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 of open circuit volt-speed and short circuit ampere-speed curves for the primary winding of a Watford E.D.6.L Magneto.
| Identifier | ExFiles\Box 48\2\ Scan262 | |
| Date | 4th April 1925 guessed | |
| X41814 O.C. VOLTS S.C. AMPERES AMPERES VOLTS OPEN CIRCUIT VOLT-SPEED AND SHORT CIRCUIT AMPERE-SPEED CURVES OF PRIMARY WINDING OF WATFORD E.D.6.L MAGNETO No 7347X SPEED R.P.M. | ||