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).
Instructions on operating the magneto ignition and managing fuses when running without a battery.
| Identifier | ExFiles\Box 51\2\ Scan118 | |
| Date | 6th July 1923 | |
| Contd. -2- EFC {E. Fowler Clarke - Electrical Engineer} 3/T6.7.23. their hands. To enable the magneto ignition to be put into action, the ignition switch must be put in position I and to guard against the battery ignition being supplied with current (as usual) in this position, the instruction will include the removal of the fuse marked No.3 in the distribution box. The instruction must make it abundantly clear, however, that in this condition of running without a battery, the switch must not be put in the I and C position. Alternatively it may be preferable to give an additional instruction to remove fuse No.2 in addition to No.3, in which case it would not then matter if the switch were put in position I and C. This may be considered preferable. The above is assuming that no lighting is required. If, however, it is necessary to move a car without a battery after dark this can only be done at a risk of burning out the lamps. As explained in EFC {E. Fowler Clarke - Electrical Engineer} 2/T5.6.23, and particularly EFC {E. Fowler Clarke - Electrical Engineer} 2/T16.6.23, all the lamps should be switched on and the car should not be driven at a greater speed than 13 m.p.h. It must be distinctly understood that this procedure is only recommended in great necessity and that a fair risk of burning out the lamp bulbs is taken unless the car is driven very carefully. In this case, of course, fuse No.2 should be allowed to remain in position. EFC. {E. Fowler Clarke - Electrical Engineer} | ||