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).
Car dynamo design, specifically coil and slot configurations and the stamping of plates.
| Identifier | WestWitteringFiles\Q\April1927-June1927\ 39 | |
| Date | 29th April 1927 | |
| TO EFC. FROM R.{Sir Henry Royce} Copy to BJ. ORIGINAL. R10/M29.4.27. CAR DYNAMO. X8671 Regarding your latest reports of 56 coils and 28 slots being superior to 58 coils and 29 slots, while I agree with this I should like you to consider as to whether the 57 coils (or 55 coils as the case may be) could not be put in 57 grooves, because it may be possible to make even a machine of still better performance, with larger number of narrower slots. At Royce Ltd. we have always carried this as far as has been found practical, and we doubt if it would be practical to use single coils per slot on the car dynamo. The stamping of plates has been so much improved that what may have been considered impractical some years ago may now be found possible. It will be remembered that the plates which are grooved before they are built up do not require any insulation between the plates other than the natural scale on the sheet steel, or at most a coat of varnish. R.{Sir Henry Royce} | ||