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).
The Smith Type 2D Dynamo with R.R. modifications, specifically dynamo number 2083.
| Identifier | WestWitteringFiles\F\April1921\ Scan70 | |
| Date | 18th April 1921 | |
| To R.{Sir Henry Royce} & E.{Mr Elliott - Chief Engineer} from EPC. c. CJ. & FN. c. By.{R.W. Bailey - Chief Engineer} & Rn.{Mr Robinson} c. Da.{Bernard Day - Chassis Design} & EP.{G. Eric Platford - Chief Quality Engineer} c. EWT. for R.R.Inc. ORIGINAL X.295 - SMITH TYPE 2D DYNAMO WITH R.R.MODIFICATIONS. We have recently received from Messrs. Smith a second type 2D dynamo with R.R. modifications. The first one received, it will be remembered, was put on 4 EX and went to U.S.A. This dynamo No. 2083 comprises the latest improvements including coned armature shaft, looking from commutator end (enabling the armature shaft to be easily slipped in and out of the commutator bearing and held in position by a nut on the end of the shaft), squared shanks to the terminals and clips for holding loose leads inside the dynamo. There is also tapered armature shaft for pulley. The small plates covering the bearing on the outside of the aluminium end plate are held in position by studs and nuts, which nuts on the commutator end of the machine foul the brush gear cover when this is being removed. The studs and nuts at the pulley end prevent the pulley from being fitted close to the dynamo end plate. The nuts could be smaller. The dynamo is well finished and has a pleasing appearance. Messrs. Smith state that they have embodied all the latest improvements for ensuring silence. We find the machine, on the bench, to be almost perfectly silent as regards electrical hum, but it appears that they have obtained Contd. | ||