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).
Continuation of a table detailing specifications for various starter motors.
| Identifier | ExFiles\Box 61b\3\ scan0206 | |
| Date | 10th November 1927 guessed | |
| -2- Starter Motor Tables - Contd. MOTOR. X.4342V. C.A.V. SC. X.4342S Smith S5 X.4384 R.R. Goshawk X.4342L Lucas. FIELD CIRCUIT. No. of wound poles: 4, 4, 4, 4 Size of conductor: -, -, -, - No. of turns per coil.: -, -, 5.5, - Arrgt. of coils.: 2 S. 2 P., All in series, -, - Resis. of field circuit (ohms at 18°C).: .0070, .0213, .0064 (20°C), .0088 ARMATURE CIRCUIT. Type of winding.: Ret. wave, Ret. wave, Ret. wave., Prog. wave. No. of slots.: 25, 13, 29, 29 No. of conductors.: -, -, 116, - Conductors per slot: -, -, 4, - Coils per slot.: 1, 1, 1, 1 No. of coils or comm. bars.: 25, 13, 29, 29 Turns per coil.: -, -, 2, - Virtual conductors: 50, 26, 58, 58 Winding pitch in virtual cond's.: 13 & 11, 7 & 5, 15 & 13, 13 frd. 11 b'd.{John DeLooze - Company Secretary} Step or winding pitch in slots.: 6 (1 to 7), 3 (1 to 4), 7 (1 to 8), 6 (1 to 7) Size of conductor (sq.").: -, -, -, - Resis. of armature circuit between appropriate comm bars (ohms at 18°C): .0125, .0180, .0205 (20°C), .0098 Ratio of field resis. to armature resistance.: .560, 1.180, .312, .898 | ||