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).
Page detailing experimental suggestions for motor field windings and mechanical parts.
| Identifier | ExFiles\Box 64\2\ scan0168 | |
| Date | 30th June 1928 guessed | |
| -3- Contd. the motor when working normally turning the engine on the main supply. Though it is not mainly a question of the preliminary engagement we consider it desirable to retain the longitudinal movement in the same plain bearing so that we can observe the effect on the law of longitudinal pull with current for the various field windings for which we ask. We wish to experiment with main field windings of type similar to the present with 3½, 4½, 5½ and 6½ turns per pole, the teazer winding remaining of the same size and number of turns. It might be suggested that we should obtain more space for the main field winding by reducing the teazer and that may be possible at a later date. The right method of procedure is considered to experiment on the varying number of main field turns, and if subsequently we can reduce the space occupied by the teazer winding, 'we then know that, having secured the right number of turns, we can definitely effect further improvement in the motor, by subsequently reducing the teazer winding and thereby increasing the section of that (same) number of main turns. In regard to other features of this experimental motor, we suggest the following:- (1) Mechanical parts of the motor need not be finished off or plated. (2) The armature operated switch and mechanism can be entirely left off. (3) The armature return spring and pinion need not be fitted, but suitable provision must be made on the motor spindle for our brake wheel adaptor. | ||