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).
Technical description and assessment of a C.A.V. Dynamo for the Goshawk project.
| Identifier | WestWitteringFiles\H\November1921\ Scan0 | |
| Date | 2nd November 1921 | |
| R.R.325V (T 20) (H 2) .386 (16-9-21) C 3008 To R & E.{Mr Elliott - Chief Engineer} from EFC. c. to CJ. & FN. c. to Rg.{Mr Rowledge} & Da.{Bernard Day - Chassis Design} c. to Ey. & EF. c. to R.R. of America Inc. EFC1/T2.11.21. X.4359V - C.A.V. DYNAMO FOR GOSHAWK. This dynamo has a similar appearance and nickel plated finish to that of the motor. The pole pieces are solid and secured to the carcase by two screws. Similar remarks given for the C.A.V. motor apply again in this instance, namely, that although the parts of the machine have not a high state of finish, nevertheless these are robust and well suited to the work they have to perform. The machine is of the single field winding third brush control type with three boxtype brush holders and brushes of the same dimensions. The quality of the brushes is E.G.C. Morganite. The commutator end cover is a hollow steel pressing which, with the exception of holes cut out for the inspection of the brushes, carries and completely encloses the brush gear. A sheet metal strip covers up these holes when inspection of the brushes is not required. The armature and commutator are reasonably well finished jobs. There is also on this machine a felt pad device preventing oil from the commutator end ball bearing from finding its way to the commutator. one main fixed terminal and the field terminal are on the carcase proper, the other main terminal is on the commutator end cover. The field coils are neatly finished, but have no other insulation between them and the field poles than that of the coils themselves. Contd. | ||