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 curves for a Lucas E.575 Dynamo under self-excitation.
| Identifier | WestWitteringFiles\C\May1919\ Scan53 | |
| Date | 5th May 1919 guessed | |
| LUCAS E.575. DYNAMO Open circuit volt curves Self Excitation (a) As plain shunt machine (c) Controlled A B VOLTAGE (CURVES A) VOLTAGE (CURVES B) (c) (a) 720 R.P.M. 760 R.P.M. 13.5 VOLTS DYNAMO SPEED (R.P.M.) E7C E/575/1B | ||