On Thu, 25 Oct 2018 17:11:41 +0100, Nightjar, another brain damaged,
troll-feeding senile idiot, blathered:


They are a Savonius rotor, which uses the wind to rotate a shaft. There
is a fan attached to the shaft, which, unlike a simple hole, actively
extracts air from the vehicle. They are also widely used on boats, to
keep them ventilated while sitting at their moorings.

And yet another senile idiot fell for the retarded Scottish attention
whore's latest idiotic bait, hook, line and sinker! LOL