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 load in LBS against the relative movement of two ball ends for different tube settings.
| Identifier | ExFiles\Box 17\3\ Scan408 | |
| Date | 13th August 1929 guessed | |
| LOAD LBS 500 400 300 200 100 0 -100 -200 -300 OPTINON TESTED 21 E.X. AS SENT OUT. MEAN OF BOTH ENDS. MODIFIED SETTING OF S.S. TUBE TO N. SCH. 2301 RELATIVE MOVEMENT OF TWO BALL ENDS. | ||