Sharkoon Blade Fans (2-pack) Discussions | Drop

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Mar 28, 2014

These are not very good fans. They're ok, but there are much superior fans out there for less money. CFM is low, but most importantly there is no PWM control (lack of which will make them louder), and it is the cheapest type of FD bearing available. The shark fins are cool looking though and are sure to make your puter go faster, just like the blue LEDs do.

Mar 28, 2014

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Fwirl

Mar 28, 2014

alexkaiHonestly blue LEDs would actually make me want these.

Mar 28, 2014

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realMess

Mar 28, 2014

alexkaiCFM isn't everything. If that static pressure spec is even close to being true, these should make good quiet-oriented radiator fans.
But I don't like buying fans, no matter how great they look, without seeing some published tests.

Mar 28, 2014

dorkvader

199

Mar 28, 2014

alexkaiActually, the "shark fins" do serve a purpose aerodynamically. They act as "Fences" will help to prevent the spread of boundary layer separation (down the length) of the airfoil. This will help keep the flow attached further down the length. You get less lift along the fence area, but more than make up for it with a better attached boundary layer
Now, given the shape, I wonder how effective they actually are, but there is a legitimate reason for having them.
I recommend the wikipedia article for more info: https://en.wikipedia.org/wiki/Wing_fence
(Now I know that that Aeredynamics / Hydrodynamics class I took has finally paid off!)
Edit: In theory LEDs can help too, but they are not bright enough for optical lift to have any real effect on performance. They are also often placed incorrectly for this to be the goal anyway, so I agree that their inclusion is mainly aesthetic.

Mar 28, 2014

alexkai

Mar 31, 2014

realMessTrue, thank you for pointing that out. The other issue is that the static pressure spec is almost meaningless without pressure-vs-rpm (vs noise) graph. Lack of PWM limits their use at low rpms.

Mar 31, 2014

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DingusTaargus

Apr 2, 2014

Fwirlthere are 4 slots for LEDs on these. Just buy 4 X 5mm LEDs from frozenCPU or performancePCS or something. Take hot glue and pop them in there. That is really all they do in the factory anyway. You can get them pre-wired and sleeved as well from both retailers.

Apr 2, 2014