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).
Curve showing the variation of O.C. volts with cam lever position for a Watford E06A Magneto No 73970.
| Identifier | WestWitteringFiles\N\2October1925-December1925\ Scan277 | |
| Date | 27th November 1925 | |
| WATFORD E06A MAGNETO No 73970. CURVE SHOWING VARIATION OF O.C. VOLTS WITH CAM LEVER POSITION. NOTE. SLEEVES RIGIDLY CONNECTED TO LEVER. VOLTS (SPEED CONSTANT). 8.0 7.5 7.0 POSITION OF MAXIMUM FLUX THROUGH ARMATURE. ADVANCE 10° 20° 30° 40° 50° RETARD. LEVER POSITION. H&W 23-11-25 E.7.C 27/11/25 | ||