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).
Comparison of field windings for starter motors A, B, and C.
| Identifier | ExFiles\Box 64\1\ scan0185 | |
| Date | 15th September 1924 guessed | |
| X.9620 X.9620. EAC.II. STARTER MOTORS A, B, and C. FIELD WINDINGS. A.{Mr Adams} This motor has the teazer and main winding wound to drawing D.70608. (Proposed standard). B. The main winding on this motor has been wound at the top of the poles. There is a slight difference in the resistance of the windings compared with motor A.{Mr Adams} owing to different formation of the layers of wire, necessitating in the case of the teazer winding more length.of wire and in the main winding less. C. This motor has the main winding wound at the bottom of the poles. The formation of the wire is the same as B. EFC. | ||