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).
Proposal to modify a 20 HP dynamo armature with steel wedges to reduce noise.
| Identifier | ExFiles\Box 165\6\ img153 | |
| Date | 9th June 1927 | |
| R.H.C. X5660 C. EFC. BY/RD5/ML.9.6.27. 20 H.P. DYNAMO. In order to cure noise it is proposed to try the effect of closing the armature slots with steel wedges in a similar manner to the use of wooden wedges to retain coils and it is proposed to try this on a 29 straight slot armature already built and which is particularly noisy. We send you herewith prints of - D.51535 - which shews what we require doing to the armature and D.51536 - the wedges required. Will you please put this in hand. We are sending the armature, loaned to us by EFC. to RHC.{R. H. Coverley - Production Engineer} for this modification to be carried out. BY/RD. | ||