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 discussion on testing a machine and regulator, focusing on the performance of carbon contacts.
| Identifier | ExFiles\Box 31\1\ Scan085 | |
| Date | 1st October 1920 | |
| Contd. -4- EFC6/T1.10.20. have found that these results alter the performance of the combined machine and regulator, under otherwise similar conditions, quite considerably. This would seem to be a point against the use of such carbon contacts for vibrator regulators. We are now arranging for a rather more practical test of this machine. With the carbon contacts originally smoothed up and the machine cold and with a fully discharged battery down to about 6 volts open circuit, we are going to start by charging the battery from the machine with no appreciable resistance between their terminals, and take the record of the current delivered and the operating voltage, until the battery is fully charged, after which we shall cause the battery to be discharged at first, say, about 6 amperes, then 12, then 18, whilst the charging current is still being supplied, the object being to see how the output of the dynamo varies under these changing circumstances. EFC. | ||