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 connecting rod bearing and crankpin dimensions before and after running.
| Identifier | ExFiles\Box 123\5\ scan0337 | |
| Date | 15th February 1939 | |
| UNIT Nº B.60. No.1 PASSED TO TEST :- 17-9-38 COMPLETED TEST :- 15-2-39 CONN: ROD BEARINGS & CRANKPIN DIMENSIONS CONN: ROD BEARINGS :- Ex. 31502 MATL :- AC.9 CRANKSHAFT :- EB. 3867 MATL :- V.C.M. TEST PIECE Nº :- XV. 7402-B.105. RUNNING TIME :- 197HRS 20MINS (92HRS. 45MINS. F.T.) MILEAGE :- — TABLE: Nº | POSITION | BEARINGS (BEFORE | AFTER | WEAR) | CRANKPIN (BEFORE | AFTER | WEAR) | CLEARANCE (BEFORE | AFTER | DIFF.) 1 | A-A | 2.00125 | 2.0020 | .00075 | 1.9990 | 1.9985 | .0005 | .00225 | .0035 | .00125 | B-B | " | 2.0015 | .00025 | " | 1.9990 | NIL. | " | .0025 | .00025 | OVALITY | NIL. | .0005 | | NIL. | .0005 | | | | 2 | A-A | 2.00125 | 2.00125 | NIL. | 1.9990 | 1.9985 | .0005 | .00225 | .00275 | .0005 | B-B | " | 2.0010 | -.00025 | " | 1.9985 | .0005 | " | .0025 | .00025 | OVALITY | NIL. | .00025 | | NIL. | NIL. | | | | 3 | A-A | 2.00125 | 2.00225 | .0010 | 1.9990 | 1.9980 | .0010 | .00225 | .00425 | .0020 | B-B | " | 2.00125 | NIL. | " | 1.9985 | .0005 | " | .00275 | .0005 | OVALITY | NIL. | .0010 | | NIL. | .0005 | | | | 4 | A-A | 2.00125 | 2.0022 | .00095 | 1.9990 | 1.9980 | .0010 | .00225 | .0042 | .00205 | B-B | " | 2.0010 | -.00025 | " | 1.9985 | .0005 | " | .0025 | .00025 | OVALITY | NIL. | .0012 | | NIL. | .0005 | | | | 5 | A-A | 2.00125 | 2.0010 | -.00025 | 1.9990 | 1.9985 | .0005 | .00225 | .0025 | .00025 | B-B | " | 2.0010 | -.00025 | " | 1.9985 | .0005 | " | .0025 | .00025 | OVALITY | NIL. | NIL. | | NIL. | NIL. | | | | 6 | A-A | 2.00125 | 2.0013 | .00005 | 1.9990 | 1.9985 | .0005 | .00225 | .0028 | .00055 | B B | " | 2.0013 | .00005 | " | 1.9990 | NIL. | " | .0023 | .00055 | OVALITY | NIL. | NIL. | | NIL. | .0005 | | | | MAX. & MIN. CLEARANCES GIVEN. GAUGE SIZE :- | ||