The fact that this stuff is so accessible with 3D printing and all the great CFD software available is what makes this stuff so fun! Engineering that was normally reserved for huge companies with million dollar budgets and specialized hardware can now be trialed by anyone that has hobbyist hardware and the know how required to operate it. Backyard engineering!
Why don’t you call this “Fan Fan Testing”? Because... we’re testing fan designs... from fans of the channel But in all honesty this channel is gonna blow up in a matter of weeks
Who hates on you tube? Oh yeah,. OUR GOVERNMENT.. GOOGLE GAVE US FRIGGIN VR WHEN IT WAS STILL A DREAM. MADE US ALL MOVIE STARS. RU-vid rocks,, Google is like a Digital Non Corporeal Entity!
Id like to design a fan blade, send you the file, and also print one on my resin printer and mail it to you to see if there is a difference between resin printed and fdm printed. I have a feeling the resin fan might be better balanced and therefore spin at a slightly higher rpm
Yeah and if I remember correctly resin is alot smoother so it would have lss air resistance, so it would probably be more fair to compare it againtst the noctua fans
2:01 video starts your not missing anything by skipping right to 9:02 (he explains everything again when testing fans) 9:02 first fan 10:32 second fan 11:05 third fan 12:17 summary and leadership
Thanks. I have noticed that he talks too much causing his videos to be about 25% to 50% longer than necessary. I prefer a rapid flow of information with less fluff.
Since the temps are so close I say you should smooth the edges and do a test. This is all about airflow, and my theory is airflow is effected by the ripples on the blades from the 3d printing process. I'd like to see the results. Great video, subbed.
Yeah the poor quality and really rough texture on the fans is going to affect a number of designs. Like the turbojet based one was really rough in areas so it's not going to perform well
Really think noise normalizing gave so much sense to do! You can always make the motors faster if the fan is very silent, even noctua have fast speed fans.
that's so awesome, i didn't think you would actually try my design. i just peeled the bottom side of each blade off where they over hang the hub since they are only a layer or two thick there anyway. -Carl
You should change colours every time. Then you can see at a glance roughly which episode each fan that remains on the leaderboard actually came from. Would make it easier to spot a design that's retained it's position for a long time vs one that's new...
Exactly, the glory of RU-vid where 60,000 likeminded nerds can watch someone testing pieces of hardware that most civillians wouldnt even think about in their life.
I was so surprised by how different each of the fans sound. Which I guess make sense because the wings are different so the generated wave pattern would be different. But this the first time I've noticed something like that. Weird discoveries are a great part of this channel. Thank you for running all these experiments.
@@Tom-nx6ev I thought about it but I don't want his content in my sub box. I'm not interested enough to add him to my watch list, I occasionally drop by to watch a video if it peaks my interest. I'm a filthy casual, but it doesn't quite hold up to others like LTT. LTT is annoying on the ads but spits out videos often and have variety to them, while this channel has a "series" type of videos.
@@jocerv43 Of course, LTT has 11.5M subscribers and is an actual professional for-profit corporation (business), a significant budget, and a number of employees; not just a RU-vid startup.
A comma isn't enough. You need to actually break those sentences apart, otherwise you run into ambiguity because the subject suddenly could be either him or the fans. "Printed by me, who is the best." "Printed by me. Who is the best?" Also the use of "who" adds confusion. "Printed by me. Who is the best?" "Printed by me. Which is the best? Even if it's missing punctuation, the use of "which" might help remove some ambiguity, since it's plural: there are multiple fans, but only one of him. Dunno. My 2¢ worth, 'cause I read it the same way, and I like grammar and punctuation.
The comma would only make it sound more self centered and condescending, due to the pause created by it ("By me, who's is the best"). It's supposed to be a completely different sentence in this case.
The "simple" fan did really well. Considering at how low of room temperature the stock A12-X25 was tested and considering the inperfection of the 3D print, ~1C to be the point of being a decent competitor
Right, simple fan with its imperfect surface was tested at the highest room temperature and still manage to get close to the stock fan tested at the lowest room temperature.
@@baikia777 With only 0.9°C difference in deltaT to the stock fan, that 3d printed fan with it's atrocious surface roughness is better than the stock fans in my PC
If there's one benefit to the whole covid craziness, it's finding all these wonderful YT creators and interesting/creative content. Thanks for the curiosity fulfilling video, and giving me something else to learn!! Peace
It would be interesting to see another fan showdown series but for blower fans. I know it isn't really pc related there's isn't alot of info on how to make them
The "rocket-ship" fan would actually work better as a blower than it did as a normal fan. I agree though, I would rather see something more... generally applicable? Just checking the temperature of his graphics card is a rather uninteresting goal, but at least serves as a relative metric for the viewer designs. If he had an anemometer and jury rigged water column he could do some real tests. It would actually be more fun to watch, I think. Smoke tests, blowing things around, etc. Also checking how much current the motor is drawing, because some designs would probably stall the motor I bet. Hell, he could even use a 3-pin PC fan (if it has a relatively free spinning bearing) as the anemometer, since the third pin is actually just a tachometer.
Simple fan literally won because it's mimicking a thicker fan setup 😂. It's all about optimized angles and usage of available space. Maybe there should be some thickness restrictions?
Yeah, it would need retest next time after a bit of sandpaper or trim, it might be 1st place just because it's oversized. I got 34mm thick ARCTIC F12 Pro fan as my rear exhaust, been running like 10 years 24/7 and I got room there for 140mm too, but it almost does the job of a 140mm with added bonus of sucking hot air on top of VRM.
Wow, interesting Series! I like it! Borks Fan looked very cool in my Eye but i also liked the Turbine Fan! And as everyone can see, theres a reason Cooling Fans are designed the Way they are. The Design just works.
Need to get one of those programs that uses AI and genetic algorithms to 'evolve' a fan design for the specific purposes. See if they're all they're supposed to be.
This is a lot of fun! Really cool to see what people have come up with. Also, thanks for not picking just memes each time, since I would expect the more 'normal' designs to perform the best, for obvious reasons.
Great series! In fact, I think that using a different color of PLA for each episode is ideal because when we have several different fans on the wall, we can know which episode is each instantly.
That turbofan design looks like something a lot of people would get into, especially considering that fans are often prominently displayed on modern cases. It performs decently, and visually it just pops.
Nice video! What about using one specific filament color for each episode? Like that you can kind of see which week the fans on the leaderboard entered the contest. Maybe put a little legend next to the board?
I have been really enjoying this competition, sounds like you put in a ton of effort in these videos and I commemorate that. Thank you for these I'll be waiting for the next one! Keep 'em coming!
Who said it cannot exceed the hub. It absolutely can - just not downwards cause it hits the base like here. There is no limit in going past the default dimensions - it would probably result in the fan being off-balance and louder but people can do it.
I'd be that the "turbofan" model can be tweaked to outperform anything simpler, it's just a matter of iteration. The reason being, that fan design is heavily optimized when used on turbofan engines, so, at the speeds we're dealing with a 1:1 copy is less than idea, but, you can likely leverage the engineering of the faster one to build the slower version.
@@danydo20023 Motor is already at full power and the fans just spin at whatever speed based on their drag. If you increase motor power to make that design spin at 2500 rpm then the fans that were faster will still be faster.
@@danydo20023 I'd guess step one should be to reduce the blade count, and probably increase the pitch of the blades at the root of the turbine. That'd help it move more air and be less in its own way. I'd bet at lower speeds it's having to push the air away from the next blade more than it should.
Hey! As the designer of that fan, I agree with you. I tried a few things to mitigate that (lower blade count, most notably), but it was interesting to see how a scale replica stacked up against other people's designs as well as the stock A12X25.
They do however help keep the flow more laminar until the very trailing edge of the fan, it sticks to the fan blade surface and lets the fan impart more energy to the air. It’s a balancing act against the drag you mentioned.
Yes, but no Noctua and Enermax made a different support for the fan so it would make the flow more direct against these vortexes. Also some fans are inside a ring which eliminates outside edges thus reducing vortices.
Air Breadwhich oh cool. I’ll admit I only know enough about it to know what the intent was, not how effective it actually has the potential to be. I just know efficiency is a balancing act and I think it’s worth exploring options.
One thing you should test, because I tested it when designing a computer case. I found: 1. It is better to pull air through a resistance than to try to push it through. Probably since it is easier to pull air laminar through a resistance than it is to push now-turbulent air through a resistance. 2. When pulling air through a resistance, it was even more effective if there was about a 0.5"-1" buffer zone between the fan and the resistance. Sealed of course. That was something I wanted to test because of the PC Power and Cooling Silencer PSU I was using which employed this to quiet the fan. I imagine the buffer zone allows the flow to be more determined by static pressure and less by the actual turbulent flow near the blades. So I used closed-cell foam to attach fans to the wooden case to isolate vibration. I never actually got it built, but based on my testing it should have worked fairly well.
Man, these are the types of videos big youtubers can't make. I love the interaction with the fanbase :D. I don't know how to design but I would try the fans with a "scoop" or a spoon shape in the end of the blade, what's closest to the mounting bracket, and also a slight reverse scoop at the top of the fan as well.
Imana slap the big green button on this guy's activity. Pull up his info on the big screen now. This is now categorized Priority One. We need NASA, Langley, DOD, the damn City Council, even the Ruskies in on this. We need engineers, coders, visualizers, aerodynamics, aeroanautics, thermodynamics, everyone we can get a hold of. i mean, we need more! Moooorrreee!!!
This is a very interesting series of videos. I am honestly blown away by how close the simple fan got to the Noctua fan in terms of performance. Wonder whether it would've made any difference if it was a single piece plastic part instead of a 3D printed one.
"it's quieter" why dont you... idk, measure the decibels with your microphone? This way it's not "to my untrained ear", I get this is just for fun I'm just being nit picky.
I really like what you are doing here. It’s entertaining. I can’t trust any of your results though. You aren’t accounting for enough of the variables; ambient temperature, ambient humidity, and especially the smoothness of the material.
When I first found this channel I thought boring. Now I'm addicted. What I would like to see is one of these rough as guts fans printed out smooth or smoothed after printing. I've convinced myself that surface smoothness could make all sorts of differences. Be well m8. :)
I was really rooting for the Inside Outside fan! Looks awesome. And in case you didn't know about this yet, Cura's support interface setting makes removing support super easy and super clean. I recommend checking it out if you have a chance.
lvl 11 hyped for the fans! really cool to see the inventive ideas!! I seriously think there is a small chance the hive mind comes up with some breakthrough!
The simple fan winning didn't surprise me all that much, number 2 did though. Number 2 is designed differently but was almost as effective as number 1. And I hope you could include decibel readings for the fan including ambient room readings for future videos. Normalized readings isn't required except to make sure all fans are being compared equally.
I still think you should characterize the airspeed and static pressure. I know you’re mostly looking for cooling performance, as that’s mostly what computer fans are for, but with the many designs you likely already have or will get, it might be really interesting to see how the fans do at just moving air and/or “pushing” air. While one design might not be good at cooling, it might still be good at moving air. I’m just looking for something to characterize fan behavior beyond its ability to keep a radiator cool. Nothing fancy. Something simple as using your smoke/fog machine might be fine for the airflow. For airspeed, maybe a 3D printed set of small flat blades on a wire as an anemometer? (Or buy one? ~$15-$30) For pressure, maybe a 3D printed box with one side open for the fan and way to sufficiently seal against the fan, then a small hose barb on the box for some small open ended U-shaped tubing with water in it? (A liquid column manometer, apparently.) Not really looking for precision, just characterization. Airflow and Pressure are both specs you can find when buying computer fans. Characterizing them might help compare fan designs. If not, then just keep having fun with it, and thanks for the videos. :)
