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 characteristics for a Post-War R. Bosch Dynamo, with and without regulator control.
| Identifier | WestWitteringFiles\J\January1923\ Scan15 | |
| Date | 2nd November 1925 | |
| OPEN CIRCUIT VOLT-SPEED CHARACTERISTICS OF POST-WAR R.BOSCH DYNAMO [No 41802] Vibrator regulator controlled and uncontrolled. Y-Axis Labels: FIELD CURRENT (AMPERES) TERMINAL VOLTAGE X-Axis Label: DYNAMO R.P.M. Curve Labels: Field currents (controlled) - Cold - Hot Open-circuit voltages (uncontrolled) Open circuit voltages (controlled) - Hot (72°C) - Cold (19°C) Handwritten Notes: X.4588. A.V.A 12-2-25. F.F.S. 2/11/25 | ||