3 top ends with cranks driving a gear each these three gears drive a central main gear that is more like a rotor (3 firings per rotation)
the 3 cranks are working as we know they do = clockwise the center / rotor is spinning non clockwise this central gear powers (or is powered by) - the bottom end - the ignition - the starter via those 2 gears
looks like work in progress wow
where is the power for the ignition coming from…?? battery I guess but powers the battery