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 C.A.V. motor for the Goshawk II.
| Identifier | WestWitteringFiles\G\October1921\ Scan34 | |
| Date | 31th October 1921 | |
| 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 Ry. & EP.{G. Eric Platford - Chief Quality Engineer} c. to R.R. of America. ORIGINAL CT/T31.10.21. X.4342M - C.A.V. MOTOR FOR "GOSHAWK" II. This motor has a neat appearance, being of nickel-plated finish like the Lucas machines. The finish of the machine is fair. Solid pole shoes secured by one screw only are used, and the brush gear and connections are as used in the SB{Mr Bull/Mr Bannister} machine, sample of which we have in connection with the 40/50 chassis, but rather better finished off. The brush gear and connections are of the same design, with a few minor improvements. In this design the brush is rigidly fixed to the arm and the arm pivoted radially under the action of the spring. The brush gear and connections generally appear otherwise to be quite wound, though not of a high state of finish. The brushes are of the C.M.3 quality Morganite, and owing to the particular design of brush gear the brush bedding may not be thoroughly good, though apparently quite satisfactory on test. Four brushes are provided at 90°. The bearing end plate is of gun-metal nickel plated. The commutator end plate is of some aluminium alloy. The main terminals are on the carcass proper and at a satisfactory distance from one another. The armature is quite neatly finished and the commutator looks a sound job. Ball bearings are provided at either end and oilways are Contd. | ||