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Static pressure vs. airflow fans

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qubit

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#26
I think you need to get an airflow meter, and set up a tube full of water to comprehend what I am saying. What I am saying is the truth, I have no reason to BS you!

All I am stating is that while your analogies may make sense, when you test these fans appropriately, fans with high static pressure ratings tend to keep that mark. Those geared for higher RPM with a low static pressure rating are going to lose both air flow and pressure as you add things in front of it (such as that tube of water).
I never thought for a moment you were BSing me! :toast:

It sounds like what you're talking about is the motor quality that erocker mentioned, below. Yup, a high torque motor will help to keep the fan speed up all right against resistance, without adding more voltage and is another important quality metric. I'd forgotten about it, so shoot me. :laugh:

You're forgetting the motor and how resistance plays a part in its performance.

Example: a weaker motor that spins fast can produce a lot of airflow. Impede the airflow by placing a radiator in front of the the weaker motor will not work very well. A more powerful motor will not be hindered so much by resistance resulting in higher airflow during situations where higher static pressure is needed.
Indeed, as to sneeky above. :)

bearings, bushings, pitch, angle, shape, texture, additional features in a frame such as dimples or step down areas where the air first rubs against the frame, there are literally tons of ways to change the performance of a fan.

All I am getting at is that there are high static pressure fans for a reason, it isn't just a marketing gimmick as Qubit is implying.
I never said there was any marketing gimmick here? :confused: And the dimples etc are the differences I'm talking about when comparing the quality of fans. The better fan will move the air faster at a certain revs than the poorer one and push back harder against air resistance in front of it, maintaining its speed better.
 

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#27
Typically fans that have less blades usually have blades that a larger and at specific angle, and a strong motor. These fans have more static pressure, hense why they are used so much more for pushing air through heatsinks and radiators, and sometimes front hard drive bays. Fans specifically meant for case fans and supplying airflow have a lot more blades. Take a look at the difference between the Corsair AF120 and SP120s. The blades are different, and the SP120s are stronger since they are meant to push air through things.

They don't have a static pressure spec in the spec table for fans for nothing.
 
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qubit

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#28
Typically fans that have less blades usually have blades that a larger and at specific angle, and a strong motor. These fans have more static pressure, hense why they are used so much more for pushing air through heatsinks and radiators, and sometimes front hard drive bays. Fans specifically meant for case fans and supplying airflow have a lot more blades. Take a look at the difference between the Corsair AF120 and SP120s. The blades are different, and the SP120s are stronger since they are meant to push air through things.

They don't have a static pressure spec in the spec table for fans for nothing.
So at the same revs, those fans will move the air faster, hence giving you more pressure. Alternatively, they spin the blades real fast, to get the air speed up, like the noisy Deltas. It's quite simple and that's all I'm saying.

Dunno why people are making such a meal out of this, including you with your inappropriate snidy remark to me before. :rolleyes: You really should apologize for it.
 
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#29
Dunno why people are making such a meal out of this, including you with your inappropriate snidy remark to me before. :rolleyes: You really should apologize for it.
Nevermind.
 
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#30
Static pressure vs. airflow fans

All fans are both. Static and CFM is a measurement

So am I the only one confused by this question
 

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#31
I don't need to apologize for anything. :rolleyes:
 

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#32
I don't need to apologize for anything. :rolleyes:
Yeah, you do. You're not man enough of course, but that still doesn't stop me putting you in your place with a suitably condescending post on you being such a d*ck with that dumb personal attack.
 

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#33
Static pressure vs. airflow fans

All fans are both. Static and CFM is a measurement

So am I the only one confused by this question
Read the OP, he clearly states he is looking at the new Corsair fans, and if you look at the series names they are set in those two groupings;)

So we went from Qubit being mad about smileys and wanting an apology, and then Qubit dives into an infraction-able offense of then calling him names? Qubit, I think you need to relax a bit man. Since I don't edit this section, the infraction is not mine to give, but as I sit here, you now owe him an apology.
 

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#34
I was personally attacked first after trying to help the OP - by several people - and nothing was done about that by the mods. So why should I apologize for standing up to a bully?

Even if my first post had been completely wrong on technical merit (it wasn't, at all) it doesn't give people the right to behave like jerks and then get away with it, does it?
 

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#35
I don't see how emote icons and some sarcasm got you in such a tight bind, but as for now I think you should walk away, and not accuse me now of standing up for a "bully", as I personally don't care if either of you are butthurt unless it breaks the rules, which you did!
 

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#36
Whatever. Not giving a damn is fairly typical of TPU management nowadays.

Read over those posts - you telling me the others didn't break the rules?
 

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#37
WALK AWAY JESUS CHRIST MAN!:slap:
 

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#38
WALK AWAY JESUS CHRIST MAN!:slap:
I have, thanks man. :toast:

EDIT: I was confused once myself about what was meant by pressure and static pressure. Wikipedia soon came to the rescue, explaining how they're the same, here. :) This is the relevant paragraph:

Static pressure in fluid statics

The term static pressure is sometimes used in fluid statics to refer to the pressure of a fluid at a nominated depth in the fluid. In fluid statics the fluid is stationary everywhere and the concepts of dynamic pressure and total pressure are not applicable. Consequently there is little risk of ambiguity in using the term pressure, but some authors[17] choose to use static pressure in some situations.
 
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#39
Yeah, you do. You're not man enough of course, but that still doesn't stop me putting you in your place with a suitably condescending post on you being such a d*ck with that dumb personal attack.
You sound mad bro....Calm down its just the internet.
 

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#40
I have, thanks man. :toast:

EDIT: I was confused once myself about what was meant by pressure and static pressure. Wikipedia soon came to the rescue, explaining how they're the same, here. :) This is the relevant paragraph:
That quote says that pressure = static pressure, that's a no brainer. You initially stated airflow = static pressure, which it does not, so what is the point of the wiki link?
 

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#41
You sound mad bro....Calm down its just the internet.
I don't like you any more. :cry: :laugh: Cheers matey.

EDIT:

That quote says that pressure = static pressure, that's a no brainer. You initially stated airflow = static pressure, which it does not, so what is the point of the wiki link?
Just to clarify those pressure/static pressure terms for anyone wondering about it like I did a while back and add a bit of useful knowledge. Nothing more or less.
 

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#42
Whatever. Not giving a damn is fairly typical of TPU management nowadays.

Read over those posts - you telling me the others didn't break the rules?
Sorry you feel that way, in my experience, people that think this are usually on the receiving end of some flak, from what I have read in these posts, you started with an honest opinion with honest advice, you got some of it factually incorrect, or perhaps just got confused (I did too!) you were challenged on some of it, you then lashed out, got some back and now the community is poorly managed and your left feeling bullied and hurt.... have I got that about right?

You know better than most.... just report what offends you, don't react to it, that way we keep it impersonal and allow those who's job it is to moderate to do just that.... end of speech.

Thread going nowhere now and closed.
 
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