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 output speed curves for a Lucas E.575 Dynamo under various connection configurations.
| Identifier | WestWitteringFiles\C\May1919\ Scan56 | |
| Date | 6th May 1919 | |
| E.{Mr Elliott - Chief Engineer} MAIN AND CONTROL CURRENTS (AMPERES) DYNAMO SPEED (R.P.M.) OUTPUT SPEED CURVES OF LUCAS E.575. DYNAMO variously connected supplying 6 fully charged large capacity cells in series (a) As Plain shunt machine (b) Control brush directly connected to negative brush (c) Correctly connected (d) Negative brush disconnected. (e) Plain shunt, control brush used as negative brush. (e) Control current (b and c) (a) X | ||