Measurement of lip wear at the top of the bore for Bentley 7 cylinders after 57,000 miles running.
| Identifier | ExFiles\Box 144\3\ scan0042 | |
| Date | 9th February 1938 | |
| BENTLEY 7 CYLINDERS - MEASUREMENT OF LIP AT TOP OF BORE AFTER 57,000 MILES RUNNING CYLINDER - EB.89 - 1/c Diagrams: Top Left Diagram: FORMATION OF LIP AT CROWN Dimensions: .125", .375" Bottom Left Diagram: AA {D. Abbot Anderson} ' - RIGHT ANGLES TO CRANK BB' - PARALLEL Table of Measurements: | BORE | POSITION | XX | YY | EXTENT OF LIP | |------|----------|----------|----------|---------------| | 1 | AA {D. Abbot Anderson} | 3.25075 | 3.25525 | .0045 | | | BB | 3.2505 | 3.25475 | .00425 | | | OVALITY | .00025 | .0005 | | | 2 | AA {D. Abbot Anderson} | 3.2505 | 3.2545 | .004 | | | BB | 3.250 | 3.25475 | .00475 | | | OVALITY | .0005 | NIL- | | | 3 | AA {D. Abbot Anderson} | 3.2505 | 3.255 | .0045 | | | BB | 3.251 | 3.256 | .005 | | | OVALITY | .0005 | .001 | | | 4 | AA {D. Abbot Anderson} | 3.2505 | 3.2535 | .003 | | | BB | 3.25075 | 3.2555 | .00475 | | | OVALITY | .00025 | .002 | | | 5 | AA {D. Abbot Anderson} | 3.25025 | 3.25375 | .0035 | | | BB | 3.2505 | 3.2545 | .004 | | | OVALITY | .00025 | .00075 | | | 6 | AA {D. Abbot Anderson} | 3.2505 | 3.2545 | .004 | | | BB | 3.25075 | 3.25675 | .006 | | | OVALITY | .00025 | .002 | | NOTE! FOR ALL OTHER PARTICULARS REGARDING WEAR OF BORE ETC: SEE OTHER CHART. | ||
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).