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).
Ignition timing diagram for the F.A.C. 10 engine, showing degrees of advance.
| Identifier | ExFiles\Box 65\1\ scan0221 | |
| Date | 26th September 1928 | |
| DEGREES OF ADVANCE ON ENGINE -20 -10 0 10 20 30 40 50 HAND ADV. BATTERY IGNITION 30° HAND ADV. MAGNETO 15° FULL BATTERY RETARD 0° FULL MAG RETARD 5° SYNCHRONIZATION OCCURS AT MIDDLE OF TRAVEL IGNITION LEVER TRAVEL RETARD ADVANCE AUTO ADVANCE RANGE 25° 45° FULL ADVANCE A.T.C. B.T.C. IGNITION TIMING DIAGRAM FOR F.A.C. 10 ENGINE TO R.L.M. 19-9-28 H.E.W 26-9-28 | ||