New Static Pressure Fan

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11-06-2007, 02:43 AM
!Xabbu

New Static Pressure Fan

Quote:

Originally Posted by Noctua

"...While the NF-S12 was optimized so as to provide a class-leading airflow to noise ratio in the lower speed ranges and therefore makes for an excellent case fan, the NF-P12 was designed to produce high airflow and an outstanding amount of static pressure, which makes it perfect for use on CPU coolers and other high-impedance applications..."

So they seems they have corrected their problems with the bad static pressure with their last fans. Just hope they can still have the low noice, and unannoying noice signature with the new design as they had with the last design.

If it works the way it promises this could be a new top-performer as radiator fan, if we don't look at the pricetag ;) in price/performance Yate will always rule :D Hey it could probably just be hype as usal, but I'm a loser to hype :rolleyes: But Overclock3d.net has published a review with promising results, just hope they will do a test with a radiator soon, as this one just include a casefan test :shrug: At least the reviewer says this about radiator use:

Quote:

Originally Posted by Overclock3d.net

With the introduction of two extra blades to the fan the static pressure output of the fans will have been increased, which is a welcome improvement over the previous fans. Due to time constraints however, accurate testing of these improvements is not possible. I can say though that when fitted to a radiator consisting of 20 fins per inch it maintained pretty healthy airflow.

So lets hope it's a good performer :up:
11-06-2007, 02:49 AM
k0la

Too bad I don't really like the color scheme. Well, I actually do but it just doesn't fit with anything.
11-06-2007, 03:16 AM
Agent11

I've seen the serrated blades on some high quality industrial fans, it keeps the DB's down.

Not sure how well it would work at lower rpm's.
11-06-2007, 05:30 AM
tiro_uspsss

Quote:

Originally Posted by Agent11

I've seen the serrated blades on some high quality industrial fans, it keeps the DB's down.

Not sure how well it would work at lower rpm's.

serious?? wow, thats really intriguing - wonder how that works? :confused: :shrug:
11-06-2007, 05:40 AM
welshtom

Nice to see a company trying new things :)
11-06-2007, 06:11 AM
Bartflaster

Very interesting .... if they work well with very low noise on Rads they could be onto a winner 54cfm for 19.8db is good if the data is accurate.

If they are around (and not badly priced) when I have the money to get my Rad, I might well give them a go :)
11-06-2007, 06:19 AM
Llwyd

Quote:

Originally Posted by tiro_uspsss

serious?? wow, thats really intriguing - wonder how that works? :confused: :shrug:

The trailing edge of the fan blade has a small vacuum behind it which creates a sort of swirling effect with the air, which creates part of the 'whooshing' noise a fan makes. The notches spread and break up this effect over a bigger area, lowering the pitch of the 'whoosh' and making life easier for the blade behind.

Apologies for the lack of airflow and static pressure testing. Official release was two days after I got the fan so just wanted to get some real world figures done. Might get hold of another two and do a radiator comparison with some other sets of fans in the near future but got a lot on at the moment :(
11-06-2007, 06:23 AM
tiro_uspsss

Quote:

Originally Posted by Llwyd

The trailing edge of the fan blade has a small vacuum behind it which creates a sort of swirling effect with the air, which creates part of the 'whooshing' noise a fan makes. The notches spread and break up this effect over a bigger area, lowering the pitch of the 'whoosh' and making life easier for the blade behind

thanks man! love to learn! :up:

edit: now u got me thinking! wondering if i should get some cheap generic 80 & 120 mm fans & cut notches in them to test it out :D
11-06-2007, 06:30 AM
Llwyd

Quote:

Originally Posted by tiro_uspsss

thanks man! love to learn! :up:

edit: now u got me thinking! wondering if i should get some cheap generic 80 & 120 mm fans & cut notches in them to test it out :D

Well sharkoon use the method employed by golfballs (hence their nickname) whereby the little dimples disrupt the airflow over the surface which reduces drag off the trailing edge / half and slows down the air travelling over the surface. If you fancy getting your physics hat on this sort of explains things, although isn't all that relative to fans lol

The notches on the NF-P12 are different distances from the ends of the blades to increase the range of the pitch of the sound generated. I'm sure if you took your time with a file you could replicate the effect. Would be interesting to see your results.
11-06-2007, 06:53 AM
tiro_uspsss

Quote:

Originally Posted by Llwyd

Well sharkoon use the method employed by golfballs (hence their nickname) whereby the little dimples disrupt the airflow over the surface which reduces drag off the trailing edge / half and slows down the air travelling over the surface. If you fancy getting your physics hat on this sort of explains things, although isn't all that relative to fans lol

The notches on the NF-P12 are different distances from the ends of the blades to increase the range of the pitch of the sound generated. I'm sure if you took your time with a file you could replicate the effect. Would be interesting to see your results.

which sharkoon is that? i've heard/seen before - dont remember seeing any fancy aerodynamic implementations tho... thanks for the btw - will read tomorrow or when i have time - its almost midnight here :D

edit: nvm, found 'em - looks wacky lol - so does it actually work/help?
11-06-2007, 07:01 AM
Locke

Quote:

Originally Posted by Llwyd

The trailing edge of the fan blade has a small vacuum behind it which creates a sort of swirling effect with the air, which creates part of the 'whooshing' noise a fan makes. The notches spread and break up this effect over a bigger area, lowering the pitch of the 'whoosh' and making life easier for the blade behind.

Apologies for the lack of airflow and static pressure testing. Official release was two days after I got the fan so just wanted to get some real world figures done. Might get hold of another two and do a radiator comparison with some other sets of fans in the near future but got a lot on at the moment :(

Owls fly silenty because they have millions of these tiny air distributers in their feathers.
11-06-2007, 07:05 AM
disruptfam

Quote:

Originally Posted by Locke

Owls fly silenty because they have millions of these tiny air distributers in their feathers.

you learn something new everyday :up:
11-06-2007, 10:06 AM
LinusTech

Hardware Canucks will be doing a radiator comparison with these fans, some 38mm scythe fans, and some 9-blade Silverstone fans so we can find out how they compare to A) a similar design, and B) a more traditional "brute force" approach to generating static pressure.

They've asked me which radiator I think they should use, and I honestly didn't have a good answer for them... Maybe I can get some input from the helpful members of this forum? On hand they have the following?

Black Ice Pro II
Black Ice GT Stealth 240
XSPC dual rad
Thermochill PA120.2

Normally I'd say PA120.2 hands down, but that rad works just fine with lower static pressure designs so I lean towards the Black Ice GT Stealth 240. Your thoughts?
11-06-2007, 10:13 AM
[XC] DragonOrta

For testing the best static pressure fans, I would think that Stealth would be the best-suited outof those rads.
11-06-2007, 10:14 AM
Polizei

Wheres Vapor?! New fan to test! :)

When I first read about a serrated edge, I thought it would be the leading edge of the blade.
11-06-2007, 10:16 AM
Sparky

Quote:

Originally Posted by Polizei

Wheres Vapor?! New fan to test! :)

When I first read about a serrated edge, I thought it would be the leading edge of the blade.

Remembering the finger-chopping experience from that delta I gave you? :lol:
11-06-2007, 10:22 AM
Polizei

Shush! That 19k rpm plastic blade of death had my name written on it and you know it.

I forgot which website, but someone had an 80mm Delta labeled "Drastic high speed"... 8000rpm.
11-06-2007, 10:28 AM
Waterlogged

Quote:

Originally Posted by Linus@ncix

Hardware Canucks will be doing a radiator comparison with these fans, some 38mm scythe fans, and some 9-blade Silverstone fans so we can find out how they compare to A) a similar design, and B) a more traditional "brute force" approach to generating static pressure.

They've asked me which radiator I think they should use, and I honestly didn't have a good answer for them... Maybe I can get some input from the helpful members of this forum? On hand they have the following?

Black Ice Pro II
Black Ice GT Stealth 240
XSPC dual rad
Thermochill PA120.2

Normally I'd say PA120.2 hands down, but that rad works just fine with lower static pressure designs so I lean towards the Black Ice GT Stealth 240. Your thoughts?

I'd say, if they have the time, do both ends of the restriction spectrum. The GTS and the PA.
11-06-2007, 10:38 AM
Bartflaster

Well the others are of a similar design (in that the fins are tighter packed than the PA) , so if they can test on a PA and one of the others it would be good :)

From a purely selfish point of view, the PA ;)
11-06-2007, 12:22 PM
LinusTech

From the reviewer's perspective, adding another variable makes the process take much longer. Adding another radiator makes the whole thing take twice as long. I just don't think the PA radiator is as relevant as the GTS, but I'll give the guys over there my $0.02.
11-06-2007, 12:52 PM
kevinbo03

When I read static Fan, I immediately though they were making these:

http://inventgeek.com/Projects/IonCooler2/Overview.aspx
11-06-2007, 01:33 PM
I)ickie

Quote:

Originally Posted by Linus@ncix

From the reviewer's perspective, adding another variable makes the process take much longer. Adding another radiator makes the whole thing take twice as long. I just don't think the PA radiator is as relevant as the GTS, but I'll give the guys over there my $0.02.

I agree.
I'd definately prefer to see some results on the GTS. The PA fins don't offer enough resistance.
11-06-2007, 01:48 PM
karbonkid

Quote:

Originally Posted by Llwyd

a sort of swirling effect with the air

It's called a vortex i think :up:
11-06-2007, 02:04 PM
!Xabbu

Oww I understand why you didn't have time to do a more extensive test Llwyd, stress is a PITA. Hope you get hold of some more fans and get the time to do a new test :)

Definitly looking forward to Hardware Canucks test so we can see some numbers in our application. Hopefully with a PA and a GTS, but if it is one of them I would go for the GTS.

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