It's actually pretty simple and old school tech. INside of the pole holding the fans it has a pattern that when getting hot expands. Together with gravity in now starts spinning and with every spin it starts going faster.
Majority counts I suppose. Would be interesting to see if it is different per state though.
It's actually pretty simple and old school tech. INside of the pole holding the fans it has a pattern that when getting hot expands. Together with gravity in now starts spinning and with every spin it starts going faster.