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).
Dimensions and wear of B.3 Unit big end bearings and crank pins after a 16,900-mile test in France.
| Identifier | ExFiles\Box 82\5\ scan0187 | |
| Date | 17th June 1937 | |
| B.3. UNIT BIG END BEARING DIMENSIONS AFTER 16,900 MILES IN FRANCE. CRANKSHAFT EB2687 V.G.M. 5674 W.736 (2 HOLES IN CRANKPINS) BIG END BEARINGS IN AC.7. MATERIAL WITH RR.56 LINERS. TABLE DATA: BEARINGS No | DIA. BEFORE | DIA. AFTER AA{D. Abbot-Anderson} | DIA. AFTER BB | OVALITY | MAX WEAR 1 | 2.0014 | 2.0002 | 1.9978 | .0004 | -.0012 2 | " | 2.0016 | 1.9981 | .0035 | .0002 3 | " | 2.001 | 1.9973 | .0037 | -.0004 4 | " | CAP HALF OF BEARING BROKEN. 5 | " | 2.0019 | 1.9976 | .0043 | .0005 6 | " | 2.003 | 1.9981 | .0049 | .0016 CRANK PINS No | DIA. BEFORE | DIA. AFTER 'A' | DIA. AFTER 'B' | OVALITY | MAX WEAR 1 | 1.9994 | 1.9991 | 1.9991 | NIL | .0003 2 | " | 1.9991 | 1.9991 | NIL | .0003 3 | " | 1.9991 | 1.9991 | NIL | .0003 4 | 5 | 1.9994 | 1.9991 | 1.9991 | NIL | .0003 6 | " | 1.9991 | 1.9991 | NIL | .0003 MAXIMUM CLEARANCES No | BEFORE | AFTER 1 | .002 | .0011 2 | " | .0025 3 | " | .0019 4 | 5 | " | .0028 6 | " | .0039 ALL BEARINGS IN GOOD CONDITION. N_o 4 CAP-HALF, WHICH WAS SLIGHTLY CRACKED, WAS BROKEN AFTER DISMANTLING. ROLLS-ROYCE, LTD. PRINT ROOM 17 JUN 1937 DERBY. | ||