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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Old Coil Ignition Points Identification
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<blockquote data-quote="oexing" data-source="post: 108599" data-attributes="member: 1493"><p>I fail to see the drama with contact settings on a mag. A good mag should produce great high tension when spinning, the higher speed the better. And on a twin engine not the least critical , I say. But then the rotating coil Lucas was never really great at that, the later type rotating magnet should be superior for more than one reason. </p><p>Now look at this magneto from a 9 cylinder radial engine, one contact breaker, one coil, one capacitor, nine lobes . Max. speed on that engine is 3000 rpm, the crank is the limiter here. This mag will do half inch sparks when spun with fingers only , definitely, and that is my test for finding shot coils there. Dwell angle in a twin magneto should never be that critical, but if actually so, I´d suspect shot bearings and fits in the magneto in various places instead. </p><p></p><p> Vic</p><p></p><p>[ATTACH=full]28226[/ATTACH]</p><p></p><p></p><p>[ATTACH=full]28227[/ATTACH]</p></blockquote><p></p>
[QUOTE="oexing, post: 108599, member: 1493"] I fail to see the drama with contact settings on a mag. A good mag should produce great high tension when spinning, the higher speed the better. And on a twin engine not the least critical , I say. But then the rotating coil Lucas was never really great at that, the later type rotating magnet should be superior for more than one reason. Now look at this magneto from a 9 cylinder radial engine, one contact breaker, one coil, one capacitor, nine lobes . Max. speed on that engine is 3000 rpm, the crank is the limiter here. This mag will do half inch sparks when spun with fingers only , definitely, and that is my test for finding shot coils there. Dwell angle in a twin magneto should never be that critical, but if actually so, I´d suspect shot bearings and fits in the magneto in various places instead. Vic [ATTACH type="full"]28226[/ATTACH] [ATTACH type="full"]28227[/ATTACH] [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Old Coil Ignition Points Identification
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