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 analysis of a machine's output performance and operational characteristics compared to a Lucas model.
| Identifier | WestWitteringFiles\E\June1920\ Scan7 | |
| Date | 17th June 1920 | |
| Contd. -3- EFC1/T17.6.20. retarded position, and that the output performance of the machine under similar temperature conditions is very much better than that of the Lucas for a difference of weight not much more than 2 lbs. The Test Dept. have recently told us that they have found it possible to operate the ignition with the battery disconnected even though the dynamo is speeded up to such an extent that the field fuse is melted and the field circuit broken. This is, of course, due to the excitation effected by the control winding. Though we definitely state in our instructions that the dynamo should not be run with the battery removed and the charging switch on, nevertheless there is the possibility that should this be done, either intentionally or accidentally, some of the electrical system may still be operated from the dynamo if the field fuse has given out. This, although perhaps of not much importance, seems to be another argument against the use of a control winding and is a condition which would be obviated in the system of control such as is used on the Smith machines. EFC. | ||