Multiplying AIRFLOW | Fan Showdown S4E7

[@yaroeb9136]

Why don’t you try putting the cheater duct and fan and mounting it to the “air multiplier” of the blade-less… I would love to see a little special episode of that combo. I think your right about the lack of solid airflow being the issue with the lack of air movement through the bladeless main housing

[@Meg_A_Byte]

You'd be better off with regular 2 fans honestly.

[@practicalguy973]

The bladeless needs static pressure as he mentioned in the video. I think it needs a squirrel cage fan.

[@tigheklory]

Yes, attach the cheater to the bladeless. Also when you did the smoke test you were only putting smoke in the on inlet and not the fan inlet.

[@liiich6175]

I was annoyed he mentioned his concerns for the fan yet didn't bother to simply put the large duct part on a tried and tested fan. Also could of trimmed the other fan if it was just scraping. Naturally there will be a follow-up video addressing the complaints like usual lol

[@static2430]

@@practicalguy973 since the cheater was designed for static pressure, it might actually do well.

[@chaindorian]

I assume others might also ask the question, but what would happen if you attached The Cheater to the Dyson Air Multiplier component?

[@Flare-nd]

that would be cool but i think the cheater generated more airflow than pressure and the 80mm fan for the dyson air multiplier thing was probably meant for high pressure instead of airflow

[@Timberwolf69]

@@Flare-nd If the bladeless was designed for high pressure, I would say it has failed. "If I put my hand next to it, I don't feel a lot of airflow, just air moving kinda all over the place..." - Major Hardware That description doesn't really match the job description of air pressure... And, as far as I understand the principle behind these "bladeless" fans, they need to produce quite some air flow to pull the surrounding air along.

[@adamwolfy4826]

Id love to see this!

[@notacat2423]

Cheater would be cool, but even just a standard fan instead would be interesting to see too

[@YouTubestopsharingmyrealname]

This is what I came here to say

[@dgkimpton]

Could you use the original Noctua fan as input to the fanless? Would be interesting to see if there was actually any airflow improvement from the tunnel.

[@NoHope_]

not really, the noctua is 120mm while the bladeless was designed around the 80mm, so the noctua wouldn't really fit inside.

[@dgkimpton]

@@NoHope_ it wouldn't take much to choke it down - just a bit of tube. But, I take your point.

[@robeustice3665]

Or scale up the multiplier?

[@stevecade857]

Please try the Bladeless with just a standard A12x25 on the side to see the results with the standard fan.

[@DigBipper188]

for anyone who wants to make a double-stacked fan, here's a little tip; You need to have the blades counter-rotating to each other, or one set will stall from the turbulence of the other, which negates your static pressure and airflow advantage that you would otherwise get. A lot of server grade cooling fans have a similar setup to this. Take the 40mm fans from a 1U rackmount server, those have two fan modules sandwiched together, and the blades are set to counter-rotate so that the fan blades can counteract the turbulence they would otherwise experience, making the fan not only more efficient than if they were to co-rotate as the blades of the second fan wouldn't stall, but also it effectively doubles the static pressure, which is extremely useful when your fan is designed to pressurize a cavity like in the bladeless' case, or in a highly dense server. Just make note that this modification will also mean that the fan is a lot noisier than a single blade setup though as it will have a notably higher blade-pass frequency. TL:DR, take two A12x25 motors, shove them together label to label, then make two sets of blades that have reversed geometry, and you will have a more efficient double-blade configuration. Add the cheater's ducting and you can probably cheat to one-up the cheater.

[@Wurdo]

What are you waiting for? Submit this design for the next episode!

[@petkras]

You actually see something very similar in high-end vacuum pumps (look up turbomolecular pumps). Stack 10 fans in the same duct with spinning directions alternating, spin them up to 50k rpm, and end up with insanely low pressures.

[@xEzoeth]

I would really like to see the bladeless with either the "standard" Noctua fan, or the cheater

[@MajorHardware]

It was root beer

[@MarkhorSculpin]

@@MajorHardware No, it was ice (with a little root beer filling the gaps). You could have had so much more root beer... I'm disappointed.

[@sandzhs]

This

[@odizzido]

@@MarkhorSculpin Filling in the cracks of ice is the optimal way to have a drink.

[@MrMCDiggles]

@@MajorHardware faygo rootbeer?

[@tabbek]

May be just me, but it'd be nice to have something akin to "classes" for the fan showdown, for example, "stock-like" for styles entirely within the fan frame, an "enhanced" class for those with like a simple air guide on the front (like no moving parts, less than 2x stock frame thickness), and a "open" class for the styles that are more of a whole system rather than just a blade disk. Maybe a "meme" category as well.

[@IndigoWhiskey]

for awarding kudos that would be quite cool, its also handy seeing how each "weight catagory" compares so you can compare results to the effort required to get them.

[@lossless4129]

Here here I put me vote on this one!

[@The_Privateer]

Great intro and being a good sport about the abysmal Asetek video LOL. Love ya man, keep doing what you do!

[@1nv1c7u5m4n30]

Your production value has really increased in the last few episodes. Great all around improvements. insets of meme's or inset text, side bar video with audio overlay(s), adds and immense infotainment value to your audience, Damn good job, sir... I'm sure you've heard it before in your comments but YOU alone are doing an unreal amount to advance cooling technologies for a variety of applications across a host of fields. Thank you ever so much as your work is making the world quite literally a better place in the macro. Keep rolling, Sir.

[@ShowercapStudios]

I love the Microcenter plug, especially how you tout the ability to buy from them online if you aren't lucky enough to live near one, but then end the presentation with an in store only offer. *table flip*

[@EvilCerealBoX]

I was told, in-store, this offer was not currently valid. =(

[@chriss1914]

The "intake" to the bladeless is only a portion of the air getting moved. The main component of the moving air is the fan. The fan is responsible for 50-75% of the air output and the "intake" is the remainder. These are meant to blow not suck. This is not the best test for such a device. they have 2 intakes and 1 exhaust.

[@john_john_john]

Came here for this. I have one and I can confirm that the fan is responsible for, at the very least, like 75% of the total air moved.

[@Pystro]

Video at 11:26. I rest my case. Yes, it would have been interesting to see a second smoke test, but the air flow measurement was done correctly.

[@nexviper]

@@Pystro From a quick look at how "bladeless" fans work there are 3 aspects to how it creates the airflow. The base fan (creating the low pressure area and the boundary airflow), the air behind the ring being pulled in by the low pressure area and air after the ring being pulled in by the boundary turbulence. I've no idea how much of a difference not having that final part makes but it is something the fan in the video was missing from its final airflow by just exiting into a solid tube.

[@chriss1914]

@@Pystro I was talking mainly about the smoke test. Hens the 2nd word of my post....I rest my case, mic drop, eye roll...... you agreed with me but didn't know it, lol

[@CharlesVanNoland]

Seeing the bladeless, I'm going to hazard a guess before seeing how it performs and say that it's not going to fare really any better (if not worse) than just the fan by itself only because the dyson multiplier relies on a high speed little turbine of a fan in its designs. They use a tiny little milled turbine and just whir that sucker to crazy high RPMs (tens of thousands) and that's really what's going on. The air multiplier is more like a torque converter, and if you don't have the torque then you aren't converting much. If the bladeless kicks ass then I stand corrected. I'm hitting play now.

[@LiveType]

Yep, that was my concern. You need some crazy static pressure to make it effective. That noctua fan just doesn't have the power. Would be cool to stick a regular noctua fan to see how much it might improve.

[@EinhanderSn0m4n]

Air multiplier trades velocity for volume. It's like a reduction gear.

[@dustinbrueggemann1875]

Yeah those things have a lot in common with high bypass turbofans, to the point that there's actually a jet engine in development based on it.

[@chas1878]

It's just a impeller

@@LiveType also I think the slot where the air comes out is quite big, but that's a limit of the 3D printing I guess.

[@joeybuddy96]

I was really happy to see he backed off on the Asetek thing! Too many ppl out there who make mistakes just doubling down on poor decisions.

[@lawnmowerdude]

Triple down!

[@seikojin]

I have to say, the angle and placement for your appropriately sized drink and the fireplace on the screen in the background, totally meshed well. Making it look like a fire on your drink. Kudos.

[@toddzircher6168]

I'd like to see the Spider re-submitted with a change in tolerances to compensate for distortion under high RPMs.

[@Mirrormn]

I was actually surprised how well it did considering it was scraping/colliding. If improving the tolerances and getting it to run smoothly improves its airflow by as much as I would assume, it could be a real competitor.

[@btwbrand]

2 minutes with a small blade would be enough to clearance this. The mans head is a waste of brain cells for not doing it already.

[@toddzircher6168]

@@btwbrand I would disagree in that it is not his job to fix designs. (Beyond some printing issues.) The designer needs to be aware of the forces on their fan and design appropriately.

[@Nealio6s]

First up, love the series. It's super interesting and entertaining, and I loved the addition of the wind tunnel. May I suggest a small potential change to the smoke test? In order to prevent the exhaust air from interacting with the yet-to-be-ingested smoke, what if you were to mount the fans to a sheet of plexiglass/acrylic (ex: 2'x2') instead of using the helping hands? Once again, thank you for making the series!

[@chrismichaelyoung]

i like this idea a lot, if nothing else it shows exactly how much air is coming out of the business end of the fan, therefore showing only the actual measured air going into the test chamber

[@Teh-Penguin]

Can I also just stop everyone for a moment and draw attention to how wonderful the thumbnail for this video is. Thank you.

[@beaconofwierd1883]

You should start measuring the efficiency of the fan too :) Your current setup can pretty much do it, all you need to do is to measure the input power to the fan. Then you can get the power the fan provided to the air as: Pi*(diameter of your flow duct)^2/4 * density of air/2 * (air speed)^3 Then if you divide those to you have the efficiency of the fan :) Maybe for the next season? :)

[@greaseball9537]

watched you for so long and it has always evaded me but i somehow just knew you where a veteran as well thank you for your service my man from a navy guy!!

[@lithium534]

You should connect the cheater to the fanless to see what would happen. The fan on the fanless is too small.and has to much mass for high rpm. :(

[@AZREDFERN]

I have that same mug. Did you get it from the shoppette?

[@jonessii]

lmao great intro, didn't think too much about Asetek when you posted the video but yeah, I can see where people are coming from with that. In hindsight, perhaps an ill-advised collab to say the least

[@bathmallow]

Can you combine the cheater and the bladeless to see what that does?

[@CottonballMonster]

I second to this. The cheater has a high flow rate so I would love to see it use the air multiplier. If it will be better or worse Also if I may add, Im curious to see how the bladeless perform without the tunnel just the blade and the housing

[@dakotasander5745]

Dude, that would be sick

[@HasanBabasi]

I'm really happy to see someone tackle the bladeless design, I've suggested it multiple times on the channel and it makes me so happy someone took a shot at it!

[@werdfeefs7027]

It's fascinating that the bladeless ended up being that loud - the recording seems like a completely ignorable noise. Were you able to tell if it was coming from the fan, or just air moving in the tunnels, or...?

[@DavidFrostbite]

The sound curve seemed pretty flat, and mostly in the low end. So even though it's loud, it's not annoying.

[@Timberwolf69]

I would guess it was the tiny, double stacked fan. These short blades don't move fast enough to cause any sort of "sonic boom" at their tips, but the turbulences caused by the design can create a hum.

[@dustinbrueggemann1875]

@@Timberwolf69 Wingtip velocity effects are basically negligible at this scale. All of the noise is just a result of turbulence interactions or physical tolerances.

[@Timberwolf69]

@@dustinbrueggemann1875 Just what I said, just a few less words... 😉

[@dustinbrueggemann1875]

@@Timberwolf69 I misread what you said about the tip speed. /shrug

[@LordCakeskull]

Idea for next season maybe; Design a new fan frame to test with the original blades and motor? Winning design used to test the best fan blade designs from the leader board?

[@ame7165]

that type of fan needs really high rpm's (the Dyson one). they're quiet in the Dysons because they can do a lot of sound deadening on the inside of the fan, but the 3d printed one is a hollow resonating tube haha

[@TGUlricksen]

This is the exact format I want for all things to be tested. Thank you for staying focused on one topic. We need a Fan Guy and you are our Fan Guy. Don't be corrupted by the fan companies money please..Thanks again for producing these videos.

[@StarlitCharlotte]

I was thinking the same about the fanless. I would love to see a redesign of the "motor" fan and see it retested

[@Nurhaal]

The bladeless needs pressure, not velocity. The fan type needed is a Centrifugal Fan for high pressure. I wonder if that'd work in this case, giving you much increased CFM. The duct itself also benefits from polish and smooth surfaces since trying to encourage some laminar flow over the surface would improve the efficiency of the air pulled in via the negative pressure. This is what I love about Fan Showdown. SO many ideas. So many MORE ideas that come from the ideas presented. I love how every one always sees potential improvement.

[@matthewnardin7304]

Always nice to see a crew chief doing well after they get out. Gives me hope for myself.

[@the-regularguy]

the colour on this batch is just so good !! imagine an all white chassi and these colour fans oml!!

[@drew899]

I think the air multiplayer fan would’ve needed a fan with a higher static pressure. Either like a radial fan design or a fan with a lot of low angle of attack blades. I’d be curious to see what its like with a stock noctua fan. I want to see more air multiplier designs!

[@Oblithian]

"I was feeling hot so I took pitcher" "oh you mean a selfie?" "no🍺"

[@Oblithian]

Sometimes the best puns go completely unseen.

[@oddball_the_blue]

As a question - would you ever consider 3D printing then axis mill the rough edges to smooth out the fans?

[@facemonger66]

The bladeless design looks so cool in the smoke test! Also glad to see you're paying attention to the community with regard to the Asetek thing, I'm sure a better project/opportunity will come along.

[@mwestie12]

Love the series. It's awesome seeing all of the innovation.

[@markustausendfreund]

Thanks for testing my fan, I will optimize this futher for 3D printing and keep you informed.

[@Santibag]

Your coffee is burning 😄 Look at those flames on top of the cup 🤣 Suspiciously accurate placement.

[@LordDecapo]

I feel the lack of stator blades for the dual stage fan in the bladeless would be better, would allow more static pressure

[@Vacuon]

I have 0 knowledge of aerodynamics, but I feel like stator blades inbetween the gap of the two layers of blade (and on the second layer a steeper blade angle so more energy is added) would make this a lot more useful. As it is the second layer spins in butter.

[@flamedemonwolf2921]

Was unaware you were in the military thank you for your service good sir

[@kaiying74]

I've came back and rewatched this intro like 10 times and I'm still laughing. Legend.

[@tegneren]

Dammit! Here I had such high hopes for the bladeless😅. I hoped the smaller diameter fan would give more RPMs and thus higher pressure. The Dyson one has a tiny fan with really high RPM after all Well guess I will try re-designin the fan, or at least submit an adapter so it can be used with a standard fan. That way hi don't need to print the entire thing again

[@stabbyronnie]

I can't stop looking at your beverage and ALL THAT ICE! It's getting warm, and it's making me thirsty!

[@CarokleinLP]

I would like to see a comparison between a acetone smoothened fan and a normal printed one! Because i wonder how much the strings and ruff edges are making a difference :0

[@ALifeOfWine]

He did this in season 1 or 2, as well as resin prints. Made no measurable difference iirc.

[@MM-gx7qb]

So, for the spider design, it's actually closer to a stationary turbine design. The way it works is like you described, but the part you're referring to as a stator is actually called either a nozzle or guide vane. Usually working in pairs, the nozzle and blade set will optimize flow to produce the highest rotation with the least amount of energy used (typically compared by power output vs fuel consumption in turbines). I'd recommend checking out the design for the majority of gas turbines used in stationary power gen applications like the GE Frames or the Siemens GTs.

[@konrad7592]

I think your beer is burning.

[@spacejihadist4246]

I live near the equator and have been tinkering with fans. When I saw that Dyson fan, I had to borrow one and compare to a cheap fan with the same diameter. The ordinary fan won my test.

[@spagamoto]

Re: the intro... you're a class act, MH. Thank you.

[@loqkLoqkson]

the geometry of the bladeless is brilliant, you'll probably be getting a lot more bladeless submissions now that it's been solved

[@r4z0r84]

Recently seen a huge 3d printed fan that had this shape and made me want to change the shroud on my machine, the effect is insane.

[@douglaslandin5547]

Dude! My dad was a navigator on KC-135s for part of his career back in the 70s and 80s!

[@SapioiT]

Please retest the fan which was touching the sides, and use sandpaper to trim the sides bit by bit until it stopped being that loud, so we can see if that fixes the problem.

[@liiich6175]

Possibly "modding" someone'm else's design issue he is trying to avoid....I would of spat my drink out when I heard that fan scraping if I was drinking lol

[@MaxDad7]

Before I watch the rest of the video, I wanted to say that I got a good laugh out of the intro. I know your intentions were good, and I'm sure the rest of us knew that as well... Well... Most of us. ;)

[@oulck]

Would love to see a better fan blade on n the multiplier. Also curious if intake of the fan and multiplier were better to be facing the same direction.

[@shawnschiebrel]

hey there, I was at Rickenbacker as well... (in the late 1990's).. communications, I managed the computer network. Nice to see a fellow ANG guy :)

[@SnowingNapalm]

can you stagger the "bladless"'s blades so air hits first set of blades then 2nd set? or even add a 3rd row of blades like fewer bit agressive to start and then less agressive then even less aggressive for more air compaction pushing maximum psi out the flow tube?

[@AnthondeVries]

you put your cup down right in front of the fire on the monitor. fantastic.

[@jasonwoody8041]

would be cool to see how the bladeless performs with a standard 120 fan on it.

[@KKthebeast.Swolestick]

You need to be running the Cheater (at least the number 1 fan, maybe top 3), very last every episode (or whatever the current number one is) as a weighted control. It's the only way to eliminate the noctua motor as a variable, all the wrenching on it replacing fans the strain from running massive units. Keep up the awesome content!

[@Vatharian]

I imagine Nesto, sitting in his comfy chair, swirling wine in a crystal glass, new episode of Fan Showdown reflecting from his monocle, himself muttering "you can't touch the moon, peasants"

[@Captain1nsaneo]

That bladeless is a really cool idea of how to get more airflow out of a fixed fan size.

[@boahneelassmal]

the cfm56 is a very wide spread engine. it is used on a large selection of the B737 fleet (classic and ng), douglas dc8, and a wide variety of airbus planes such as the a320 family (a319,a320, a321 + a318) and the a340. Theoretically they aren't exactly built to be used on large jetliners such as the a340 which is why they do lack power. This is why there's a saying among pilots about the CFM equipped A340: "It's an A330 where they changed the engines for hair dryers."

[@DrummerBoy-ji6hu]

What software would you recommend for making the fans? Something that has air resistance measurements or something like that?

[@djsona5428]

Did you guys know Microcenter sold sold filament? I was so shocked that a STORE sold filament that I nearly went into cardiac arrest, luckily Micro-Center also sells pc parts, AND 3d printers, so I built a pc and 3D printed myself a Cheaterfan so perfect it cooled me down and LITERALLY reset my heartbeat.

[@longgo1234]

you are obsolute beastt, i was thinking to test some design, but you already tested them all :)). thank you

[@GuyonaMoose]

I get so excited when I hear the music kick on

[@alexplosion_ITA]

I would like to get in to 3d printing. Searched around and found 2 3d printers, but i can't decide wich one to buy between them... One is the prusa i3 and the other is the ender 3 v2. Which one would you recommend? (sorry if the comment isn't 100% related to the video but i thought this would be a good place to get some good suggestions)

[@dergerald]

Nice beer glass from König Ludwig Hell. Kaltenberg is right around my hometown. Cool to see that on Fan Showdown

[@MajorHardware]

Got it at the German American festival in Toledo Ohio

[@DelmaterCD]

Could be wrong here, but I have a guess about the blade-less. If it’s supposed to function like the Dyson air multiplier, you may have been putting the smoke in the wrong place. The main air supply comes from intakes that are at the base of the Dyson Air multiplier fan closer to the fan blades. The backside opening of the shroud itself isn’t the main source of air, it supplies additional air. Design tweak that may have been helpful there would be a length of tube just before the fan itself. It would increase the velocity of the incoming air, and possibly more pressure. It probably wouldn’t change your test results that much, but you’d be able to see a whole lot better what their actual output looks like with the smoke test if you point the smoke towards the input of the A12X25.

[@Kualinar]

For the Spider, just add a piece of cardboard under the stator. It'll give it a little bit of additional clearance. It may be just what it need to not rub.

[@KelbaughJAK]

I'd be curious to try the bladeless with a standard fan

[@jamesa8851]

Yeah and then put the best current fan on that.

[@en2oh]

I'm guessing that there are surface effects at work in the blade-less version. Have you considered post print processing?

[@JustynIkeda]

Imo you should have sanded/filed or reprinted the Spider, it obviously wasn't designed to be touching the stator blades and the fans should be shown as close to their intended form as possible!

[@NecrOdium]

@Major Hardware from a fellow KC-135R crew chief, I'm enjoying the videos.

[@sambarna4102]

I 2nd Yaro EB, or just use A12X25 fan through the bladeless. Could u shows us both to see what the do?

[@jdcairncross3631]

Have you tried to print fan submissions in your resin printer and maybe get smoother prints?

[@lost4468yt]

0:08 damn bro that's an old meme by modern standards. Try and keep up with the kids homie!

[@memelorddavid2938]

My thing is I just wanna know what's the absolute best singler fan? Then what's the best...attachments like the Chester, and combine both.

[@Michael_D_show]

For the bladeless. Can you modify the base to take a 120 mm?

[@xxpitchkingxx5372]

Star fox barrel roll was a classic add. Noice.

[@DracoOmnia]

First 20 seconds were best part of this episode, lol. Part of the problem with the Dyson inspired fan is that all things Dyson rely on extremely high rpms, nothing we can do is going to make an a12x25 into a 20k rpm motor.

[@brucebaxter6923]

Am I missing something and the flow/ noise readings are done with an installed radiator?

[@BRUXXUS]

Curious, what slicer are you using? CURA 5.0 should make slicing these way easier and also great quality. I've been super impressed!

[@singular9]

The best way to solve the Bladeless' issue is to straight up copy a high CFM blade design and use that. You could probably just mount the a12x25 straight to the housing and it would perform better (or you could use something like an NF-F12 Industrial or if you wanna spend less, the ML120 or ML120 Pro from corsair (which are very high CFM/$).

[@RobinWilliams002]

I wonder what the airflow would look like with a fan with no centre spinner stator thing. So the blades are attached to the inside of a hub and driven with a belt...if you know what I mean

[@russellzauner]

When the channel finally earns enough, you absolutely have to get with Carbon3D, lease a manufacturing cell, and retest all the designs (if you know about CLIP tech, then you know). It's a lot less than buying a nice SLA printer on your own and produces parts that no other printing tech *or* traditional manufacturing can; yes, previously "impossible to make" designs can be tested. Until then, Igus (not affiliated) makes a filament that is *tribological* meaning things like self lubricating, low coefficient of friction, etc...they make "slippery" tape even lol but I have used their filaments in the past and they don't have the structural strength of a molded part but the tribological properties don't seem to be reduced in the least. This means that when you print parts that will have touching segments, instead of producing heat and melting they'll basically be built of forever slippery plastic bearings. Seems it could be useful somehow.

[@marianojesus5137]

Love this show is like crowd founding engineering, I'm her since season 1

[@LuxGamer16]

Am i the only one that noticed your drink being "on fire"? Cause it looks lit. Also nice video!

[@groenendiek]

I have a FAN question.Are blade shapes and angles optimised for a specific rotation speed? What if one would design a fan that changes the curves of the blades when it spins fast? Would that possibly improve the fan performance? This could be done by advanced 3d printing technique - to combine hard and flexible plastic. I'm not going to design a fan, just putting an idea forward for the FAN fans.

[@IndigoWhiskey]

dude nice curveball for the design ideas there. perhaps try the squirrel cage fan that had great output and pressure but needed direction, and whack the output of that sucker in that multiplier because the cheater setup is great for in flow purposes but i highly suspect the centrifugal action of the squirrel will net more throughput.

[@Tome4kkkk]

Are there any fan blade models I could print and assemble with a hub for a 40 cm household fan?

[@Scorponox93]

Wow. To think that I had the same idea this week and was trying to figure out how to make the model... Lol Though, I have to say that the design of the airfoil section, the bladeless ring that catches the air, has a big flaw in how it tapers inwards at the end. The air "multiplying" happens because the air going through the inside of the ring causes a lol pressure zone at the center and in front of the ring, but in this case the reduction at the end moves the air on the ring inwards, towards that low pressure zone, so it literally increases the pressure there. There's a reason why the dyson fans have a large but thin ring instead of these jet-engine looking units.

[@stewievader4]

Would like to see the spider given another chance with an adjusted model, or simply sanding the tips off a bit. it did pretty well considering it was scraping against the other mounted piece.

[@vash3055]

How well does the bladeless hood work with other fans?

[@jamestaylor3805]

It's a speaker box with a fan where there driver should go, of course it is loud. That one will be about finding the right balance of fan size and rotation for comfortable use.

[@Beanlipe]

I'm interested to see if the bladeless multiplier would perform better if instead of 1 fan intake it would have 3 offset by 120°

[@NiSiSuinegEht]

Micro Center really needs to open a store in central PA. Probably do quite a lot of business in the State College area.

[@ericfeldkamp3788]

Thought of an issue with the bladeless test: With the smoke, you were only measuring how much added air flow there was on top of whatever the fan was pushing through the system. The air entering through the fan was not interacting with the smoke at all, probably removing most of the airflow from that portion of the test. The only way to accurately test this is to measure the output in any way relative to other fans is by measuring the output.

[@Elrog3]

That portion of the test is only for visuals and doesn't factor into the number anyway.

[@curtisjackson355]

Nice drink placement caught my eye thinking your drink was on fire 🔥