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 plotting oil relay advance curves for flywheel ignition against engine RPM.
| Identifier | ExFiles\Box 65\1\ scan0039 | |
| Date | 29th December 1924 | |
| OIL RELAY ADVANCE 29/12/24 ALUMINIUM PISTON .618 DIA OIL TEMP 50°C. OIL PRESSURE 25-32 LBS/□" FLYWHEEL IGNITION ADVANCE ENGINE R.{Sir Henry Royce} P. M.{Mr Moon / Mr Moore} SPECIFIED CURVE OBSERVED CURVE OBSERVED CURVE 45° FULLY ADVANCED 30° 30° HAND CONTROL POSITION Y-AXIS: 70, 60, 50, 40, 30, 20, 10 X-AXIS: 1000, 2000, 3000 | ||