And you thought the 172mm Comair Rotron was huge...

[Crazy Jayhawk]

A friend of mine showed me this. Told me that the smallest fan in his case is 92mm.

http://www.comairrotron.com/dcfans/CaravelDC.htm

Check this out. :D

[Daovonnaex]

Originally posted by Crazy Jayhawk
A friend of mine showed me this. Told me that the smallest fan in his case is 92mm.

http://www.comairrotron.com/dcfans/CaravelDC.htm

Check this out. :D
That would be me who told him.

[Christoph]

You could have either a 10" window or 24V fan!

HOLY SMOKES!!! That thing costs US$90!!! There goes the cool mod of the year.

[Daovonnaex]

Originally posted by IdeaMagnate
You could have either a 10" window or 24V fan!

HOLY SMOKES!!! That thing costs US$90!!! There goes the cool mod of the year. I considered a stained glass window instead...but I chose function over form.

[Diggrr]

OMG, who needs a window. That fan while spinning would be a window. Just don't get your finger in it....or your cat. Maybe some 10 gage copper wire to solder up your own fan guard.

Thanks for the link, I'll be filing that away for future use.

[Daovonnaex]

Originally posted by Diggrr
OMG, who needs a window. That fan while spinning would be a window. Just don't get your finger in it....or your cat. Maybe some 10 gage copper wire to solder up your own fan guard.

Thanks for the link, I'll be filing that away for future use. I used 1.5 x 1.5cm aluminum welding wire for guards for my 254mm fan and my 172mm fans. You can find this at any hardware store.

[UserName]

So where would you find 24V at 1.2Amps????

[Crazy Jayhawk]

A bit of window screen could take care of the grill problem quickly and cheaply...

[Crazy Jayhawk]

Originally posted by UserName
So where would you find 24V at 1.2Amps???? Dao here tells me that he's made some PSU's himself out of rectifiers, transformers, and the like.

You could use one of those.

[Daovonnaex]

Originally posted by UserName
So where would you find 24V at 1.2Amps???? You can manufacture your own if you have experience with electrical assembly, or you could modify the fan itself to run on 12v.

[UserName]

I thinks Pic's of this setup are required. Don't you gentlemen?

[Daovonnaex]

Originally posted by UserName
I thinks Pic's of this setup are required. Don't you gentlemen? I think I need to earn the rest of the money to buy the $3k scanner I plan to. Don't you?

[GoldenTiger]

The pressure per square inch would be too small to be effective. I have a VERY high-speed room fan, and while it blows a few hundred CFM's, it's nowhere near as concentrated as my strong, small computer fans :(.

[Aesik]

Thanks, but I prefer to keep my fingers and toes where they were when I was born.

[Diggrr]

It's $50 (ouch) but very nice. 24volts 1.8 amp
http://www.peaktopeakpower.com/catalogs/meanwell/s-40.html

[ButcherUK]

Originally posted by GoldenTiger
The pressure per square inch would be too small to be effective. I have a VERY high-speed room fan, and while it blows a few hundred CFM's, it's nowhere near as concentrated as my strong, small computer fans :(.

Backpressure handling on my 172mm is FAR superior to any comp fan I have seen, they are much better at pressure handling than comp fans (which suck at it).

[ButcherUK]

Originally posted by Daovonnaex
I used 2.5 x 2.5cm aluminum welding wire for guards for my 254mm fan and my 172mm fans. You can find this at any hardware store.

2.5x2.5cm? um is that a typo do you mean mm? 2.5cm is 1 inch, that'd be DAMN thick wire.

[Christoph]

Originally posted by Diggrr
It's $50 (ouch) but very nice. 24volts 1.8 amp
http://www.peaktopeakpower.com/catalogs/meanwell/s-40.html

Great! So far we're up to US$140 for a totally insane case fan.
I forgot whether you're supposed to avoid positive air pressure or negative air pressure when placing fans. (I keep my case open 24/7. It's just like a big free clear window that you can put your hand through.)

[Daovonnaex]

Originally posted by ButcherUK


2.5x2.5cm? um is that a typo do you mean mm? 2.5cm is 1 inch, that'd be DAMN thick wire. the wire itself isn't that thick--in welding wire, that distance refers to the size of squares. Furthermore, I meant to write 1.5 x 1.5cm...damn typos.

[UserName]

That would fit right in a 12" bong.

LOOK AT THE PRESSURE ON THE THING

[ButcherUK]

Actually the pressure on that is a lot lower than on the 172mm fans. They can handle up to 0.8 in.h2o (for the 300cfm) or 0.75 in.h2o (for the 235cfm) vs 0.3 in.h2o for the 254mm. In comparison a 120mm fan can handle up to about 0.25-0.3 in.h2o for the thicker, high speed versions.

[Diggrr]

Off subject, but curious....
Wouldn't pressure be a function of the number of fan blades passing in a given time span? A smaller fan has 7 blades usually, and that monster has 3.
Another question, wouldn't pressure be almost irrelivent if there were sufficient ventilation to let the air out? With enough venting to release the amount of air going in, there wouldn't be any opportunity to build (much) pressure, so it would be based mostly on cfm. For example if the top of the case were replaced with a grating material (expanded steel...etc..)

Just a thought.

[ButcherUK]

Pressure is a function of area of blade (so more is often better) and also angle of attack (which tends to be greater in a thicker fan). As for pressure, there is pressure for pumping round corners and such. Unless you can make an air permeable motherboard or something then it's going to be hard to reduce pressure that much ;)

[Diggrr]

Oh I know the air friction from turning corners, component air drag etc. An aerodynamic motherboard...that's a laugh..:D

Pressure would be most advantagous with air filtering I think. The higher pressured fan would deliver more actual cfm.

Anyway, the debate aside, that really is one killer fan...too bad it's 24 volts. That would certainly be visually striking as far as modding goes. Maybe a nice industrial theme, a couple of rivets, a paint treatment etc...
It would also help get rid of the multiple fans that most use.

[Christoph]

If I see one of those for US$30 (maybe even US$40) I'm getting it in a second. I'm sure that you could toss in an old AT PS to get those 24V, and you could use a PWM (http://bit-tech.net/article/51/) fan controller to go for the ultimate nerd theme. I think I'm a nerd anyway, since I know what a PWM circuit is, but aren't we all?)