Why do spinning van roof vents work better?

Oct 25, 2018 18 Replies

Why are these fitted instead of just a stationary vent like you see on caravans?



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I don't see the point in using the wind to power a vent, when the air was already moving. Surely that's like fitting a generator to your bicycle to power a motor to make you go faster?


As it spins I think it disperses driver/passenger farts far more efficiently.

Yes I know they claim to be more efficient, but why? How can you take power from the wind to then give it back to make it faster? Isn't that breaking the laws of physics?

Is there a special catalyst inside it for that?

They are powered by the wind that is blowing, not wind they are making.

In the case of the van, they are powered by the wind pressure the van creates when moving.

Like? I wasn't doing anything else at the time, I was waiting for someone to answer their door.

Why not just channel the blowing wind where you want it instead of converting energy twice?

The above link claims it works when stationary too (by wind).

I'd just open the window (with a rain guard of course).

Another Hucker troll.

No, a question. But despite having a van half your working life, you couldn't answer it. Mind you, you admitted you couldn't even reverse it!

Gym Sulkinson Fork and Joe Silkinson Spoon now added to killfile to join Jimmy Wilkinson Knife (originally James Wilkinson Sword).

Oh Dave you're so clever. Except for one thing. It changes nym when some idiot proclaims to the world he's killfiled him. Do it silently like intelligent posters.

??? Because it creates suction where there was none before?

You just made me think of a naked woman kneeling in front of me :-)

You are one sad sick f*ck.

yes but it gives him a bit of trouble and maybe he'll run out of nyms that tell the world who he is. Even if I hadn't posted there are still plenty of other idiots who get drawn in. But I'll keep quiet for his next one.

There are infinite combinations of letters.

You just called yourself an idiot.

Don't talk about me in the third person.

It's "off", and I wasn't talking to you.

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