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).
Continued memorandum discussing adjusting magneto voltage and diagnosing errors in generators or voltmeters.
| Identifier | ExFiles\Box 33\5\ Scan007 | |
| Date | 24th June 1919 | |
| Contd. -2- R5/IB24.6.19. In other words, if it were correct at 1000 revolutions, it might be incorrect at 2,000 revolutions. By using a certain amount of resistance in the circuit, the voltage of the magneto could be adjusted correctly for each speed, and if the current were known, by taking the ohmic resistance of the voltmeter and the potential required for the indication, then one could find the percentage of error in the pair of instruments, and also whether the error was in the generator or the voltmeter. When you have done this, I should like the generator sent to me, to see whether it is of reasonable weight and size. FHR. | ||