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).
Test report on electrical windings, detailing resistance, impedance, and inductance measurements.
| Identifier | ExFiles\Box 69\1\ scan0285 | |
| Date | 2nd January 1930 guessed | |
| -2- (1) Continuity of windings :- OK. (2) Quantities :- Primary resistance .93 ohms at 14 °C. Secondary " 3910 " " 14 " Primary impedance at 50 cycles. 3.23. Secondary -ditto- 13750 Primary inductance .0098 henries Secondary " 41.8 (3) Open circuit test :- OK (4) Open secondary circuit primary current :- 1.10 amperes. Short " " " :- 1.14 amperes. (5) (a) Secondary resistance after test :- 4700 ohms. Corresponding temperature :- 75 °C. Primary current at end of test :- 1.30 amperes. Ambient temperature :- 15.5 °C. (b) Secondary resistance after test :- 4650 ohms. Corresponding temperature :- 61 °C. Primary current at end of test :- 2.10 amperes. Ambient temperature :- 15 °C. Ro{C. C. Rose - Export Manager} = 3700 ohms. | ||