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).
Extract discussing the standardisation of laminated dynamo and motor poles to solid poles for cost savings.
| Identifier | ExFiles\Box 61b\3\ scan0178 | |
| Date | 8th December 1926 | |
| X5820 Extract from:- EFC5/T8.12.26. DYNAMO & MOTOR POLES AND ARMATURES. X.8660. 20 HP. DYNAMO. X.4638. X.5660. Field poles of this machine are laminated, but a test is being made on solid poles on the strength of which a standardisation sheet for solid poles is being circulated, as it is said that a saving of 6/4d. would result. 20 HP. STARTER MOTOR. X.4132. X.5620. This has laminated pole pieces, and it has been suggested by Mr. Clough in his By/Cgh{W Clough}21/G3.12.26, that we should also use solid pole pieces on this motor, and that he proposes to instruct same experimentally with a view to standardisation. In view of our results on the 6" 40/50 motor, we do not consider it necessary to make brake efficiency tests, but regard the matter wholly as one of manufacturing costs. The change should therefore be decided on that basis. EFC. | ||