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).
Suitable resistance value for the dynamo field as governed by the regulator.
| Identifier | ExFiles\Box 166\2\ img247 | |
| Date | 24th January 1939 | |
| 6092, To By/RD. Rm{William Robotham - Chief Engineer}/RC.{R. Childs}14/JH.24.1.39. re regulators. With reference to your memo. By/RD.2/B.20.1.39. the most suitable value for the resistance of the dynamo field as governed by the regulator, applies equally to either type of unit. It is permissible to increase this value to 7 ohms, but we must keep to the existing minimum limit. Rm{William Robotham - Chief Engineer}/RC.{R. Childs} | ||