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).
Wear measurements recorded during endurance tests for a Wraith Bakelite Oil Pump.
| Identifier | ExFiles\Box 149\2\ scan0190 | |
| Date | 21th March 1939 | |
| 21-3-39 WRAITH BAKELITE OIL PUMP WEAR MEASURED DURING ENDURANCE TESTS DRIVING GEAR Diagram labels: U, V, W, X, Y, Z DRIVEN GEAR Diagram labels: J, K, L, M, N DRIVING GEAR TABLE TOTAL TIME RUN IN HOURS | UU | VV | WW | XX | YY | ZZ 2 | -.0002 | -.0002 | -.0003 | -.0002 | -.0003 | -.0002 52 | -.0003 | -.0002 | 0 | -.0002 | -.0004 | +.0002 152 | -.0004 | -.0003 | 0 | -.0002 | -.0005 | +.0002 652 | -.0006 | -.0006 | 0 | -.0004 | -.0005 | 0 DRIVEN GEAR TABLE TOTAL TIME RUN IN HOURS | JJ | KK | LL | MM | NN 2 | -.0003 | -.0003 | 0 | 0 | +.0003 52 | 0 | 0 | +.0003 | +.0003 | +.0001 152 | -.0001 | 0 | +.0004 | +.0003 | -.0001 652 | -.0003 | 0 | +.0007 | +.0006 | -.0006 WL BL2317/B | ||