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).
The performance and noise issues of a post-war Bosch dynamo with a combined regulator and cutout.
| Identifier | WestWitteringFiles\K\November1923\ Scan74 | |
| Date | 23th November 1923 | |
| ORIGINAL To E.{Mr Elliott - Chief Engineer} A & E.{Mr Elliott - Chief Engineer} from EPC. c. GJ. & PH. c. HY.{Tom Haldenby - Plant Engineer} EP.{G. Eric Platford - Chief Quality Engineer} WOR.{Arthur Wormald - General Works Manager} EFC4/T23.11.23. X4662 - POST-WAR BOSCH DYNAMO WITH COMBINED REGULATOR AND CUTOUT. Further to our EFC1/T11.9.23, this unit complete, as stated therein, has nowbeen fitted to 4-EX. The output performance of the machine so far is entirely satisfactory, the ammeter charge indication being reasonably steady and varying suitably in accordance with the state of the battery and the demand on the system. The charging current of the battery in different conditions, with no lights on, is reasonably the same as was found on the bench, and when all the lighting load is switched on, the output of the generator is still such as to cover this quite satisfactorily and give a surplus to the battery. On the other hand, the dynamo on the chassis is found to be distinctly noisy, a lot of which is aggravated by the type and condition of the belt used, but the dynamo is intrinsically noisy, and so much so, even with everything possible done to the belt, as to render this a big objection to the use of such a machine on the R.R. car. As previously reported in connection with Bosch machines, the magnetic circuit is made very efficient, i.e. so arranged that a big flux is produced for a given number of ampere turns. Further, apparently no attempt is made either on the pole pieces which are symmetrical, or the | ||