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 report detailing before and after measurements for connecting rod bearings and crankpin dimensions.
| Identifier | ExFiles\Box 124\1\ scan0020 | |
| Date | 23th February 1939 | |
| UNIT Nọ BEN. 80 No.1 PASSED TO TEST :- 9-12-38 COMPLETED TEST :- 23-2-39 CONN: ROD BEARINGS & CRANKPIN DIMENSIONS CONN: ROD BEARINGS :- EW. 1749 MATL :- AC.9. CRANKSHAFT :- EB. 4104 (EX. 31604) MATL :- 4461-1 C.A.B. TEST PIECE Nọ :- RUNNING TIME :- 68 HRS. (18 HRS 50 MINS. F.T.) MILEAGE :- TABLE DATA: | Nọ | POSITION | BEARINGS (BEFORE, AFTER, WEAR) | CRANKPIN (BEFORE, AFTER, WEAR) | CLEARANCE (BEFORE, AFTER, DIFF.) | |----|----------|--------------------------------|--------------------------------|------------------------------------| | 1 | A-A | 2.00125, 2.0015, .00025 | 1.9990, 1.9980, .0010 | .00225, .0035, .00125 | | | B-B | ", 2.0015, .00025 | ", 1.9980, .0010 | ", .0035, .00125 | | | OVALITY | NIL., NIL. | NIL., NIL. | | | 2 | A-A | 2.00125, 2.0015, .00025 | 1.9990, 1.9980, .0010 | .00225, .0035, .00125 | | | B-B | ", 2.0015, .00025 | ", 1.9980, .0010 | ", .0035, .00125 | | | OVALITY | NIL., NIL. | NIL., NIL. | | | 3 | A-A | 2.00125, 2.0020, .00075 | 1.9990, 1.9980, .0010 | .00225, .0040, .00125 | | | B-B | ", 2.0015, .00025 | ", 1.9980, .0010 | ", .0035, .00125 | | | OVALITY | NIL., .0005 | NIL., NIL. | | | 4 | A-A | 2.00125, 2.0015, .00025 | 1.9990, 1.9980, .0010 | .00225, .0035, .00125 | | | B-B | ", 2.0015, .00025 | ", 1.9980, .0010 | ", .0035, .00125 | | | OVALITY | NIL., NIL. | NIL., NIL. | | | 5 | A-A | 2.00125, 2.0015, .00025 | 1.9990, 1.9985, .0005 | .00225, .0030, .00075 | | | B-B | ", 2.0015, .00025 | ", 1.9985, .0005 | ", .0030, .00075 | | | OVALITY | NIL., NIL. | NIL., NIL. | | | 6 | A-A | 2.00125, 2.0015, .00025 | 1.9990, 1.9985, .0005 | .00225, .0030, .00075 | | | B B | ", 2.0010, .00025 | ", 1.9985, .0005 | ", .0025, .00025 | | | OVALITY | NIL., .0005 | NIL., NIL. | | GAUGE SIZE :- | ||