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).
Preliminary report on the U.S.A. Bosch Magneto B.6, detailing its design differences, weight, and components.
| Identifier | WestWitteringFiles\E\November1920\ Scan68 | |
| Date | 19th November 1920 | |
| X 1723 COPY. Nov.19th 1920. EFC. P.A.42. X.3917 - PRELIMINARY REPORT ON U.S.A. BOSCH MAGNETO B.6. X.1723 In design, this machine differs greatly from the other U.S.A. Bosch magneto (Z.R.6) that we have. Its weight is 11 lbs. that is 11 ozs. lighter than the standard Watford. The armature and magnets are of the usual design, but the workmanship in places is poor. The pole shoes are solid soft iron, and are cast in the sides of the body which is of aluminium. At the pulley end is the distributor. This is mounted on an extension of the body, and revolves in a horizontal plane, like a battery ignition distributor, driven by a small worm gear, the worm being keyed to the shaft just before the pulley, and separated from it by a screwed on cover. The distributor itself is small, and of the jump spark type; the high tension current being conveyed from the slip ring by a flexible lead. This method of driving, and distribution would probably result in the machine running quieter, besides a reduction in weight, but in this particular case the rotor turns rather stiffly. Very short cams are used, the contact breaker generally being similar to the Watford. Contd. | ||