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).
Suggesting a 100-hour test for an oil pump annulus made of nickel steel to achieve a specific Brinell figure.
| Identifier | WestWitteringFiles\A\June1917\ Scan7 | |
| Date | 18th June 1917 | |
| To EFC. from R.{Sir Henry Royce} c. to J.{Mr Johnson W.M.} c. to EH. c. to By.{R.W. Bailey - Chief Engineer} ORIGINAL RL/B15:6:17. Re X.2678 - OIL PUMP ANNULUS IN NICKEL STEEL TO GIVE A BRINELL FIGURE OF 220. I think we should run this for 100 hours and then standardise it if satisfactory. This, I believe, was suggested by us to avoid certain difficulties of manufacturing the case hardened one, which I suppose still exists. We assume this will work long enough without undue wear, so that the case hardened one is really unnecessary, R.{Sir Henry Royce} STAMPED: RECEIVED 18 JUN 1917 | ||