The ultimate case "fan"

[Random Nonsense]

hey guys thought i would share my CRAZY idea with u....

a friend of mine has a model jet engine, i am thinking of trying strapping the intake to the top of the case, with the exhaust pointing skywards. this thing will suck through about 10 cubic feet a second or something crazy like that! i could just leave a few BIG holes in the case and get crazy airflow. Slight problem tho. u guys keep on about delta's being noisey, this thing is over 100 decibells!!!

i decided im gonna try it! i'll post pics once i get it going lol! not on a working PC tho, iot would suck all the components out!

[TOMATOMAN]

sounds like a lot of fun :} BTW where did het get it?

[Random Nonsense]

the engine is a home built one, he bought it off another guy i know for £550 so a bit expensive for a case fan! :p it is going into a model plane that both me and my friend are gonna practice flying jets before we go for the world speed record for model planes.....

[Mr.Lansing]

It seems like u'll get deaf soon...

[phiber]

Originally posted by Mr.Clitz
It seems like u'll get deaf soon... really soon

[ManOfKnight]

that is a CRAZY db rating...you should wear EPs if you are going to go ANYWHERE NEAR THAT!!!! although that WOULD be a NICE amount of airflow, almost like a small tornado in your system

[Random Nonsense]

hehehe i wont use it in a proper PC, just a sorta show off taking it to the extreme thing.... and it isnt that loud really..... im being given a MUCH more potent one on loan from a company..... 150 MM diameter, about 600 MM length and puts out 320 LBS thrust at least.... and about 120 - 130 db..... if u ever seen a harrier at an airshow, this thing makes one of those look quiet! reason i need it is because im going for world RC plane speed record :)

[RedDeathDrinker]

Well, Random Nonsense - When it goes out of control and flies up here, I'll return it to ya.........

Jet powered, or ducted fan?

[The Overclocker]

i hope you have a big hevy case, shouldn't you have even air flow in and out of your cpu. A problem could be the fan pushing other fans around casuing them to burn out. Whay don't you build a bong and put it on that might help it abit

[Random Nonsense]

reddeathdrinker: turbine powered, a Microjet-engineering albatross 95 with some SEVERE mods to it.... 320 lbs thrustlooking at mach 1 at least!

the overclocker: its got so much suck on it it will be the only thing on the case! just a load of holes to let air in! no extra fans.... i wont put anything in the case, no way i want PC components going down the intake.... and the case wont move anywhere as the engine will be shoving it downwards.... the engine im thinking of trying it with only produces 18 lbs thrust

[KILLorBE]

Originally posted by Random Nonsense
world speed record for model planes.....

Off topic

I'm still working on my RC car, I am trying to beat the World Record for the fastest electric RC car, right now it's something like 120+KM/H (average speed measured over 100 metre).
Right now I'm at a little over 100 KM/H (Measured with a Kyosho LAPBOY) But I need to 'play' a little more with the gearing and electric motors I have (top notch motor I have is a 30000+rpm TRF motor, TRF=Tamiya Racing Factory, Hard to get and pretty ($100+) expensive)

On topic
BTW:This is what its all about (I wanted and probably still gonna try) A 60.000+!!! CFM fan mod. More info here (http://www.gideontech.com/guides/fanengine/)

MMMmmm wonder what it will do with a TRF motor.

PS:Maybe the TRF is not the most powerful motor I have, I found a 'Property of' Trinity 'Experimental team use only' motor. Well it has to do with torque and RPM, we'll see...........must....beat...WR

[The Overclocker]

it is a nice, wait, that isn't the word...mad idea but it will only get you pc down to abent at best

[r0ckstarbob]

um maybe i'm missing the point but they already make 120mm - 107cfm fans which is twice as powerful. i have three of them in my box (front, top, back, 2 92mm in the side) and they crank.

if it's just cause you want to build a fan yerself, well

rockon crouton

:)

[KILLorBE]

Originally posted by r0ckstarbob
they already make 120mm - 107cfm fans which is twice as powerful

Make that 190CFM (Delta FFB1212EHE) My friend has 3 of them, but if you read my post it says 60.000CFM (sixty thousand, That's a lot more than 107).:D

[Random Nonsense]

well the RC car record will be tricky with that tamiya motor.... if its anything like the ones i used to use.... i have a trinity D 3.5 in my losi street weapon, before ther bearings died it was fast... d3.5 span to 36kRPM unloaded.. i know a guy using a brushless motor in an RC dragster he also going for record, and the brushless will hit 70 KRPM

there is no fan on earth that could equel the CFM of my m8's jet engine :) you would measure the throughput in CFS cubic feet per second!!!! at idle it will suck your fingers in from 3 inches from the intake! its something like 250 grammes of air a second, think how light air is.....

reason im doing it is just to go totally OTT... just gotta show how far you could go with air cooling, no way would i actually put anything valuable in the case with the engine sucking that much air..... but will look funny... might put the pic as my avatar

[Chronical]

Originally posted by r0ckstarbob
they already make 120mm - 107cfm fans which is twice as powerful

10CF/sec * 60sec/1min = 600cf/m

[r0ckstarbob]

Originally posted by KILLorBE


Make that 190CFM (Delta FFB1212EHE) My friend has 3 of them, but if you read my post it says 60.000CFM (sixty thousand, That's a lot more than 107).:D

well, it's common to use a comma instead of a decimal point to seperate your hundreds column from your thousands column.

60.000

60,000


big difference between the two

[KILLorBE]

Originally posted by r0ckstarbob


well, it's common to use a comma instead of a decimal point to seperate your hundreds column from your thousands column.

60.000

60,000


big difference between the two

My bad

[r0ckstarbob]

at any rate... 60,000!!!!!

that could suck small fillipino children or household pets into the intake if you weren't careful!!!

:D :D :D

[KILLorBE]

Originally posted by r0ckstarbob
at any rate... 60,000!!!!!

that could suck small fillipino children or household pets into the intake if you weren't careful!!!

:D :D :D

ROFLMAO

[Random Nonsense]

hehehe its lots of CFM.... the exhaust stream is like a very warm gale when u stand 20 feet behind it....

[hyperbob]

Wouldnt that thing turn your computer into an airplane?:eek:

[Random Nonsense]

not really, as when i do it,m all the thrust will push the case down.... i am thinking of making a radio controlles PC for a laugh....

[nihili]

Ok, maybe I'm just too skeptical, but let's think about this.

Your average three bedroom house runs less than 2000 square feet. So imagine a good size 3 bedroom house with 10 feet ceilings. That would be 20,000 cubic feet. So apparently a fan that will fit inside a computer case, pulling only 32 watts of power and assembled from an 18 volt motor can change the air inside a 3 bedroom house three times a minute. So tell me why the fire department lugs around those huge things for chemical spills. Or you could think of a one story warehouse covering an entire football field. That would be rough 300,000 cubic feet. This little marvel of hobby shop change can change the air in that warehouse every 5 minutes!

As for noise, yes it would be noisy. Let's talk airspeed for a minute. Now we're not told precisely how big the fan is, but from the pictures it's pretty clear that it's less than a foot in diameter. So let's use that as a working basis. Dividing the CFM by the cross section of the fan gives us airspeed in feet per minute. To make life easy, I'll round pi to 3 for a cross section of .75 square feet. That should be close enough to get an idea. So, 60,000 divided by .75 gives us an airspeed of the fan of 80,000 feet per minute. Dividing that by 5280 gives us a speed in miles per minute of 15.1515... . Multiply that by 60 and you get miles per hour = 909.09 . That's well beyond the speed of sound, so in addition to the noise of the fan you would have some sonic boom added in. Noisy indeed!

Now of course we can tell from the description that the fan wasn't 12 inches in diameter. In fact it was probably no more than 6 inches in diameter. That gives us a cross section of less than 0.2 square feet, and an airspeed off the fan of ...
3472.5 miles per hour!!!! That's approaching mach 5, wow. I can see why that would be a touch noisier than a delta. The amazing thing is that standard hardware store ducting reinforced with a bit of duct tape can withstand that sort of turbulence, not to mention the fact that the duct is pointed at a card that somehow managed to stay seated during all this. Calling that a tornado is an understatement. I don't know how fast the wind is at the center of a tornado, but i'll wager it's somewhat less than 3000 miles per hour

Frankly though, as I look at the picture again, I'm sure that's a 4 inch duct he's got, wich would be ummmm airspeed of ummmmm *pushes buttons furiously* about 7500 miles per hour. That's pushing mach 10 pretty hard.

So, we have a fan which can be built from hobby store parts, and ducted with off the shelf hardware that can evacuate a large warehouse in 5 minutes, and generate windspeeds of nearly mach 10, all the while drawing only half the power of a weak light bulb.

What are we paying NASA for?!?

:eek:
;)

nihili

[nihili]

One other thought for what it's worth. The SR-71 blackbird at full throttle manages about 2000 miles per hour. They spent years figuring out how to get it to withstand that speed. So I'm even more impressed with that duct!

nihili

[Random Nonsense]

Nihili it aint 60 000 CFM, its something like 600. and it is NOT a fan! lol intake diameter about 2 inches and at full throttle it spins at 115000 RPM....

again i will state i'm doing this for a laugh i have no intention of using a model jet to cool a PC!!!! the bearings in a model jet last up to 100 hours.... now my PC is on at least that much a week and im not spending £50 a week for new bearings!!! I will post pics of the case with the engine running on top of it :)

[Genis B]

men i think you people are getting way off the track, tell me if i am wrong but the whole point of all these trouble is for overclocking right? if it is, i am more interesting in seeing the result:D (gettin these adiction few weeks ago)
mm.... should i go to ahead and continue... and get send to the mental hospital in a few month time.... or i should just give it a rest........:rolleyes:

[Random Nonsense]

well this is kinda off topic..... but it is in my opinion the absolute ultimate in air cooling :)

mods, if u feel it should be moved to GD go for it :)

hey any other ideas for stupid cooling ?????

[Ice Czar]

Uhhh..even though it could suck a golfball through a garden hose, and cycle all the air in your room through the case at light speed, it will at best only cool the case to ambient. It CANT go lower. And the engine will soon raise the ambient temperature in the room.

[RangerJoe34]

hey, personally i think it hilarious that you are going to do this. and why the hell are you running this on a 486???? get a good computer and do this thatd be neat. make sure you send pics after to do this

[a_yeap]

PICS PICS PICS...

I wanna see some pics...this sounds cool...even though it seems ridiculous...

some results and pics and hard facts

So is it 600 000 or 600 cfm?