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 modify a 40/50 dynamo by boring out the poles to increase the radial air gap.
| Identifier | ExFiles\Box 62\3\ scan0217 | |
| Date | 3rd April 1931 | |
| X.6076 RHC.{R. H. Coverley - Production Engineer} from Hs{Lord Ernest Hives - Chair}/CAP. Hs{Lord Ernest Hives - Chair}/CAP1/ADL 3.4.31. We are handing to you 40/50 dynamo V.K.55.SS.{S. Smith} which is being used on tests in connection with the new type of armature having wider slots. Will you please have the poles bored out so as to increase the radial air gap from its present dimension of .022" to .030". Completed 14/4/31. Hs{Lord Ernest Hives - Chair}/CAP. | ||