Test report detailing the dimensions and wear of connecting rod bearings and crankpins for engine unit C17 after mileage tests.
| Identifier | ExFiles\Box 101\2\ scan0256 | |
| Date | 3rd March 1937 | |
| ENGINE UNIT C17 CHASSIS 22GJ 28,923 MILES IN FRANCE. TEST 1175 MILES IN ENGLAND. DATE - 3-3-37 ROLLS-ROYCE, LTD. PRINT ROOM, 3 MAR 1937 DERBY. CRANKSHAFT EB 2687 MATL. VCM TEST No. CONN. ROD BEARINGS EB 2810 MATL. HALL'S METAL OIL HOLE CONN. ROD BRGS. & CRANKPIN DIMENSIONS CONDITION OF BEARINGS WAS EXCEPTIONALLY GOOD TABLE DATA: CONN. ROD BEARINGS: No. | DIA BEFORE TEST | DIA AFTER TEST A | DIA AFTER TEST B | OVALITY | MAX WEAR 1 | 2.0009 | 2.001 | 1.9995 | .0015 | .001 2 | 2.0009 | 2.001 | 2.0003 | .0007 | .0001 3 | 2.0009 | 2.002 | 2.0005 | .0015 | .0011 4 | 2.0009 | 2.0015 | 1.997 | .0045 | .0036 5 | 2.0009 | 2.001 | 1.998 | .003 | .0001 6 | 2.0009 | 2.0015 | 1.999 | .0025 | .0006 CRANKPINS: No. | DIA BEFORE TEST | DIA AFTER TEST A | DIA AFTER TEST B | OVALITY | MAX WEAR 1 | 1.999 | 1.9988 | 1.9987 | .0001 | .0003 2 | 1.9991 | 1.9988 | 1.9987 | .0001 | .0004 3 | 1.999 | 1.9988 | 1.9988 | NIL | .0002 4 | 1.999 | 1.9988 | 1.9987 | .0001 | .0003 5 | 1.9991 | 1.9988 | 1.9988 | NIL | .0003 6 | 1.999 | 1.9985 | 1.9984 | .0001 | .0006 MAX CLEARANCE BETWEEN CRANKPINS & BEARINGS: No. | BEFORE | AFTER 1 | .0019 | .0023 2 | .0018 | .0028 3 | .0019 | .0032 4 | .0019 | .0028 5 | .0018 | .0022 6 | .0019 | .0031 | ||
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).