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).
Magneto models submitted by the Watford, Conner, and B.T.H. companies for consideration.
| Identifier | ExFiles\Box 4\5\ 05-page131 | |
| Date | 1st January 1921 | |
| Contd. -3- EFC1/T1.1.21. bench testing work on these 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-Hold (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-Hold (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-Hold (4) The B.T.H. Company have submitted to us one or two of their recent 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 obtain. This magneto will have moving pole pieces. We are arranging for them to send say two of these machines, one for experimental test and to be submitted to Mr. Royce for examination, and one for test on the car. The details of this magneto they will be shortly sending us and these will be sent on to Mr. Royce for his consideration. We visited the B.T.H. magneto works at Contd. | ||