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    Making SPARKS FLY!

    Jan 02, 2021 5 minutes
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    Following on from last time ...

    Not all flywheel magnetos overwind their Low Tension ignition coils with the High Tension winding. Another option eventually appeared, using the'ignition'winding to power an external HT coil. The most obvious way was to connect as if it was a battery, and this was incorporated into the Villiers 225cc 1 H ignition system - possibly because they chose to use the 'ignition' coil also for trickle charging. As suggested in part 1, it is a fairly obvious move.

    However, from personal experience it is apparent that an ordinary DC ignition coil does not work very well, and Villiers developed the M2533 coil especially for it. This system was not replicated for the later 250cc 2H single and 2T twins, which instead adopted an 'Energy Transfer' alternative. The generator, still referred to as a flywheel magneto on account of its big and heavy

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