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this is the VF 390 a 390 mm fan that is

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by far the scariest thing we have ever

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attached to a computer it is made entirely out of carbon fiber it spins at

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a whopping 10,000 RPM blowing wind out

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the back at 450 km an hour and guzzles a

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potentially lethal 250

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Amps do you remember our last highest

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airfow PC the one that literally blew the top off our computer case those two

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fans combined were 2 horsepower the VF

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390 is

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60 I don't know how long I'm going to be alive so before I go I'd like to tell

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you about our sponsor go to resolve the Legends are true simple easy to use yet

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00:00:54,359 --> 00:01:00,280
effective It software does exist Humanity saved go to resolves remote

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monitoring and management capabil is allow agents to protect and secure

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important it assets checko go to resolve at the link below go to their link here

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come with me this is our problem see that Transformer back there even if we

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took the entire power allocation of this

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industrial unit and powered the fan with it it wouldn't be enough to do it

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legally and even if it could What Mortal

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power outlet and cord could carry that kind of current for context a standard

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nor North American Outlet will do just south of 2,000 Watts our torac can pull

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up to 4.8 th000 Watts out of the outlet

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behind it this fan calls for nearly 10

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times that 45,000 Watts which left us

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with only a couple of potential options for powering it option number the first

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was to build a Frankenstein battery out of 18650 cells we've actually done that

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on this channel before but Frank neither Kyle nor Alex trusted me

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building a come on with a lithium battery with the

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240 cells okay that would have been a pretty

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bad idea a second option for powering the fan was to buy the battery from a

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Chevy Volt it's a little on the high side at 360 volt but because of how GM

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manufactured it having the voltage to something that would be usable for our

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fan is actually relatively simple the problem with that solution is that for

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one a volt battery is darn expensive and

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for two once we fiddled with the pack charging it could be difficult and or

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dangerous given the short timeline for this video then we decided to go the

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simplest route and spend

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$2500 on high current LiPO batteries but

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we won't be using them all at once instead we're going to be doing this

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this is flamable isn't it oh good we've wired up six of our battery packs Each

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of which is four cells in series making

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a total of 24s that gets us up to the

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voltage that we need and given that these are high performance 130c packs

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theoretically they could handle up to what 700 amps but we need about 250

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meaning this should be perfect as long as we don't want to run it very long you

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see we haven't run any packs in parallel which means that Full Tilt we're going

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to be looking at about 6 minutes of runtime even if we account for our

48
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Reserve packs here that gives us 12 minutes of runtime meaning we better get

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this right on the first try before we just connected it to the battery though

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Alex and Kyle over here needed to make sure that it worked the plan so we

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hopefully don't blow up something if something's not working correctly is to

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use this power supply and a boost converter so that we can have 48 volts

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coming out of this into our fan and we'll have current limits right on here

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so that if something's incorrect nothing

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goes super bad this is the ESC for any

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00:04:03,879 --> 00:04:12,920
of you that don't know what an ESC is it takes DC generally from a battery and

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converts it to three-phase AC which is plugged into an induction motor of some

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kind so if this right here gets to about 80 85° or so we're going to have to cut

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the fan turn her down a bit so notice that it's a capon taped

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for isolation it's uh about capacitors all

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the actual business end is underneath here that's where all the fets will be

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uh that do all the switching to get your three-phase out um and then there's your

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control your logic board one thing we have to be careful of with this is the

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inrush current so you don't want to just connect all of your batteries to this at

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once because these will briefly act as a ShortCircuit ah yes but they thought of

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that may I introduce you to Mr spark lead so inside here this lead is a

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resistor when there's a resistance between this lead and the that lead if

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you attach these two points together it will slowly charge the capacitors

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instead of charging them really quickly so all that we're doing now is plugging

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it in plugging it in making sure nothing explodes you plug the hot side

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in okay

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Co then you plug this

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in no spark you plug that in okay now we

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smell for Magic Smoke the easy way to test now if it's actually getting power

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is to probe the pwm lead or you can probe this lead here BS yeah is power oh

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there is a pwm signal oh yes you can see it ha yeah this is a very good

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explanation of what pulse width modulation is you have a period which is

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the frequency at which this is switching and I think this is 50 HZ which is what

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comes out of a standard RC and what you're changing is the amount of time

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that the signal is on right so if this

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is when it's off and that's when it's on so right now I have the channel which is

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this little potentiometer set all the way to zero so fan is no no no going

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right now I am going to slowly rotate

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this potentiometer and you will see how that line reacts to it that small

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distance between there and there is the

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difference between that fan not moving

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and then blowing the computer away we're going to bolt this Frame to the buing

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table so we don't send both of them into the

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stratosphere oh hello hello

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sir oh goodness yeah

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like that's 10%

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power I think I'm might need almost need new underwear from LT store.com it works

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we didn't blow anything up that actually went way better than I thought it did so

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Alex I know lonus is going to want it

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but every fiber of my bean does not want to hand him the remote yeah that will be

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dangerous oh no I want to do the throttle no not no I want to do the

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throttle what we have tested before is running this off of a single boost

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converter and it worked well enough and that was great cuz we wanted the current

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limits and stuff in case something tried to blow up yeah now I've put two of them

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in parallel so we can hopefully get about 60 amps out of it something like

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that sick so we can play with this for a bit and not drain our batteries oh okay

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but maybe these will explode we'll see okay so can you power it on okay and I

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should be holding this down right outut is the output on uh yes they're coming

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from the big boy so I'm connecting the heart okay hand me the spark Le yep

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whoa it makes a sound when you power it on it'll make six sounds just give me a

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sec just give it a second I know you like to send it but okay I I will be

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gentle I'll be gentle so it's not the trigger it's not the trigger it's the

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pot over there just because the trigger's too way too sensitive so

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you're going to turn that pot and it's going to automatically just kick on at 40% the amount of concern I'm seeing

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from you one who is normally kind of Reckless actually really makes me worry

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about because you have the remote oh there you go

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now oh a little bit more it it doesn't

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sound quite right there we go there you go oo that's much better wow it's

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actually surprisingly quiet we're drawing 8 amps at what voltage at 48

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volts at 48 volts so that's four that's

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wait this is 2% power yep what the hell

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is going on here gentlemen wait how many amps can we do at 100 volts we can do up

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to 250 amps at 100 volts what yeah what

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this is this is not that much this is

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unbelievable what the actual heck is

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going on here okay so hold on how many watts is this uh 24 * 12 amp so like so

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this is 250 Watts this thing will do 45

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,000 wats what's the difference between this and a jet turbine uh do you do you

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know how much thrust this has no 60 kg

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so if you had a person that weighed 60 kg they could ride it yeah dear God in

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heaven do you understand do you understand what's going to happen to the

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computer that we put here all right okay let's get the duct

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tape this is carbon fiber reinforced pet G which I'm pretty sure is going to be

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fine workers comp wants to know your

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do not try this at home actually though

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like seriously I'm not too worried about people trying this at home this is an

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8,000 yeah yeah so let me get this straight this is the adapter from the

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arshole of the fan as Kyle calls it how do we to the computer yeah how how is

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this supposed to work just just just relax trust me basically the concern is

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that with that amount of air flow going through here not only can we not have

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any fans in its way because they're going to over Spin and blow out the

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headers on the motherboard it may actually like lift things away from each

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other like to put it in context

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450 km an hour that's what double the

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speed of a category 5 hurricane yes yes yeah there's going to be a double

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hurricane inside this computer where's the H you're duct taping the Shroud to

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the fan du better idea that's not going to do Jack you guys this is a duct it's

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called duct tape the force of the computer pushing against it with the

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cross brace is going to hold it in place does the cross brace come

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up cuz it's just going to blow it off that's what the tie downs are for it's

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going to tie it down we have thought about this where's the

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hammer we've settled on a core I9 11900

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K and this is an RTX

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270 I sincerely hope they survive don't worry it's not

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00:11:30,399 --> 00:11:35,920
good catch new guy dang that was very

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00:11:34,160 --> 00:11:40,839
close to shattering earlier than we expected I really think that we should

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00:11:37,800 --> 00:11:41,880
french rally car all of the glass panels

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I don't know what the freak that means does that mean they normally tape up their headlights so if they shatter the

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glass doesn't go everywhere you know people often walk up to me and say oh

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it's so cool to meet you I'm your biggest fan now that will never be true

156
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ever again because this is my biggest fan

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um I forget how these

158
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work seems pretty stable

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right easy okay cool um hit me

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with okay she's on okay she's on okay

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let's do it torture test yeah torture test small fft there we go there we go

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okay okay GPU okay CPU temps are immediately 100 we need to do something

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here we ready yep

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we go okay so we're still at 100° though oh

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98 our main issue then is basically just

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that we don't really have fans directly on our heat sink the biggest problem is

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you have too much back pressure into the fan it's not liking it oh really yeah we

168
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don't have enough throughput need more power yeah I think

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we need more power so I turn it off now

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yeah that was 2% power right okay I'm

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just about to hand you the remote for the full perc power nice we're going to

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put a current clamp on here you cannot go over 100 because 100 amps is all that

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we can measure wait are we not going to talk about the fact that that door is

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open uh and that garage door is open

175
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because we are going to be generating enough air flow through this room that

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that's a legitimate concerned we bent the doors when we had the doors closed

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yeah we had the we blew out there we blew the air out of that door and these

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ones right here went and we like oh let's not do that y okay we ready okay

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that's 5 amps 5 amps yeah and we can do

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20x this

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yes okay that's 7 amps we're already

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down not thermal throttling anymore let's try to get to 10

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00:14:00,600 --> 00:14:08,320
wow she's real touchy okay we're at 96°

184
00:14:04,759 --> 00:14:12,000
temps are going down you guys want to go

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to 20 ABS

186
00:14:16,160 --> 00:14:24,399
sure wo it's cooling that's for sure okay 30

187
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amps wow

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she goes boys

189
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40 50 wa look at the cables

190
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go

191
00:14:52,160 --> 00:14:59,199
70 how are temp

192
00:14:55,199 --> 00:14:59,199
Alex ADM

193
00:15:02,839 --> 00:15:14,600
our CBL have lifted off W this is unreal at the

194
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100x

195
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how cut it cut it how hot are the batteries they're

196
00:15:20,360 --> 00:15:29,720
fine 40 43 it was drawing 300 W an air cooler

197
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and it was only hitting 94°

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okay round two without the

199
00:15:32,800 --> 00:15:44,360
computer okay woo and legistics was so concerned about

200
00:15:39,399 --> 00:15:46,480
the CPU so can I pitch a crazy idea yes

201
00:15:44,360 --> 00:15:52,360
can we put the battery pack here in the flow of the air in the path of the airf

202
00:15:48,959 --> 00:15:54,199
flow rather 100 amps then that was like

203
00:15:52,360 --> 00:15:59,310
a third power bit above that not about that what

204
00:15:57,480 --> 00:16:02,420
the hell

205
00:16:03,839 --> 00:16:12,800
okay what are we at that's 10 amps and without the comp

206
00:16:08,639 --> 00:16:14,880
wow without the computer in the way she

207
00:16:12,800 --> 00:16:21,639
goes wa this kind of shows you how fans can

208
00:16:18,279 --> 00:16:24,079
be optimized for either airf flow or

209
00:16:21,639 --> 00:16:30,800
static pressure this is clearly all about that airf flow no treble okay now

210
00:16:27,680 --> 00:16:35,519
here's something I want to know

211
00:16:30,800 --> 00:16:37,920
oh you guys lying I can feel it 100%

212
00:16:35,519 --> 00:16:43,399
coming through here can you see my hair moving hold on I'm going to give it a

213
00:16:39,880 --> 00:16:45,360
little more this is at the back

214
00:16:43,399 --> 00:16:49,880
door W

215
00:16:46,880 --> 00:16:49,880
okay

216
00:16:53,720 --> 00:16:58,360
on that's only 60m

217
00:17:01,399 --> 00:17:09,160
wow I have never seen anything like it

218
00:17:06,360 --> 00:17:14,919
how high did we get 60 yeah that's a fifth of full power okay we going again

219
00:17:12,760 --> 00:17:19,919
you guys want to go full boore I've been informed that when we're

220
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running at full boore I am not allowed to stand behind it something something

221
00:17:22,079 --> 00:17:27,839
keyman claw something liability anyway

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the point is I'm going to put this wig on my mop head here and see if I can

223
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even hold it in place I mean that's basically Linus

224
00:17:39,320 --> 00:17:51,489
right 10 o 20 30 that's a 100

225
00:18:10,760 --> 00:18:13,760
what

226
00:18:16,799 --> 00:18:20,120
wow all

227
00:18:23,360 --> 00:18:31,360
doorway W wo it's all smoking get

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00:18:27,559 --> 00:18:33,919
out like take the whole thing you can't

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00:18:31,360 --> 00:18:40,159
um smell through the camera but I assure you it smells a lot don't do what we do

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yeah please don't if you guys enjoyed this video you might enjoy the one where

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00:18:41,840 --> 00:18:48,559
Alex and I used a different fan to cool a computer and it blew the top off or

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you might enjoy the one where Colin and I tried to uh make a battery out of

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18650 cells that one also involved fire and that door and disposing of batteries