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).
Technical description of starter motor specifications and the operation of the switchboard.
| Identifier | ExFiles\Box 31\1\ Scan111 | |
| Date | 16th October 1920 | |
| -6- Contd. difficulty. The question of electrical-mechanical efficiency, has received special attention so that the Starter is able to deal with a large engine without throwing excessive strain on the accumulator. The following data refer to two sizes of machines. Type. Diameter. Torque. Suitable for engines D.R.1. 115mm. = 230 inch up to 3 litres capacity. 4.53" lbs. D.R.2. 130 mm. = 350 " over 3 " " 5.12" lbs. The Switchboard. This instrument is the centre from which all lamps as well as the starter, are controlled. It contains three switches which operate the head Lamps, the Side Lamps, and Tail Lamp. All circuits are protected by fuses, and in the case of the Head Lamps, each Lamp has a separate fuse. A centre Zero amperemeter of the moving coil type, is fitted to the front of the board and indicates the charging current in one direction, and the Lamp Load etc. in the opposite direction. There is no switch for controlling the dynamo circuit as this is not necessary owing to the automatic regulation of output. The starter is put into operation by a small push button switch whi-ch closes the relay switch circuit. A plug circuit is provided on the board so that a portable inspection lamps may be easily connected when required. The switchboard is illustrated in Fig.9. Contd. | ||