Blueprint detailing main bearing and crank journal dimensions for a B3 unit after 16,900 miles of use in France.
| Identifier | ExFiles\Box 82\5\ scan0184 | |
| Date | 17th June 1937 | |
| B3 UNIT. MAIN BEARING DIMENSIONS AFTER 16,900 MILES IN FRANCE. CRANKSHAFT EB 2687 V.G.M 5674 W.736. 2 HOLES IN JOURNALS & PINS. MAIN BEARINGS IN A.C.R. MATERIAL RR.56 LINERS. TABLE DATA: | | BEARINGS | | | | CRANK JOURNALS | | | | | MAXIMUM CLEARANCE | | | | DIA BEFORE | DIA. AFTER | | OVALITY | MAX. WEAR | DIA BEFORE | DIA. AFTER | | OVALITY | MAX. WEAR | BEFORE | AFTER | | | | A | B | | | | "A" | "B" | | | | | |---|---|---|---|---|---|---|---|---|---|---|---|---| | 1 | 2.2513 | 2.2513 | 2.2513 | NIL | NIL | 2.2484 | 2.2483 | 2.2473 | .001 | .0011 | .0029 | .004 | | 2 | " | 2.2523 | 2.2523 | NIL | .001 | 2.2482 | 2.2482 | 2.2470 | .0012 | .0012 | .0031 | .0053 | | 3 | " | 2.2515 | 2.2520 | .0005 | .0007 | 2.2483 | 2.2483 | 2.2470 | .0013 | .0013 | .003 | .005 | | 4 | " | 2.2515 | 2.2525 | .001 | .0012 | 2.2482 | 2.2480 | 2.2479 | .0001 | .0003 | .0031 | .0046 | | 5 | " | 2.2514 | 2.2515 | .0001 | .0002 | 2.2484 | 2.2484 | 2.2475 | .0009 | .0009 | .0029 | .004 | | 6 | " | 2.2519 | 2.2521 | .0002 | .0008 | 2.2484 | 2.2484 | 2.2478 | .0006 | .0006 | .0029 | .0043 | | 7 | " | 2.2514 | 2.2517 | .0003 | .0004 | 2.2484 | 2.2484 | 2.2480 | .0004 | .0004 | .0029 | .0037 | THE ABOVE BEARINGS WERE IN EXCELLENT CONDITION, THOUGH N.4 WAS CRACKED SLIGHTLY IN TWO PLACES. THEY WERE NOT SLACK IN THE BEARING-HOUSINGS. ROLLS-ROYCE, LTD. PRINT ROOM 17 JUN 1937 DERBY. Copied 17/6/37 | ||
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).