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).
Required alteration to the commutator position on a 40/50 HP dynamo 28-slot armature.
| Identifier | ExFiles\Box 68\4\ scan0017 | |
| Date | 12th July 1927 | |
| To RHC.{R. H. Coverley - Production Engineer} from EFC. c. to BY/RD. X8672 EFC1/LG12.7.27. 8672 X.5661. 40/50 HP. DYNAMO. 28 SLOT ARMATURE. Herewith we hand you one of these armatures. To enable this to be entirely suitable for replacement in any standard wide brush machine, we require an alteration of the commutator position in relation to the armature of 24°. The commutator is virtually to be turned through this angle against the direction of rotation which direction of rotation is clockwise when the armature is viewed from the commutator end. EFC. Urged. c18/7/27 Urge when Shop returns | ||