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).
Testing procedure for a dynamo and voltage regulator, detailing outputs at different voltages and conditions.
| Identifier | ExFiles\Box 166\2\ img071 | |
| Date | 5th March 1937 guessed | |
| 5. (1) Output at 13.0 volts. With the dynamo delivering current to the battery, and the regulator cold, the dynamo shall be gradually speeded up, the voltage being maintained at 13.0 by adjustment of the variable resistance. The current at 13.0 volts required to commence operation should be noted, after which the speed should be varied up to 5,000 R.P.M. the output at 13.0 volts still being observed. This should lie between 14.0 and 16.5 amperes. (2) Output at 15.0 volts. Test 1 shall now be repeated but with the terminal volts adjusted to 15.0. In this case the output should lie between 1.0 and 7.5 amperes. (3) In order to heat up the regulator, the dynamo shall now be run at a speed of about 2,500 R.P.M. delivering current at 13.0 volts, for a period of 2 hours. At the end of this run tests, 1 and 2 should be repeated, the corresponding values being :- (1) Output at 13.0 volts to 15.0 to 18.5 amperes. (2) Output at 15.0 volts to 3.5 to 10.5 amperes. NOTE. The standard chassis ammeter specified above, is for the purpose of measuring the effect of regulator operation, on the ammeter indications. The regulator causes the ammeter needle to oscillate more or less. The chassis instrument should be kept under observation and the amplitude of the | ||