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).
Details on electrical connections, battery specifications, starter motor design, and auxiliary apparatus.
| Identifier | ExFiles\Box 61\2\ scan0122 | |
| Date | 26th May 1919 | |
| Contd. -2- the connections provided being only those for the dynamo, battery, head lamps, side lamps, and tail lamp. The additional connections taken from the distribution board will be as follows:- (a) Klaxon horn connection, (b) Starter motor relay circuit connection. (c) Body lighting connection. (d) Spare connection. (e) Non-trembler ignition connection. BATTERY.- The battery will be of Chloride make type 6 BXE 5, 50 ampere hour rated capacity. This battery is a sound looking battery consisting of 6 ebonite cells. We have had excellent results on test from a battery of this type. The vents are very good from the point of view of preventing acid coming out of the cells when on charge, and yet when removed allow of easy inspection, filling, density readings etc. This battery as compared with others, is particularly good for giving a large number of starts on one charge. The battery will be used and put in a box made by R.R. and secured to the running board. STARTER MOTOR.- The starter motor will be of R.R. design and make, and a very good sound job altogether. It is provided with twice the usual brush contact area of most motors, and its windings are so arranged that the starting current, although ample for turning the engine at sufficient speed for an easy start, is not excessive at the instant of switching on. AUXILIARY. APPARATUS.- The starting current for the motor is switched on by means of an electrically operated main switch. This is operated by a relay current which is caused to flow upon the driver depressing a push button switch fitted on the dash board. | ||