🔥 Epic Fan Showdown: Shocking Results Revealed! | Best Static Pressure Fans | S06E02

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Prepare to be amazed in Fan Showdown Season 6 Episode 2! Join us for an exhilarating battle as contestants compete to craft the ultimate static pressure fan. What makes this episode truly remarkable? Well, brace yourself for a jaw-dropping twist - the fan I least expected to win not only clinched victory but also surpassed all expectations, leaving its competitors in awe!
In this thrilling installment, Major Hardware puts four top-performing fans to the test, but none could have predicted the outcome. Watch as the underdog rises to the occasion with an unconventional design that defies convention and steals the spotlight!
Experience the thrill of the unexpected, the suspense of the competition, and the triumph of the underestimated in this adrenaline-charged episode. Don't miss out on witnessing history in the making!
Hit play now to immerse yourself in the heart of PC fan competition and discover how one fan's comeback shook the world of Fan Showdown! Like, comment, and subscribe to Major Hardware for more epic showdowns and cutting-edge PC content!
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[@MajorHardware]

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[@administrator4728]

Expected results. Generally the higher angle of attack and longer sweeping blades will have better static pressure. High RPM would play an important role as well, but being limited by the cheap Noctua motor kind of sucks. See any server fan vs generic consumer fan. 5-10K motor RPM testing for next season?

[@THISLOVETHISHATE99]

litterally 2 of those fan were clipping the housing say hello to inaccurate data

[@sebbes333]

9:35 I really like the preview window of the fan here, and especially that the name is included too, makes it easier to know which fan is which, especially when they look similar. Great work! 😎👍

[@krystineh]

Any chance we can get the name and brand of filament used for this episodes fans? Please and thank you!

[@Micharus]

Will say World of Warships is a ton of fun, you don't *need* to spend $$ on it, but the option is there. Pay to win doesn't come into it because even if you have the best, hottest ship, if you don't have the skills.... you aren't gonna win.

[@stutterpunk9573]

never change the smoke test song, its iconic.

[@wardus9415]

That background music is called Before Chill and I think it’s somewhat iconic as well. Glad he keeps it around!

[@bigstreetguns6619]

​@@wardus9415 that's nice and all but what's the smoke test song called?

[@wardus9415]

@@bigstreetguns6619Look Where That Got You - Mattie Maguire

[@stutterpunk9573]

@@bigstreetguns6619 it's called BUDUM BUM BUM badabadaa da dat dat daa daa dadadat dadadat *synth moment*

[@Heythisismychannel]

yes

[@charlesgoin8217]

Just resent my turbopump design for the 3rd time.. and as an HVAC designer I KNOW it will surprise you.

[@RONALDEPAUL]

I wanna see this one @major hardware

[@GrumpiestKitten]

I recommend sending it using gmail. The email can only be 25 mb total in size iirc.

[@lickytime9683]

I want to see this!

[@just.gajche]

@najorhardware....this

[@QQ-Q-QQ]

Thanks for checking out my take on the DiaForce. I flew a bit too close to the sun with the clearances. I wanted to keep them as tight as possible to make the fan less leaky. Judging by the soundsample however it seems to be scraping somewhere. Probably at the little lip that covers the stepped inlet of the A12x25. I think a literal airscrew (conical multi-start with low pitch) that is similarly sealed would perform even better. Time to reach maximum pressure would also be a good tie breaker next to noise performance.

[@altairtodescatto]

Do with bigger and more overlapping blades :)

[@UKfromadrone]

im not good with designing, but what would happen if you would design a two-step jet fan? (like the ones on jet boats and jet skis, but optimising it for air movement like an airplane propeller pitch instead of a water prop pitch?) also yeah, it was defo scraping

[@sparqx]

Please can you share your design on thingiverse or printables 🙏🏻 I am looking for a velocity stack fan for a home project and would love to see how yours performs 🫶🏻

[@QQ-Q-QQ]

@@sparqx/model/782370-fanshowdown-diaforce on printables

[@Dan-Simms]

I figured that the large fan would come in first, those big blades that overlap a bit is what make it so good, less air able to splashback and escape.

[@cavalierliberty6838]

Yeah, I noticed a lot more consistency in the wall of smoke with the inhalation test, I figured once I saw that, she was the victor. Gotta keep that air behind the fan for static pressure.

[@mrab4222]

A taller fan would have a shallower pressure gradient, increasing the pressure more gradually.

[@glenmcgillivray4707]

You have more depth of fan Chord to trap the air in and preventing it leaking. It won't spin fast enough for volumetric nor Cooking performance, but it'll trap air really well. incoming season of the towers of fans! Also puzzled why we didn't have a volumetric measurement taken as well for curiousity sake

[@Grabarz23]

Could you test a market avaliable fans to have a comparison? Also can you test some of industrial fans like noctua for example?

[@anteshell]

@@glenmcgillivray4707 What is volumetric measurement? The amount of air moved in given time? And what is cooking performance?

[@TheObsesedAnimeFreaks]

for static pressure you want a lot of depth and a large fan blade, the more overlap the better. it has to do with pushing air without it going back out, rather then pure air speed.

[@ghomerhust]

those thicc delta fans are a prime example. huge thick blades, powerful motor

[@rayzian]

arctic P12 comes to mind

[@guycxz]

Wouldn't lots of small blades with a high angle of attack be better? Like the fan of a turbofan jet engine, but taller.

[@TheObsesedAnimeFreaks]

@@guycxz no, also very different application. We don't want thrust, we want air pressure. These are very different things. There is a reason why air compressors typically use valves and pistons and not fans. They don't make a lot of air speed but they do make a lot of pressure. It's also why the sp120 from corsair back in the day had massive fans compair to their air speed variant. Another example is Silverstone's air penetrator fans. They actually were the first fans with overlapping blades. They made a lot of controlled static pressure.

[@Nilloc777]

@@TheObsesedAnimeFreaksJet engine compressors do make lots of pressure though! They just also happen to produce thrust

[@BionicBurke]

I figured from the shape and blade overlap the tall boy would come in first. The only issue I'm starting to see with this run of tests is that people are going to design fans that are really good at holding in pressure even if they add to that pressure extremely slow. A slow building pressure based on how well it's trapped in a confined space isn't going to fair well in open atmosphere against a radiator. Maybe at the end of all this put the top 10 against each other in an actual cooling contest.

[@theneonbop]

yeah, sooner or later someone will make an actual 3d printed air compressor IMO its good this way, obviously it no longer represents cooling performance but it shakes the series up in an interesting way and should lead to some more unique designs

[@LeLe-pm2pr]

a screw-like rotor design might indeed perform really well

[@tobymarol7329]

could even be the next season, same test but instead of sealing the tube off put the radiator at the end, so it's about making the best pressure/flow ratio for a rad

[@BionicBurke]

@@tobymarol7329 I was trying to think of a way of doing that but I was on like 1 1/2 hours of sleep over that last 48 hours. This is a great idea.

[@blarghchan]

some ancient knowledge percolating from the depths of my brain says that the Diaforce was a shoe-in for static pressure. You want the blades to overlap, basically more of a screw than a propeller. The closer you get to a fluid pump, the better the static pressure will be.

[@michaelblacktree]

My thoughts exactly.

[@drick50]

I expected it to win as it was the only fan that didn't have gaps between blades. ..when you look straight at it.

[@smokingiscool599]

Using the sound to determine tie breaks is a good idea, and It's always interesting to hear the difference in how the fans sound. Maybe next season can be a competition for which fan makes the best white noise generator 🤔

[@athmaid]

One problem with that is that two fans might hit the same SPL (say 54 dbA) but one could sound significantly more annoying. I think for a PC fan that is way more important than noise level alone

[@smokingiscool599]

@@athmaid An upset in the competition rankings due to a fans dulcet tones would be rad.

[@Its_Onion]

for the smoke test you could have a rad or something on the other side, something that visualizes how it goes through!

[@Its_Onion]

also could have it run something hot to have an effective delta, if it really lowers temps!

[@timothymine1135]

From my understanding of static pressure. The most important things are clearances. want them to be as little as possible so air can not escape. Fan blades will need to overlap as well. Any opening left that air can make its way back out will reduce pressure.

[@johnbeeck2540]

Wow - the designs are really getting sophisticated and mostly more practical than past seasons...

[@bobnewkirk7003]

I think we need to see a return of some old heavy hitters from previous seasons. I want to see how The Cheater measures up to the new rig.

[@AlexSwavely]

I think, more important than sound pressure level, is the tone. Even though the ew project fan was the loudest, it would be the easiest of these to listen to all day because there's no high pitch whine.

[@chuckthetekkie]

Since you are exclusively testing for static pressure, when sound testing you really should be mounting the fan on a radiator as obstructions can change the volume and sound profile.

[@Njazmo]

If you have a fan close to a radiator, it makes turbulence and more noise, if you have a shim between the fan and the radiator, less noise.

[@sienile]

I think we need 2 leader-boards... One for everything as it is, and one that only includes compliant fans (ones that fit entirely inside the frame of the AX).

[@ScibbieGames]

I think a lot of fans that exit the frame of the AX would still fit inside a normal case, so I don't have too much of a problem with that. However, shrouds and such do take away from the idea of designing the perfect _fan_. It's no longer just one part being swapped.

[@sienile]

@@ScibbieGames - Yeah, but if you want to use it as a pull fan you can't. And many of them add twice of more the mass like The Cheater. And like you said, it's about the best fan, not about shrouds. But those can have a place, so listing them separate of those you can use like any other fan would seem appropriate.

[@ABG_3D]

Epic episode as ever. I would really like to see The Cheater in a static pressure test as it was the best from previous seasons 😁

[@NeoIsrafil]

I'm glad you've decided to do testing for static as WELL as CFM. It's an important aspect that we need when using fans for thick heatsinks or water-cooling radiators versus blowing open air.

[@nicm125]

Check out the Dwyer 477AV-00 if you want more resolution. I've used both the 922 and 477A. The fluke is definitely a premium instrument, and the price reflects it. The Dwyer isn't fancy, but I think it'll get you the measurements you need. I've seen them abused in testing labs, come in for cal, and they pass spec no problem. Also seen them blown the heck up, and wayyy out of cal. 922's were a little better. Either way, if you want an extra digit for a few hundred bucks that's my suggestion. Could always build your own slack tube, maybe get a video out of that.

[@wjajr84]

Noise as a tie breaker is great. Another idea time to pressure.

[@nicholaswelna9303]

I think this group is a good demonstration of how the decibel measurement is not an end all be all with respect to "noise". The ultralight was not the "quietest" based on the decibel measurement, but to my ears sounded the quietest and most pleasant. Compare that to the diaforce which was the second "quietest" but to me sounded the loudest. If you had someone blind rank the recordings from quiet to loud, it wouldn't line up with the decibel measurement. I'm not an audio engineer, but I know that this is because the frequency of a sound affects our perception of how loud it is. 2 frequencies can measure the same decibel level, but be perceived at very different "quietness" levels. I think it would be interesting to dive into this in a future season. I also wonder if you would see a difference in the decibel measurements from the fans when they were hooked up to the static pressure measurement setup.

[@sienile]

Quieter in a tie seems pretty good, but I think airflow would be a better solution.

[@pastaalalamborghini]

It would be cool to do CFM, static pressure and sound. The fan that moves the most air at the highest pressure, the quietest wins

[@MrZacfisher0924]

A slight overlap is key for high static fans when looking at it head on if you see past the blades then it won’t have high static because air can escape back through the blades, if you can’t see past the blades then it will “hold” the air in the container better

[@robertmoore119]

That design that won the static pressure test also has the largest blade surface area. The blades leading and trailing edges also overlap very well, a key point for sp designs. That can be done with blade width, I forgot the term, and blade number, though shape has an effect. I was still surprised.

[@michealarburn9861]

So glad you kept all your honest thoughts in the video even when it turned out different then you initially predicted... That's what makes these so genuine and awesome to watch!!

[@kristofferlindvall9285]

Crazy this has been going on 3 years.... and I have watched it from the first episode. I guess I like fans.

[@LanGista02]

I'd say, that the DiaForce was the quietest, the spikes of some vibrations increased the DB reading but the pitch was low enough to make it the most pleasant and less disturbing for ear.

[@daemn42]

Because this season is about static pressure, It might be interesting to do a modified smoke test where the outlet side is a sealed plexi box.

[@chrismichaelyoung]

I just commented this, would be interesting to see how exactly the fan holds back the pressure, then it would be easier to tell which designs are doing better.

[@mjolnir3309]

This will make for a very interesting season. Good job picking a change up to keep thing fresh!

[@enderoftime2530]

The shroud on the diaforce is almost certainly doing a lot of heavy lifting here. More specifically, it’s the fact that it is a diverging nozzle which increases the output pressure in exchange for a reduction in air velocity.

[@WouterVerbruggen]

In general the more "blade" there is in the way of the air the larger the static pressure. So typically fans with wide and/or overlapping blades provide more pressure, when normalising for other parameters like rotation speed and such.

[@boskan89]

Larger blades have larger scoop area, thus further the air travels down the blade, more air from the front of blade will be scooped. This "piling up" of air at the end of a blade is what makes bigger static presure.

[@tysonredfern5054]

I love these series of videos. Seeing your constant push to better understanding of how to rate all the cool fans is inspiring. I have a suggestion on the way you're testing. Considering that you have the ability to control the voltage/ speed of the fans, have you thought about getting a base line air flow from the Noctua fan, and then setting all other fan entries so they match the Noctua air flow, and then measure the static pressure delivered? You could even go so far as setting the air flow, then measuring RPM, voltage, and static pressure, and setting a points scale 1-10. More RPM = less points, higher voltage = less points, more static pressure = less points. This is a base efficiency test for any fan. In the HVAC industry, we want our fans to run with as little power, as slow as possible, with as little static pressure as possible, for the best efficiency. There is more to it, but I think a fully data driven test would create a cool bar to set.

[@chrismichaelyoung]

Idea for the smoke test; Mount a box to the output side of the fan with a glass panel on the side so we can see inside it. Would show in the smoke how well the fan retains the pressure it's putting into the system. Since we're changing the way performance is tested, the smoke test should change, too.

[@zoson]

Thicker with deeper fan blade is going to be the name of the game when it comes to pressure. That's why the 30mm fans like the T30 do so well.

[@adamwolfy4826]

For static pressure, in simple terms, the more "stuff" you can get in the way of the pressure trying to leak back past the fan (blades, housing etc.) without it negatively affecting the fans ability to push (more like scoop with compressor fans) air into the system, the more static pressure it can hold

[@furioustester4056]

Look at the smooe test, notice how every single fan except the generic 7 had a spinning motion behind the exhaust, having the print lines parralel to the direction of movement seems to have caused the air to be dragged by the blades less, and more pushed outwards, i think his concept actually worked really well

[@sirmrmcjack2167]

The funnel shape of the giant fan probably contributes to the high pressure. The spinning fan centrifugally throws the air outwards which can leak in the wrong direction, my theory is that the funnel shape prevents this, more or less forcing the air to only go in one direction.

[@SeabornNomad]

i love how scientific you make box fans, in entertaining ways. i've learned so much watching this series. can't forget the good timed meme humor though :)

[@Fk8td]

A fan that has less gap between blades and larger surface area will likely have a higher static pressure. Blade overlap helps in a low speed fan like this. I said that last episode. An axial compressor requires a lot of speed. Higher speed needs less overlap because the speed prevents air surging back through.

[@TechModProjects]

If you look at the arctic p12 which has large scooping blades and performs very well for static pressure, I wasn't that surprised to see the design from QQQ win. Love these showdowns, keep em up!

[@acenith25]

To be honest, the EW, the sound of it, I could live with easily. The profile of sound was smooth.

[@BlueThunder1965]

Enjoying this take on fan show down keep up the great work!

[@Hold3n916]

11:54 my understanding is a single stage axial compressor has a lower compression ratio than a centrifugal compressor, possibly explaining why that chungus did better. While it’s not a true centrifugal compressor, it does have some key characteristics that lead to a higher ratio than a single stage axial. Call me crazy though 🤷

[@Timberwolf69]

Well, there is a reason why jet engines have quite a few axial compressors in a row...

[@pastaalalamborghini]

You crazy bastard, Max

[@Timberwolf69]

@@pastaalalamborghini ?🤔

[@pastaalalamborghini]

@@Timberwolf69 read the last sentence of the original post and OPs user name

[@Timberwolf69]

@@pastaalalamborghini Uh... Okay. Sleep deprived brain needed the help. Cheers.

[@ZoeyR86]

I think it be best to have a test setup with an intake or exit and adjustable opening. Let just enough air out to hit 25cfm and measure the pressure it can achieve while pushing a fixed flow. High static pressure without flow is kinda pointless

[@littlegandhi1199]

Excellent idea!!

[@ZoeyR86]

Also zero flow puts the blades in a stall state

[@shadofps234]

I think the tir breaker should be air flow, if the fan has a higher pressure and air flow that means it is a batter performing.

[@Paxmax]

That basically means you need to obtain an entire characterzation of entire span from 0 CFM to minimum restriction needed to measure. Quite the undertaking 🤔

[@vitor900000]

0:14 As Trunp said, wrong. For static pressure you want big/large blades that are overlapping.

[@daemn42]

My thinking is.. With a normal fan design most of the work is done by the tips of the blades and backpressure (not exactly return flow but area of lower static pressure which becomes the maximum possible for the whole volume) occurs around the root of the blades. I think the DiaForce works well because it accelerates the air through a narrower intake and then throws it out radially. The backpressure may be pushing back at the root of the blades but then it encounters the higher velocity flow at the center. My suspicion is that if you reprinted the top plate of that 3 piece unit and gave it a similar narrow intake you'd raise it's ability to generate static pressure. Notice that in a real radial compressor, the blades don't extend toward the slow moving center at all. The hub takes up most of the radius (blocking back pressure) and the blades are tiny, allowing the whole blade to have nearly the same velocity. I don't have the means to submit a design, but here's how I'd do it. Make the center 3/4 diameter of the disc solid and have the blades only filling the outer 1/4 diameter. But the "solid" area doesn't have to be wasted. Put vertical curved fins on it like those on a centrifugal compressor, and then add a closed in top section with a relatively small intake, and close tolerances between it and the fins/blades below it. It doesn't need to be high flow, but it needs to create high velocity flow radially against which the backpressure has no alternate path to the intake. Of course the edge tolerances need to be very close as well.

[@Rippthrough]

Not too surprised, any static pressure test is going to give a massive advantage to the fan with the deepest profile. The trick is to go as far as you can without getting bearing vibration...

[@mikehensley78]

kinda makes sense...looks like those blades are taking a long, overlaping scoops of air(the tall one/winner). SCIENCE!!! Hell yeah.

[@MichaelEllisYT]

The Diaforce is the only centripetal fan that didn't fling air out the sides on the smoke test. You could tell it was a good design right there.

[@user-uv4sn5dq5i]

could you test for both push and pull configuration as some fan designs might work better either push or pull configuration for different cases

[@lambda7652]

A static pressure optimized fan for only static pressure would be Pumpe. maybe someone can print a Diaphragm or a plunger that just gets pressed down.

[@GreatStar6]

Working at a computer store i noticed that fans built for static pressure had huge angles of attack for the blades. The fan that came in first had really good angle of attack! Very nice.

[@shaleemmalik7396]

Not surprised by the result. I knew with certainty which one was the best for static pressure.

[@Yezpahr]

I did expect that coned fan to win. Just like a rocket exhaust it has a choke point where it will trade in pressure to gain speed, but since the tunnel is preventing expansion of the air it will maintain the pressure **unlike** in a rocket exhaust.

[@FireBean8504]

Man you can HEAR that wind noise! Impressive!

[@elucker]

Just coming back to the series I'm excited for the new take!

[@TimNelstonIII]

I honestly think the vertical mounting changes the entire game. Even weight distribution plus removing the limit of how tall a fan can be could REALLY switch up what people submit if you used the face-up mounting for all the tests.

[@J_tega]

I really want to make some fans but im so trash at making any 3d models so i just watch and been enjoying from the sidelines for the last 3 years. Love the channel keep up the great work

[@woodstockm4328]

I expected the Diaforce to win out of those. As it is a cross between axial and centrifugal designs. centrifugal has a higher standing pressure. hence they are used in duct work where higher pressures are needed... Now I guess I have given the game away ..... Tis great to see these tests you do. It generates some great ideas, without everyone having to reinvent the wheel from scratch. Great stuff!

[@robertheinrich2994]

as an idea for testing, how about this: take some standard cooler block (aluminium, copper, whatever) and a heater element, that gets something like 12V 10A. and have it heat the cooler block (with in this case 120W). then, based on your budget, have either a thermometer probe on the heater element or watch the block through a thermal camera (or both) and measure how good they are at keeping the temperature low. you can still measure airflow etc, but the goal is to have a low temperature, which is the usecase of a fan.

[@BlackRedDead1943]

It's all about active surface area - and that nozzle helps too ;-)

[@SuperJJAlexander]

Could you also include the airflow in the table? It would be interesting, at least to me, to see how much airflow is being sacrificed to get this kind of static pressure.

[@promess]

I think the expansion beyond the throat into the blades creates a high pressure at the inlet that is hard to overcome. The blades going up into the bell probably aided some.

[@btgbullseye]

You should see where the Arctic P series of fans land in the lineups as well. They're really inexpensive, so it shouldn't be a major expense to add them to the test.

[@chubbyadler3276]

Looking at the Diaforce, I would have figured that would have been a more static pressure oriented design because not only does the shroud contain the air that goes out the ends of the blades, as there is no gap there, as well as catching the air via friction, as it is also spinning, but more importantly, it looks like there is no gap between those thick, meaty blades, so that as the air spills out from under one blade, unless it can rotate faster than the fan is spinning, it will encounter the next blade, effectively creating a solid and inpenitrable dam. The only way for air to get out of that trap is to go onward.

[@Nealio6s]

As an additional data-point, you could track wattage and calculate efficiency (ex: CFM/w, mm of h20 per watt, etc.).

[@MsLoneWolf4]

I like the tie break idea, as for this season specifically I think the smoke test should have a radiator behind to see smoke pattern as being push thru resistance. That's my take.

[@vinny142]

11:48 I expected it. Pressure requires not giving the air a way out and that is what that fan does; the entire surface is blocked by blades. Other fans try to just pump lots of air in using smaller blades, which leaves lots of empty space between the blades (and between the blades and the mount) but hardly do anything to keep the air in so it just flows around the blades and right back out. Basically: you can build a lot more pressure by just putting your finger in the neck of a bottle than you can by blowing into it from a distance. This should be visible if you modify the smoke-test to restrict airflow behind the screen. Oh, and the smoke-tests are epic, never ever change them (except for this experiment). In fact: smoke-test-supercut! 24 hrs of non-stop smoke tests, I'm sure you have enough footage for that.

[@shorelineleather955]

The larger fan blades has a larger surface area to push back against the air so once pressure builds it has the ability to push the air in more. That's the way I envision it at least

[@MikkoRantalainen]

Superb work! I think future is DIA Force design with some tweak that allows making it a lot shorter without giving up the performance.

[@someweeb3650]

Saw the diaforce fan in second place in episode 4 and came to check it out, was not surprised it looked like that.

[@17473039]

Bell mouthing the intake on a car engine intake shows typically a 6% increase in airflow, so if you use this to reduce the fan intake side diameter by 6% and retain the existing exhaust side fan diameter, the increase in cross sectional area through the fan should present as a reduction in air velocity with a corresponding pressure increase. Also, the reason high static pressure fans have swept blades is to account for the centrifugal forces applied to air molecules that cause them to fling outward. With generous tip clearances, at low air velocities this can cause the air to bleed from the pressure side of the blade to the suction side, losing you volumetric flow and pressure. A 6% reduction in intake cross section can be capitalised on to cover the tips of the fan blades to greatly reduce this happening.

[@HurricaneRainbowOG]

100000% expected it to perform that well

[@ILike2Tinker]

My understanding regarding axial compressors, was that it was trying to get pressure between stages to improve combustion in jet engines. Not necessarily add pressure at the end. So I would figure that an axial compressor with a stater would do a reasonable job at preventing some back flow, but ultimately would interfere with the fan creating pressure in the air column. I could be totally wrong.

[@Tletna]

I wasn't surprised that the big boy did well. I'm just surprised the other ones didn't do better.

[@krisrobitzsch]

Man the quality of the prints have really gotten impressive since S 01. I can’t even see layer lines on those fans.

[@DFPercush]

I had faith in the Diaforce. I think fans that use centrifugal pressure are going to have an advantage this season. I think the ultimate winner is going to be some kind of squirrel cage design.

[@Unleashed75]

I was thinking that the DiaForce made more sense to come 1st out of the group. Less room for back pressure. The weight was all closer to the middle, so it could still spin fast. Deep blades to keep the air moving and again, less back pressure.

[@LightningJR]

yes i expected the large one to be best. it basically a wider fan, if you get a wide fan like 35mm instead of 25mm they will do better, more fan blade area to move air

[@lemon265]

Gotta love the compressor style fans! In two days theres gonna be my exam includung pumps and compressors, somehow i'll make sure to mention fan blade shapes xD

[@o0Dan0o]

I'd love to see a printer and material fan showdown. Take one of the best fans in the latest season, but one that's trickier to print, and compare how the prints of that design from different printers or prints using different materials perform. If love to see if and how much these impact performance.

[@blakegrigg3573]

The NF-A12x25 is a fan that has a good balance between airflow and static pressure, but a fan with higher static pressure would be the NF-F12. Static pressure is the main design of this fan.

[@ThermalLeft]

10:38 This method of measuring static pressure is quite accurate than I expected. Only a resolution of the sensor is the problem..! NF-A12X25's SP on spec: 2.34mmH2O, NF-A12X25's SP on the test: 2.4mmH2O

[@cynic5581]

High static fans share one thing in common. There is no gap between the blades for pressure to leak back out through. If you look straight on at the fan you shouldn’t be able to see through it.

[@landonferguson7282]

I think that for creating pressure, a high blade angle might be beneficial.

[@HenrikMyrhaug]

I'd say it obviously makes sense from a physics point of view. With fluid flow, power = flow rate * pressure, so with a constant power output, an increase in pressure must necessarily correspond to a decrease in airflow and vice versa. So airflow- optimized fans must necessarily be bad at generating static pressure, and static pressure optimized fans must necessarily be bad at creating airflow. My best guess is that a good pressure- optimized fan is any fan which limits the crossectional area available for air to flow by widening the central hub, with blades that just barely overlap so that you can not see through the fan from the front. Limiting the crossectional area for air to flow limits the area of high pressure air under the blades, allowing the fan to generate higher pressure with less resistance on the motor. Overlapping blades means no air "leaks through" by going out the area of the fan where there is no blade.

[@Maccaroney]

So excited for more fan showdown :D

[@yannikvondrehle1363]

I think, the smoke test should also change in this season. Since you measure the static pressure, it would be helpful to see all the turbulences and resistance, introduced by a radiator for example.

[@TheCrossx6]

I think that because the diaforce is so tall, it's harder for the air to escape the tunnel, so it's easier for it to maintain a higher presure inside

[@gigaherz_]

For static pressure the fan needs to fight against the pressure differential so it makes sense that deeper blades help. But since the rotating body is a lot of weight for then to drag, it probably would be best if it was two separate parts

[@DUKE_of_RAMBLE]

My uneducated analysis is that the bigger the fan blade whilst being encapsulated, the higher the static pressure, as all the air it's gathering is getting funneled into the chamber (out the back of the fan). Some unknowns for me is: - Will the blade pitch make a huge impact? Or for that matter, will having a steeper trailing-edge pitch help out? - Moar blades = Moar pressure? _(my gut thinks so; see turbine engines)_

[@DracoOmnia]

Can't wait to have what looks like individual throttle body intake venturis poking out the top of my pc rig 😂

[@RazzRG]

The delta. There is more fin volume . So it's going to be able to grab and push more air. And have less bleed out leak.

[@laharl2k]

the turbo compressor looking "fan" did the best in the static pressure test, who would have guessed!.... XD

[@AlchemicalLee]

Nice! The video being 12:34 is satisfying.

[@rich1051414]

Overlapping blades so that a straight line cannot make it through is what a fan optimized for compression looks like.