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 performance, filter options, and test results for the 3.B.IV engine.
| Identifier | ExFiles\Box 82\5\ scan0142 | |
| Date | 29th May 1937 | |
| Hs.{Lord Ernest Hives - Chair} from Rm.{William Robotham - Chief Engineer} 200a Rm{William Robotham - Chief Engineer}5/R.29.5.37. 3.B.IV. BEARINGS. Filter is probably responsible for reduction in scoring of bearings. Absence of hammering out of mains is vital feature. Also no movement of bearings in the case. We propose to standardise without filter because scorring, though unsightly, cannot be detected by the customer. Next car runs with a By-pass filter we brought back from U.S.A., which should give better results than the full flow filter used on this test at a fraction of weight and cost. We do not agree that 3.B.IV engine was rough at the conclusion of test. Rm.{William Robotham - Chief Engineer} | ||