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).
Comparison and specification report on various magneto models, including the ELO.6, EO6, and ZR.6.
| Identifier | ExFiles\Box 49\5\ Scan172 | |
| Date | 31th July 1922 | |
| Contd. -3- EFC1/T31.7.22. to prevent the pull on the timing lever ring from being transmitted to the control lever. Further, the bush on the contact breaker lever is now made of continental bakelite. The ELO.6 magneto is a machine with an altogether larger armature, this having flat screw terminals on distributor cover which cover is secured by four screws instead of two. A long bolt runs through the top of the machine and clamps the magnet between the front and rear end plates. There is a plate which prevents the revolving armature being exposed unless the magnets are removed. The machine has a larger contact breaker spring than the EO6 and the contact lever bush is made of continental bakelite, but the rubbing block is still of red fibre. The machine is, of course, a sleeve type magneto. As regards noisiness of operation of the two machines, the U.S.A. Bosch appears to be reasonably silent. The EO6 is fairly quiet, the majority of the noise coming from the contact breaker. The ELO6 machine is rather noisy at high speeds, chiefly due to contact breaker and movable sleeves. (3) The radial air gaps between the armature and pole pieces we find to be :- ZR.6. .003" EO6. .006" both between the armature and sleeve and between the sleeve and main poles. ELO.6 Unobtainable. (4) The lengths of the H.T. safety gaps are :- ZR.6 8.6 mm. EO.6c 7.6 mm. ELO.6 10 mm. Contd. | ||