14-09-2018, 11:13 AM
James, there will be someone who knows much more about this than I do but I do not think you need an external gearbox. Here is what that notoriously unreliable source, Wickedpedia, says about inductance type mags like the BLIC.
"One or more times per revolution, just as the magnet pole moves away from the coil and the magnetic flux begins to decrease, a cam opens the contact breaker and interrupts the current. This causes the electromagnetic field in the primary coil to collapse rapidly. As the field collapses rapidly there is a large voltage induced (as described by Faraday's Law) across the primary coil."
It seems to me that the critical thing is the relation between the contact breaker cam and the rotating magnet. In my innocence I think you can alter this by retiming the internal gears in the mag.
If I am wrong I am sure someone will rush to correct me and if I am right someone may be kind enough to be specific about how. I think some magnetos have timing marks. It seems odd to me that your mag. person couldn't fix this.
Regards,
Stuart
"One or more times per revolution, just as the magnet pole moves away from the coil and the magnetic flux begins to decrease, a cam opens the contact breaker and interrupts the current. This causes the electromagnetic field in the primary coil to collapse rapidly. As the field collapses rapidly there is a large voltage induced (as described by Faraday's Law) across the primary coil."
It seems to me that the critical thing is the relation between the contact breaker cam and the rotating magnet. In my innocence I think you can alter this by retiming the internal gears in the mag.
If I am wrong I am sure someone will rush to correct me and if I am right someone may be kind enough to be specific about how. I think some magnetos have timing marks. It seems odd to me that your mag. person couldn't fix this.
Regards,
Stuart