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 results page detailing secondary resistance, temperature, current, and speed measurements.
| Identifier | ExFiles\Box 163\7\ img128 | |
| Date | 10th October 1930 guessed | |
| -3- (6) (a) Secondary resistance after test :- 7430 ohms. Corresponding temperature :- 232 ºC. Primary current at end of test :- 1.275 amperes. Ambient temperature:- 20 ºC. (b) Secondary resistance after test :- 7100 ohms. Corresponding temperature :- 210 ºC. Primary current at end of test :- 1.72 amperes. Ambient temperature :- 18 ºC. (7) Test voltage on secondary — not easily measurable as coil is sealed up in case. Test OK. (8) Speed. Current (amperes) 200 1.011 300 .944 400 .868 500 .815 600 .768 700 .715 800 .664 1000 .582 1200 .533 1400 .465 1600 .419 1800 .358 | ||