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).
Measurement record for the resistance of an EAC S+ motor main field winding.
| Identifier | ExFiles\Box 64\1\ scan0174 | |
| Date | 20th March 1924 | |
| X.9620. EFC. PC.39. Mar. 20th 1924. RESISTANCE OF EAC. S+ MOTOR MAIN FIELD WINDING The resistance of the above winding is .01312 ohm at 16.5°C. Instruments used were:- No.22407 on millivolt range. No.42 on 1.5 ampere range. CAP. | ||