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).
List of parameters and specifications for field and armature circuits.
| Identifier | ExFiles\Box 61b\3\ scan0110 | |
| Date | 24th January 1929 guessed | |
| -2- Contd. D.{John DeLooze - Company Secretary} Field Circuit. (a) Number of wound poles. (b) Size of conductor. (c) Number of turns per coil. (d) Arrangement of coils. (e) Resistance of field circuit (ohms at 18°C) E.{Mr Elliott - Chief Engineer} Armature Circuit. (a) Type of winding. (b) No. of slots (s) (c) No. of conductors (n') (d) Conductors per slot (n'/s) (e) Coils per slot (c/s) (f) No. of coils or com. bars. (c) (g) Turns per coil. (n'/2c) (h) Virtual conductors. (2c) (i) Winding pitch in virtual conductors (z) (j) Step or winding pitch in slots. (k) Size of conductor. (l) Resistance of armature circuit between appropriate commutator bars. (ohms at 18°C.) (m) Ratio of field resistance to armature resistance:- Contd. | ||