Uploaded November 2017 | Updated September 2026, 3 days ago

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So,in this video,we are just giving a basic machine a run up.

At a certain RPM,we get a loud whistle from the magneto.
Not sure if it's anything special,or just a resonant vibration.

Anyway,at full speed,we have 820 odd volts AC,and a frequency of just over 1KHz.