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 investigation and repair of customer dynamos overheating due to an old method of commutator undercutting.
| Identifier | ExFiles\Box 47\4\ Scan179 | |
| Date | 2nd May 1924 | |
| Contd. -2- EFC/T2.5.24. We may also here remark that we have not yet had a returned dynamo for investigation which has had the commutator undercut, even by the present method. We think we may be able to demonstrate on these customers' machines at present in our hands that the fault of overheating is definitely due to the old method of undercutting, the first commutator on the drop test showing up definitely badly. When we return these customers' dynamos to Production (BY.{R.W. Bailey - Chief Engineer}) it will now be understood by all that they do not purport to be in O.K. condition. What we are asked to do by BY.{R.W. Bailey - Chief Engineer} is to examine the cause of the failure, but in order to do this it is first necessary to have the armature connections made sound in our Expl. shop. We then send BY.{R.W. Bailey - Chief Engineer} a report of what we consider to be the failure, adding a recommendation of any special work we consider should be done to the machine again to make it right for the customer. Finally BY.{R.W. Bailey - Chief Engineer} will instruct the Production Dept. to make this dynamo sound generally, and according to our special recommendations and production test, before being replaced on a customer's car. EFC. | ||