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 data sheet for bellows part number F.85395, showing free, compressed, and return lengths.
| Identifier | ExFiles\Box 151\2\ scan0241 | |
| Date | 5th May 1934 guessed | |
| X 4695 BELLOWS F.85395. FREE LENGTH .742 .765 .750 .762 .760 .750 .770 .760 .770 .780 .765 .765 .725 .757 .765 .760 .775 .768 .760 .725 .772 COMPRESSED LENGTH .580 .600 .580 .570 .550 .585 .600 .600 .580 .590 .600 .600 .565 .585 .600 .610 .603 .570 .570 .540 .600 RETURNS TO .735 .758 .747 .735 .730 .737 .760 .760 .755 .760 .750 .755 .725 .750 .760 .755 .760 .750 .750 .705 .750 | ||