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).
Engine bearing test results for Test #7, detailing crankshaft and Allison main bearing wear measurements.
| Identifier | ExFiles\Box 173\2\ img242 | |
| Date | 27th February 1934 guessed | |
| ROLLS ROYCE ENGINE BEARING TESTS. (Continued) Test #7 Crankshaft and Bearing Wear. Journal Crankshaft #4 Crankshaft #4 Wear Allison Main Bearings No. after lapping after tests Nos. Average in tests #1,3,5,6 and 7. & before test #4 4,5,6 & 7. Av. diam. Av. diam. Before After Test #1 Wear test #1 Av. diam. Max.dia. Av. Max. 1 2.9969 2.9964 .0005 3.0010 3.0015 3.0028 .0005 .0018 2 2.9970 2.9967 .0003 3.0016 3.0023 3.0029 .0007 .0013 3 2.9969 2.9966 .0003 3.0012 3.0017 3.0027 .0005 .0015 5 2.9969 2.9965 .0004 3.0010 3.0012 3.0013 .0002 .0003 6 2.9970 2.9968 .0002 3.0012 3.0021 3.0025 .0009 .0013 7 2.9968 2.9965 .0003 3.0010 3.0012 3.0018 .0002 .0008 Center Main. 4 Before test #5 After test #7 .0002 A 2.9995 3.0024 3.0043 .0029 .0048 2.9950 2.9948 B 2.9995 3.0014 3.0018 .0019 .0023 (Note A&B are two measurements after two set-ups of bearing in case.) | ||