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).
Report showing diagrams and measurements of main bearing wear after road tests in France.
| Identifier | ExFiles\Box 101\2\ scan0264 | |
| Date | 8th March 1937 | |
| 22 GV MAIN BEARINGS AFTER TESTS IN 'FRANCE' CRANKCASE HALVES ALL BEARINGS 'PITTED' BEARING-CAP HALVES ALL BEARINGS 'PITTED' Annotations on diagrams: LIGHT GROOVES, METAL BROKEN AWAY, CRACKS, BULGES Diagram labels: No 2, No 3, No 4, No 5, No 6 NOS 1 x 7 IN GOOD CONDITION THOUGH PITTED TABLE DATA: MAIN BEARINGS No | DIA BEFORE | DIA. AFTER AA{D. Abbot-Anderson} | DIA. AFTER BB | OVALITY | MAX. WEAR 1 | 2.2509 | 2.2515 | 2.2495 | .002 | .0006 2 | " | 2.2540 | 2.2515 | .0025 | .0031 3 | " | 2.2532 | 2.2512 | .002 | .0023 4 | " | 2.2530 | 2.2515 | .0015 | .0021 5 | " | 2.2535 | 2.2506 | .0029 | .0026 6 | " | 2.2530 | 2.2507 | .0023 | .0021 7 | " | 2.2516 | 2.2508 | .001 | .0007 CRANK JOURNALS No | DIA BEFORE | DIA AFTER 'A' | DIA AFTER 'B' | OVALITY | MAX. WEAR 1 | 2.2482 | 2.2481 | 2.2472 | .0009 | .001 2 | 2.2486 | 2.2480 | 2.2471 | .0009 | .0015 3 | 2.2487 | 2.2480 | 2.2470 | .001 | .0017 4 | 2.2486 | 2.2480 | 2.2470 | .001 | .0016 5 | 2.2487 | 2.2481 | 2.2471 | .001 | .0016 6 | 2.2486 | 2.2480 | 2.2471 | .0009 | .0015 7 | 2.2484 | 2.2481 | 2.2472 | .0009 | .0012 MAX CLEARCE BETWEEN BRG & JOURNAL No | BEFORE | AFTER 1 | .0027 | .0043 2 | .0023 | .0069 3 | .0022 | .0062 4 | .0023 | .006 5 | .0022 | .0064 6 | .0023 | .0059 7 | .0025 | .0044 STAMP: ROLLS-ROYCE, LTD. TEST ROOM, MAR 8 1937, DERBY. CRANKSHAFT EB 2687 MAIN BEARINGS IN W/M.{Mr Moon / Mr Moore} GROOVED EX 19004/5 HAVE COMPLETED 28,923 MILES IN FRANCE AND 1,175 SINCE RETURN TO ENGLAND J VCM 3938/VILL Ex I. 137 L.A.D 3.3.37 | ||