fan directions?

Justin

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OK, stupid question time........

if you have a fan with no markings on it, how do you know which way it sucks/blows?

ta, JuvUK
 

AndyLandy

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OK, stupid question time........

if you have a fan with no markings on it, how do you know which way it sucks/blows?

ta, JuvUK

Power it up and point it at your face and see which way the air blows? :)
 

jvdbossc

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If you hook it up with the proper polarity the back blows air out.
 

keropi

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only one way to be sure:

2ykb1av.jpg
 

Buzzfuzz

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Piece of paper, if it sucks the paper towards it or blows it away, you'll know right away.
 

AmiNeo

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I presume you mean without having to plug it in?

In my experience, with most fans you can see the cable on the backside of it and there is sometimes a manufactueres brand label on the frontside. (Front being the side that will blow outwards).

---------- Post added at 09:42 ---------- Previous post was at 09:29 ----------

Trace the cable and see which side its closest to. I'd wager thats the back.
 

Kin Hell

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Fans always have supports to hold the motor to the frame. Rule of thumb is, they draw from the other side & exhaust through the support side. Another way of looking at it is they exhaust on the Sticky label side where the wires enter the motor.

Kin
 

AmiNeo

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Uh what kin said, ignore me lol. I was thinking backwards. :roll:
 

Merlin

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OK, stupid question time........

if you have a fan with no markings on it, how do you know which way it sucks/blows?

ta, JuvUK

Coming from an ex-RAF type, that's gotta be a quote of the day!! :LOL:

Did you ever ask "Which way does the propeller go around?"

Have you tried sticking your tongue in it to find out..?

:rofl3

Seriously, look at the pitch of the vanes from the tips and the direction of rotation as it slows down when the power is turned off.

if the vanes look as if they are going from top left to bottom right like ( \ ), if the fan rotates clockwise when looking at the fan from the front, then the fan will blow from front to back.

^^^^^ Direction Of Air Flow
[ \ \ \ \ \ ] ---> Fan Rotation

(y)
 
Last edited:

Merlin

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Yes, Jurgen, it does, but remember, most fan power plugs are keyed and can only fit on the pins one way around.

To make the fan draw air downwards, just turn it 180 degrees......
 

arnljot

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I think you should connect one lead to your tongue, another to a balloon, and then rub the balloon vigorously against your head and then see if you can make the fan spin.

Next to measure airflow you should constantly lick the side of your face and see if the spit cools.

:jester:
 

Merlin

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I think he should throw some flour at the fan and see if it gets blown back at him. That might work.

Any there any more scientific ways to test this fan to JuvUK's satisfaction....??
 

Buzzfuzz

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thanks, i think that's a safer plan than keropi's tongue idea(y)

Yeah that will hurt already @ 2000rpm and I don't want to know @4000 or 6000 rpm :rofl3
At least my fingers have been in a few fans, and yes their still 8 of them and 2 thumbs with tops and nails.

---------- Post added at 14:02 ---------- Previous post was at 14:02 ----------

I think he should throw some flour at the fan and see if it gets blown back at him. That might work.

Any there any more scientific ways to test this fan to JuvUK's satisfaction....??

Smoke ?
 

Merlin

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How about Juvvie covering himself in tar, then throw some feathers into the air and see if the fan blows them towards or away from him...??
 

Buzzfuzz

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How about Juvvie covering himself in tar, then throw some feathers into the air and see if the fan blows them towards or away from him...??

Buzzfuzz hears a chicken screaming in Juv's backyard :LOL:
 

davideo

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I think we are all enjoying taking the P out of Juvvie for a change :p

Dave G :cool:
 
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