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).
Specifications for a 56 coil armature with reduced teeth and heavier conductors than standard.
| Identifier | ExFiles\Box 62\3\ scan0171 | |
| Date | 2nd February 1931 | |
| X.6076 2.2.31. X.6076. 56 COIL ARMATURE WITH REDUCED TEETH AND HEAVIER CONDUCTORS THAN STANDARD. Slot width. Slot depth Centre Bottom. 40/50 late .170 .515 .600 standard with 18 SWG. conductors. 40/50 exptl. .188 .586 .680 with 17 SWG. conductors. 20/25 standard .150 .460 .535 with 19 SWG. conductors. 20/25 exptl. .166 .517 .600 with 18 SWG. conductors. EFC. | ||