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 winding configurations of C.A.V. and R.R. starter motors.
| Identifier | ExFiles\Box 34\3\ Scan155 | |
| Date | 8th April 1918 | |
| Contd. -2- EFC5/T8.4.18. distinct similar windings in parallel with one another, one above the other in the slots. We have now ascertained, however, that the winding is not like this, but that every coil in the lower winding is in series with the corresponding coil in the upper winding in such a manner that every compound coil consists of two turns, or four conductors in series. Each conductor consists of a flexible strand of nine round wires in parallel. As regards the field winding of the C.A.V. motor, the four coils are, as stated in our previous report, two in series and two in parallel. With regard to the R.R. starter motor with the 45 slot armature and the field coils two in series and two in parallel, we have made a brake test of this on 12 volts, but have not, at the moment, reduced the observations. We will inform Mr. Royce of the results as soon as they are to hand. EFC. | ||