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 and a diagram for a Sylphon bellows component under direct loading.
| Identifier | ExFiles\Box 39\4\ Scan102 | |
| Date | 9th March 1930 guessed | |
| 9 CORRUGATIONS 1.500 APPROX. FREE LENGTH 1.540" 2.320" TEST 4. SYLPHON PIERCED TO ALLOW AIR TO ESCAPE. DIRECT LOADING. LIFTING FROM MEAN POSITION LOAD LB 0 2 4 6 8 DEFLN INS. LOADING - .094 .169 .229 .259 UNLOADING .049 .114 .179 .234 .259 PUSHING DOWN FROM MEAN POSITION LOAD LB 0 1 2 3 4 5 DEFLN INS. LOADING - .046 .091 .131 .181 .226 UNLOADING 0 .056 .096 .136 .191 .226 | ||