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).
Failed dynamo, detailing its examination and suggested troubleshooting steps.
| Identifier | ExFiles\Box 47\4\ Scan146 | |
| Date | 27th December 1923 | |
| V4385 EFC. BY8-P27.12.23. 54-S.5. HARRISON. DYNAMO. I have received a Dynamo from EP.{G. Eric Platford - Chief Quality Engineer} taken from the above car, which has been replaced, owing to the owner complaining that the Dynamo had entirely failed - a replacement has already been sent. EP.{G. Eric Platford - Chief Quality Engineer} remarks in connection with the failure itself are as follows;- "We have examined and tested the returned dynamo "No.184 and find it faulty. The solder has melted "out of several armature bar connections of the "commutator, this being due to excessive heat, "possibly caused by the slack connection of the "coil lead and positive brush holder, as this is "quite slack, the nut and bolt turning quite easily. "The aluminium end cover is also badly damaged, and "no driving pinion is fitted to the dynamo". My suggestions are that we should resolder the connections on the armature, but should not touch the brush connections in any way. Having put the armature right, or alternately having fitted a new Armature from another machine, we should then run the Dynamo as a unit and check the output. If this is high then the various connections could be checked to ascertain whether the fault is actually in the Dynamo, or whether on the other hand, it is possibly a loose main connection on the Distributor Board, or a poor connection on the Battery which is the cause of the trouble. If you will send your boy round to my office I will hand him the Dynamo in question. BY.{R.W. Bailey - Chief Engineer} By | ||