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).
Table of wear measurements for connecting rod small end bushes after 30,000 miles of use.
| Identifier | ExFiles\Box 101\2\ scan0253 | |
| Date | 4th March 1937 | |
| C.17 UNIT CONN. ROD - SMALL END BUSHES E 51375 - BZ/PC DIMENSIONS TAKEN AFTER 30,000 MILES Nº. | DIAM. 'AA{D. Abbot-Anderson}' | DIAM. 'BB' | OVALITY 1. | .7512 | .7508 | .0004 2. | .7508 | .7505 | .0003 3. | .7512 | .7507 | .0005 4. | .7510 | .7508 | .0002 5. | .7513 | .7508 | .0005 6. | .7512 | .7508 | .0004 NOTE! BUSHES ARE BELL-MOUTHED. - MAX. ON DIA. - + .0002 X | ||