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).
Continued page discussing potential modifications to a dynamo cutout system to manage voltage and output.
| Identifier | WestWitteringFiles\Q\December1926-January1927\ 107 | |
| Date | 24th January 1927 guessed | |
| -4- Contd. with some amount of flexibility so that a suitable fraction of a second of time would have to elapse before contact could be broken (and the field resistance inserted) in order that the temporary high voltage of the dynamo should not get the auto-switch over before it had time to operate the cutout. That, however, would be definitely possible. It would not require a great amount of lag because it sometimes does work correctly in the present circumstances. It is only that there is the liability with the present (unmodified) condition to start off straight away with the reduced rate of charge. An alternative way of producing the same effect is to make the contact arm separate from the armature arm in such a way that the armature has to travel some little distance before effecting separation of the contact points, in the manner of the Carpentier type trembler of an ignition coil. The provision of a unit of this nature would eliminate the difficulty of making an effective compromise on the present dynamo output curve between the high output by some considered to be desirable and the much lower output considered suitable by the battery makers. EFC. | ||