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 the deflection versus load for a Smith Calorstat sylphon during direct loading and unloading.
| Identifier | ExFiles\Box 39\4\ Scan103 | |
| Date | 9th March 1930 | |
| Copy for files SMITH CALORSTAT TEST 4. DIRECT LOADING. SYLPHON PIERCED TO ALLOW AIR TO ESCAPE. LIFTING FROM MEAN POSITION. UNLOADING LOADING DEFLECTION - INS. SYLPHON LOAD - LB. PUSHING DOWN FROM MEAN POSITION 9-3-30 | ||