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).
Wiring diagram showing winding directions and connections of auto-switch units.
| Identifier | ExFiles\Box 59\1\ Scan263 | |
| Date | 4th February 1928 | |
| TO DYNAMO TERMINAL C TO EARTH RES. WINDING SHUNT WINDING FROM DIS. BOX TERMINAL C FROM DIS. BOX TERMINAL B. WINDING DIRECTIONS CONNECTIONS OF R.R. AUTO-SWITCH UNITS. F.J.A 4.2.28. | ||