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).
Extract from a report discussing and comparing various types of magnetos from different manufacturers.
| Identifier | ExFiles\Box 48\3\ Scan069 | |
| Date | 1st January 1921 | |
| X.4210 - Magnetos - Extract -3- Contd. KFC1/T1.1.21. attention because of doubt as to whether they would excel our present standard. This, however, is an incorrect impression on his part, it having been stated that they have been given relatively little attention, first, owing to lack of facilities for bench testing work on this machines; secondly, owing to the great pressure of other work in the general Expl. Dept. and the few experimental cars available for such tests. X.4181. (2) The Watford Company have recently put on the market their E.O'6 type of magneto with movable pole sleeves for advance and retard, particulars of results of bench tests of which have already been issued. The Watford Company have a still further improved model than this E.O.6 in hand for us at the present moment. X.4210. (3) The Conner Magneto Company have recently submitted to us a magneto of their C.M.1 type, containing a device in the form of a short-circuited copper winding on one of the pole tips for allowing the flux to be drawn round by the armature at slow speeds, but preventing this at high speeds, and for this they claim good slow running results. This magneto has yet to be investigated. X.3515. (4) The B.T.H. Company have submitted to us one or two of their recently models, but they have quite recently offered us a still newer model which shows promise of being as good a British six-cylinder magneto as it would be possible to obtaine. This magneto will have moving Contd. | ||