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 report detailing experiments on ignition system components.
| Identifier | WestWitteringFiles\Q\2-July1927-September1927\ 3 | |
| Date | 1st July 1927 | |
| EFC2/T5.7.27. -2- Contd. that the magneto points will not then function so satisfactorily. A set of tungsten points will be similarly experimented upon, on the battery ignitor. (21) Lever with off-set position giving slow make, and quick break. Two sets of these have been produced and one set has been fitted, together with (22) mushroom type of rotor for protection from gasses, on chassis 10-G3, but so far the mileage is comparatively small. These two experiments will be tried independently on the bench. The contact breaker with this off-set lever is very noisy and has been complained of on 10G3. (23) Slow make quick break cam. It will be remembered that it was found that this cam would not give the increase in rate of break that was expected. An experiment has, however, been run with it under otherwise standard conditions, the result of which is labelled (23). It will be seen to shew no particular difference. (26) Still finer primary coil type HP.1. We have two of these in readiness which have duly passed their preliminary tests. (25) Three-part cam. We have one of these in readiness. (27) Srubbing action for tungsten points. (As instructed by LeC.2422) Awaiting Expl. Shop. In addition to the above, one result, labelled from a 10,000 mile test run on an expl. car is to hand, this having run with double ballast and present standard finer primary coil. The result is moderately good only, it having been necessary to remove the small portion of platinum represented by the pip, on two occasions. Contd. | ||