5 LB. | — | 37.6 LB. | — | 36 LB. 40°C. | 34.6 " | 28.5 " | 31.5 " | — | 31.5 " | — 50°C. | 30 " | — | — | 24 " | — | 28.5 " 60°C. | 20.9 " | 16.3 " | 16.3 " | 19.4 " | 17.75 " | — 70°C. | 10.25 " | — | — | — | — | 8.75 " CHANGE TEMP: | 76°C. | 74.5°C. | 75°C. | 75.5°C. | 76°C. | 74.5°C. PUSH SECTION: 80°C. | 10.5 " | 11.5 " | 10.5 " | 12.5 " | 13.5 " | 12.5 " 90°C. | 25.5 " | 25.5 " | 29.5 " | 25.5 " | 26.5 " | 26.5 " 98°C. | 46.5 " | 46.5 " | 52.5 " | 50.5 " | 53.5 " | 55.5 " STAMP: ROLLS-ROYCE, LIMITED [EXPERIM]ENT ROOM, 14 JAN 31 DERBY. | ||