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 B.T.H. and Watford magnetos.
| Identifier | ExFiles\Box 4\5\ 05-page353 | |
| Date | 1st December 1925 guessed | |
| K8722 WATFORD EQL4 No 73470 VOLTS B.T.H. NO 206071 B.T.H. NO 35047 AMPERES OPEN CIRCUIT VOLT-SPEED AND SHORT CIRCUIT AMPERE-SPEED CURVES OF PRIMARY WINDINGS OF B.T.H. PM6 AND WATFORD EQL 4 MAGNETOS VOLTS ------- AMPERES ----- SPEED rpm DC VOLTS DC AMPERES REF K.F.13.B | ||