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).
Page 2 of a document detailing the conditions for correct operation of two electrical circuits.
| Identifier | ExFiles\Box 64\3\ scan0106 | |
| Date | 1st February 1927 guessed | |
| -2- Contd. The conditions of correct operation as regards this first circuit will therefore be :- (a) The actuator box must be capable of doing all that is required of it with a current of 15.5 amperes through its coils. (b) With a current of 15.5 amperes through the t-eazer main and armature windings of the motor in series, the motor must be certain of turning (slowly) in all circumstances, and duly operating the pinion operated switch. (c) 20 amperes of current must be capable of passing through the top contacts of the relay switch and one set of contacts of the push button switch with no unsatisfactory result. Circuit 2. MAIN SWITCH. (Yellow). The pinion engaging motion due to the slow initial motor rotation operates a switch which completes the final connection to earth of circuit 2. This circuit consisting only of the main switch coil with the non-inductive resistance in parallel is supplied through the push button switch. The supply voltage may be considered to be 10½. The estimated resistances at 45°C are as follows :- Main switch coil 4.09 ohms. Parallel non-inductive resistance. 10.21 " AT 10½ VOLTS. Compounded resistance. 2.92 " The amperes at 10.5 volts through the main switch coil will be 2.57. The conditions as regards correct operation of this second circuit are therefore :- Contd. | ||