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).
Page from a test report detailing electrical and temperature measurements over time.
| Identifier | ExFiles\Box 61b\4\ scan0147 | |
| Date | 19th October 1927 guessed | |
| - 3 - TIME CURRENT TEMP. C. VOLTS ACROSS TERMINALS ROOM TEMP. 330 min. 4.1 74.5° 6.75 25° 360 " 4.1 75 6.75 24° The voltage at the terminal of the battery varied between 7.5 and 7.6. The coil is unharmed by this test. O COPY | ||