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 showing the open circuit volt-speed and short circuit ampere-speed curves for Watford and Lucas magnetos.
| Identifier | ExFiles\Box 40\2\ Scan212 | |
| Date | 14th June 1937 | |
| O.C. VOLTS S.C. AMPERES LUCAS No 53 VOLTS AMPERES WATFORD No 98201 OPEN CIRCUIT VOLT-SPEED AND SHORT CIRCUIT AMPERE-SPEED CURVES OF PRIMARY WINDINGS OF WATFORD EOG (SLEEVELESS) AND LUCAS ERG MAGNETOS. SPEED r.p.m. rb.{R. Bowen}112 ROLLS-ROYCE LIMITED DERBY R.A.F. No. 14 JUN 1937 | ||