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 characteristic of a Bosch Dynamo and Carbon Granule Regulator.
| Identifier | WestWitteringFiles\F\February1921\ Scan103 | |
| Date | 15th December 1926 | |
| OPEN CIRCUIT VOLT-SPEED CHARACTERISTIC OF BOSCH DYNAMO AND CARBON GRANULE REGULATOR FIELD AMPERES O.C. VOLTS DYNAMO R.P.M. Regulation Begins O.C. Volts Regulated Field Current E.7 15/12/26 | ||