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).
Graph showing oil relay lever angular movement against engine and governor RPM.
| Identifier | ExFiles\Box 65\1\ scan0078 | |
| Date | 31th January 1925 guessed | |
| OIL RELAY MOVEMENT. ANGULAR MOVEMENT LEVER. E.72518. 30°, 28, 26, 24, 22, 20°, 18, 16, 14, 12, 10°, 8, 6, 4, 2. INITIAL ADVANCE 1.5°. ADJUSTMENT BY WASHERS TO CUT OFF MOVEMENT AT 24°. ENGINE R.P.M. 500, 1000, 1500, 2000, 2500. GOVERNOR R.P.M. 250, 500, 750, 1000, 1250. | ||