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).
Request to manufacture a specially wound armature and a set of four trial poles for a 20/25 HP chassis dynamo.
| Identifier | ExFiles\Box 62\3\ scan0193 | |
| Date | 11th February 1931 | |
| c. EFC. X6166 BY/RD8/N.11.2.31. X. 6106 Re: 20/25 HP. Chassis - Dynamo. Will you please put in hand one armature having special winding in order to obtain greater output in accordance with our drawing D.52131 sent herewith. It is in all respects for the material required standard to LOP D.51490 for the armature, and D.51492 for the commutator. The coils for the armature should be wound to D.52132, blueprint of which is also attached herewith. Will you also please put in hand one set of four poles to blueprint D.52133 for trial on this machine. These poles are in all respects standard except that their bore has been reduced to provide a small air gap. BY/RD. [Stamp: RECEIVED 21 FEB 1931] | ||