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 comparing the open-circuit volt-speed and short-circuit ampere-speed curves for the primary windings of three different magnetos.
| Identifier | ExFiles\Box 48\2\ Scan082 | |
| Date | 13th May 1924 | |
| X-127 OPEN-CIRCUIT VOLT-SPEED AND SHORT-CIRCUIT AMPERE-SPEED CURVES OF PRIMARY WINDINGS OF BOSCH.ZF6, SCINTILLA.AM6A AND WATFORD. RO {C. C. Rose - Export Manager} 1. MAGNETOS. O.C. VOLTS. S.C. AMPERES. SPEED R.P.M. Bosch ZF6 No. 2490573. AMPERES VOLTS SCINTILLA AM6A. NO 34897. WATFORD R.O.1. No. 67642. H.E.W. | ||