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).
The electrical equipment and dynamo for a Stutz car.
| Identifier | ExFiles\Box 23\5\ Scan024 | |
| Date | 16th December 1927 | |
| To R.{Sir Henry Royce} from EFC. c. PJ. E.{Mr Elliott - Chief Engineer} c. Da.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} c. Wor.{Arthur Wormald - General Works Manager} X4336 EFC2/T16.12.27. ELECTRICAL EQUIPMENT ON STUTZ CAR. Y4336 X3874 DYNAMO. (BOSCH). This is of the two-pole type with concentric armature and cast iron carcase. It has single field winding third brush control with one main brush earthed and the other connected to the cutout which is mounted on the carcase. The field circuit is from the third brush to earth, but includes in series with the coils a pair of thermostat operated contacts shunted with a small resistance so that the excitation and output of the machine is reduced when a pre-arranged temperature is attained. The thermostat arm carrying one of the contacts consists of a simple bi-metal strip. The machine has not been run, but the amount of resistance (wound on a mica strip) appears only small enough to reduce the output to not less than half. There is a good deal to be said for thermostat operated reduction of output, because - (1) More output will be given in winter months when more output is required. (2) More output will be given with frequent stops and starts, when more output is required. (3) More output will be given at night, when more output is required, because with the load of the lamps on, the battery voltage and consequent heating of the dynamo would be less. Contd. | ||