This is an awesome fan!!! [Archive]

The Doors

08-21-01, 01:55 PM

Originally posted by fuzzba11
Hmmm...the dimentions look about as big as a 120, tho...6 inches?(takes out ruler) yeah, slightly bigger than a 120mm, about 140? Still, that much airflow is incredible, if anyone actually gets one let me know on the noise level! Maybe we should ask the overclockers staff to test one out :D

Your suggestion seems to be really interesting for a lot of us :D
I'm thinking to a a case with 2 of those fans, or something to the Extreme with 4!!! COOL!!!

Oright

08-21-01, 01:59 PM

I just ordered one......
Ill tell ya'll how loud it is when it gets here.....

The Doors

08-21-01, 02:02 PM

Great man, you're really Cool!

peppy

08-21-01, 02:03 PM

that would be a good idea for the front of my case,yes? my case is a 4Q Full Tower ATX Case 300 psu X2, will it fit?

Oright

08-21-01, 02:09 PM

Looks like it will, but then again, doesnt matter, at this price you cant go wrong :D

Oright

08-21-01, 02:10 PM

Originally posted by AlanSr
http://www.bgmicro.com/product.htm

Check this out 235CFM,
hmmmm.....I wonder if you could funnel it on your HSF???:)

Thanks for the link!

AlanSr

08-21-01, 05:13 PM

I'm gettin 4 of these bad boyz,
1 for the bottom intake,
1 for the top of case blow hole,
1 for my v card,
1 I'm going to try and funnel it right on my HS, I think with that much CFM you should be able to drop below ambient temps.
"I think at least because that much air should be colder than the rest.....kinda like when you stick your hand out the window at 60"

it might blow my lil midtower over:)

I already have 2 80mm fans mounted on the side, bottom intake and top exaust.

Godfodda

08-21-01, 05:45 PM

FYI for those of you interested in the noise level of this fan, it's not so bad..... but then again, I'm sitting beside an open case with a Delta38, and a window A/C unit about 3 feet away. :)

Someone posted about this fan a while back and I just got one in last Friday. It really moves the frickin' air. You already know the width (the size of a case), but it's about 2" thick, too.

Just hooked it up in here. It's maybe 1 foot from my right side. The Delta is about 2.5 feet away. I can still hear the Delta whining. Don't get me wrong, the big boy is still loud. It's just not so whiny. And the closer anything gets to it, the louder it is. I do plan on using it for cooling, but it'll run off a 2nd PSU. It pulls 2.26A.

BTW, keep your fingers away from the intake side. It'll try to suck them in. :D

Magistrate

08-21-01, 06:15 PM

Godfodda, could how's the noise at 5v and 7v respectively?

Silversinksam

08-21-01, 06:33 PM

That Comair/ Rotron fan at 7 volts is extremly Quite, and at 12 volts its not loud at all.

NOW they also make a AC version and that model is ridiculously LOUD, but the DC version is extremly quite for the cfm's it pumps out.

I tested this fan at 6,7.5,10 and 12 volts and I have to tell you this baby is quite, I wish I had a decibal meter as I ran the Delta Black label for comparison and the Black label delta is a noisy *******

The Doors

08-21-01, 06:41 PM

Well, at this point is needed a test made by overclockers.com on this fan.......Experts??......:D

fuzzba11

08-21-01, 07:56 PM

Yeah! Oh moderators! Come to test this!! I want a decible rating!

CrystalMethod

08-21-01, 08:30 PM

Originally posted by AlanSr
I'm gettin 4 of these bad boyz,
1 for the bottom intake,
1 for the top of case blow hole,
1 for my v card,
1 I'm going to try and funnel it right on my HS, I think with that much CFM you should be able to drop below ambient temps.
"I think at least because that much air should be colder than the rest.....kinda like when you stick your hand out the window at 60"

it might blow my lil midtower over:)

I already have 2 80mm fans mounted on the side, bottom intake and top exaust.

:eek: :eek: :eek: :eek:
You just one sick puppy...
but, before you hook 'em all up like that, attach them to the bottom of your case and let us know if you can get the thing to hover in mid air. :D

dheinsdorf

08-21-01, 10:08 PM

Originally posted by CrystalMethod

:eek: :eek: :eek: :eek:
You just one sick puppy...
but, before you hook 'em all up like that, attach them to the bottom of your case and let us know if you can get the thing to hover in mid air. :D

When I worked for Honeywell, we used to put Comair-Rotrons in the top and elsewhere of our huge system cabinets - they were big bux 8 yreas back, so if this is the real swinger for x$ then its set in stone smokin deal. I used to have to diag the tachy lines on Rotrons - caps and such to tune spikes of the line.

I am amazed.

FerrariF50

08-21-01, 10:24 PM

the fan looks good but what can I compare this fan too that moves 235Cfm?

Crazy Jayhawk

08-22-01, 01:12 AM

Originally posted by FerrariF50
the fan looks good but what can I compare this fan too that moves 235Cfm? Maybe that squirrel cage Hoot mounted on the outside of his case in the Good Air Bad Air Good Fans Bad Fans Good Grief article.

FerrariF50

08-22-01, 01:17 AM

lol that thing was huge

Originally posted by Crazy Jayhawk
Maybe that squirrel cage Hoot mounted on the outside of his case in the Good Air Bad Air Good Fans Bad Fans Good Grief article.

eobard

08-22-01, 01:35 AM

Don't forget to reinforce your peripheral cards on the pci bus so they don't snap from the force of air people! ;) 235 holy crap!

AlanSr

08-22-01, 08:42 AM

I also read somewhere "I cant think of it for the life of me" but they had a 6inch X 6inch X2inch fan that pushed out 531 cfm for $25. I wanted one but I thought that with that much air it would break something. I have a floor stand fan in the house and I don't think it pushes that much:)

zoopa_man

08-22-01, 12:33 PM

I think I'll buy some stock in paper weights. Dang, that thing can move some air. But I also bet it sounds like a B-52 I think I'll stay with my 80mm's and rheostats so I can sleep at night.

Silversinksam

08-22-01, 04:52 PM

I offered shadow or any OC.com personal with a decibal meter one of these bad boys for testing. I have several and maybe they will test them out for you fellas.

eobard

08-22-01, 05:59 PM

Anyone know where I can get one in Canada? Preferably in the G.T.A. The only place I could find is electro-sonic, a place that has earned with me a reputation of being almost as compotent as radio craps "experts".

Patchmaster

08-22-01, 06:20 PM

According to the manufacturer's web site, this thing is a bit on the noisy side -- 54.3dBA. And that's with the "Feathered Edge for Lower Noise".

Those of you looking for REALLY massive air flow might want to try their Caravel DC model. 550CFM@1650RPM. This one is actually quieter than the other model, 49.0dBA. The drawbacks are that it's only available in 24 and 48 VDC, and it's got a 10 inch (that's 254 mm for the English unit impaired) diameter. Oh, yeah, it's 3.5 inches thick too.

Here's the web site if you want to browse: Comair Rotron (http://www.comairrotron.com/index.html)

Wiseass

08-22-01, 06:38 PM

hey is there any kind of grill or finger guard for these things?

Silversinksam

08-22-01, 08:43 PM

Originally posted by Wiseass
hey is there any kind of grill or finger guard for these things?

Yes they came with grills

SteenkyBastage

08-22-01, 08:46 PM

Originally posted by Wiseass
hey is there any kind of grill or finger guard for these things?

man, took me forever to type this response with my fingerstubs

j/k, i have no clue if it does or not...

Oright

08-23-01, 08:26 AM

Those are some BIG MOMA FANS!!!
Where would you get the 24-48 volts from without paying a fortune on adapters?

PhatKirby

08-23-01, 12:21 PM

If this fan tries to suck your finger in, doesn't it also then suck in dust? I mean, sure, you can keep a constant current of air through your case, but computer parts have things that can catch dirt. Won't your computer get real dirty on the inside real quick?
Isn't this somewhat of a problem with all cases?

Oright

08-23-01, 02:42 PM

Thats something that we alll have to live with :-(
All you can do is clean the case out every now and then (once a month for me). Ive heard or someone using static pads stuck to the top of his case, so all the dust would stick onto it, but his system didnt last very long :D
Ah well.......

Oright

08-23-01, 02:43 PM

Some poeple use dust guards, but they reduce performance big time.

Patchmaster

08-30-01, 10:04 PM

My shipment from B.G. Micro arrived today, including the $8.95 Comair/Rotron fan. This is a BIG fan. This is a HEAVY fan. The housing is metal. The whole fan has a very substantial feel to it. The blades are plastic, but they are very heavy guage. I accidently stuck my finger in a 60mm fan once and had pieces of fan blade flying all over the place. I have no doubt if I did the same thing with this fan I'd have pieces of finger flying all over the place. Unlike the person earlier in this thread, mine did not come with a fan guard so I'm going to have to be very careful. (Maybe I'll try to fabricate something myself.)

As I said, this fan is big. I don't think there's any way you'd get it inside anything but a full tower case, and even then it's going to be a tight fit. I'm going to have to move the speaker and relocate a few wires to make room for it. (I'm going to mount it in the lower front of the case to pull air in from outside.) I was originally thinking I'd build something to direct the air from this fan up toward the CPUs, but after plugging it in I can see that would be pointless. There will be no corner of the case where the air from this doesn't reach. (I'm seriously thinking about ordering another one of these to ventilate my two-car garage.)

The fan is also pretty noisy. I don't have any Deltas to compare it to, but it's way noisier than all my other fans put together. (That's just sitting on the table. I'm hoping it will be a bit quieter when it's closed inside the case.) Just for grins I tried running it off the 5 volt leads and it did spin, though the output was pretty anemic. I'd guess at 7 volts it would about equal the output from a typical 80mm fan.

I should also mention these fans normally retail for WAY more than B.G. Micro is charging. I saw a place online that wanted $72 for this same fan. The fan I got was manufactured in '96, but it appears to be brand new. If you were thinking about grabbing one of these, I'd say go for it. This is a very reputable brand (I saw a few cases of Comair/Rotron fans at work last week, so we apparently use them in the instruments we build. We don't build cheap stuff.) and, as I said, has a very high quality feel to it.

AmbientFiction

08-30-01, 10:18 PM

Mord-Sith has one of those I think he said it was sweet. Its just a bit too much for a normal OC.

Patchmaster

08-30-01, 11:50 PM

Its just a bit too much for a normal OC. Isn't that consider blasphemy around here? I thought it was like being thin or rich -- you can never get your CPU cold enough and you can never move too much air through the case. Besides, isn't "normal OC" an oxymoron? Kind of like "normal insanity"?

joshiieeii

08-31-01, 01:14 AM

Patchmaster, Could you PLEASE double check the dimensions (website says:6.75"x5.92"x2.00" deep) ?? (in mm or cm, preferably) I am thinking about putting it on my DD Cooling cube and I don't want to have to get it and it not fit. And will it run off a regular 300w PS with all the stuff I already have running below?? I don't want to kill my PSU with this fan, the website said it pulled 2.26 amps!! ouch! ***Disregard*** If this thing is anywhere near 7" wide and almost 6"tall, there is NO way it would fit the DD cube =( oh well, it was a cheap fan anyway.....

nolan_3d

08-31-01, 01:23 AM

http://www.comairrotron.com/dcfans/CaravelDC.htm

550 CFM!!!!!!!!!!

Patchmaster

08-31-01, 02:35 AM

Could you PLEASE double check the dimensions I measure it as 6" x 6-13/16" x 2". The mounting holes are in kind of odd positions -- two dead center top and bottom the long direction and two more along the bottom about 30 degrees either side of the center hole. There are no power leads. Instead there are two prongs that are clearly intended for some kind of connector. They look a bit like a miniature 120V power plug. The prongs are sticking out of a little box mounted along the top curve (it fits completely within the dimensions above). It looks like the box could be easily opened, though I haven't done so. The prongs each have a small hole. Wrap some wire through the holes, drop in a little solder and you'll be good to go.

It does say 2.26 Amps on the label. That comes out to, what, a bit over 27W? You'll have to judge for yourself if your 300W supply will be enough.

I'd say give it a shot. At $9 + shipping ($6.50 for my order, which included a few other things that maybe totaled 2 pounds), you aren't out much if it doesn't work. And you could always ebay the thing.

Pounder2000

08-31-01, 03:36 AM

this is my first post, i've been reading these forums for a while and im looking at water cooling my new rig when i get all the parts. i have a heater core from an old Daihatsu Charade and it fits perfectly in the back of my case above the PSU, it is 6" by 6". My idea is to buy this fan and set up a duct from the case side straight to the radiator and out the back, hopefully cooling the water enough to keep temps nice and low. The prob is:

1. do u guys think this will work?

2. I have a 300W PSU will it sustain everything? especially as im looking at getting a 1.4 tbird, and KG7-Raid, and 2x40Gb IBM Hd's, and a new writer. :)

im wanting a quiet and cool system and i thought this fan would be perfect on the 5v line but what db rating does it get on 5v anyone measured it? does it move enough air at that voltage?

AlanSr

08-31-01, 05:30 AM

here is one of the awesome fans I just mounted yesterday,
I really haven't had a chance to run a game real hard yet but I haven't seen my temps go over 30C very often.....hit 34C with the maintence wizard on:)

AmbientFiction

08-31-01, 05:36 AM

Originally posted by nolan_3d
http://www.comairrotron.com/dcfans/CaravelDC.htm

550 CFM!!!!!!!!!!

Good luck trying to find something to power that. I am going to use that for a project of mine a very hard core OC. I'm going to have to spend at least 200 just to get that fan moving. Lexan side + the AC to DC stepper just to run it is around $200. If you have that kinda cash to blow go ahead but unless you know what your doing that thing will hurt you bad.

AlanSr

08-31-01, 05:38 AM

this fan only pulls 2.26amps, most of your 60mm fans pull between 3 and 4.

joshiieeii

08-31-01, 09:23 AM

this fan only pulls 2.26amps, most of your 60mm fans pull between 3 and 4.
Cool, I thought for some reason they only pulled about 0.13amps, well if it does not put too much of a strain on the PSU, I think I will get one and strap it to my DD cooling cube.

AlanSr

08-31-01, 12:07 PM

here is one of them mounted!!!
I love the way it looks.....manly:)

TechnoFile

08-31-01, 12:36 PM

I'm gonna go ahead an order one... being a home theatre nut, I've got a decible meter sitting on the desk next to me all the time(gotta get the levels balanced JUST right for CS). If it does turn out to be too loud, I'm sure(as several peole have mentioned) that it can be run at 5v and 7v.... I'll try to get the db rating posted for those as well. I've been trying to devise a good testing method(to share with everyone, of course) to measure db from fans/drives, etc. If I hold the meter directly over(inlet side) one of my 25mm fans, it reads 78db...however If I hold it at ear level, It reads 52db, which is much quieter... I'll have to work on it this labor day weekend and try to come up with something.

TechnoFile

08-31-01, 12:37 PM

Originally posted by AlanSr
here is one of them mounted!!!
I love the way it looks.....manly:)

Wow.... does look nice.... maybe get some epoxy putty and sculpt a bubble around it so it 'smooths' into the case. got any temp info on how well it performs?

Patchmaster

08-31-01, 12:54 PM

this fan only pulls 2.26amps, most of your 60mm fans pull between 3 and 4. I think you're confusing watts and amps. At 2.26 amps the Comair/Rotron we've been discussing is going to use a bit over 27 watts. Most 60mm and 80mm fans are closer to 3, 4, maybe 5 watts. That would be less than 0.5 amps at 12V.If it does turn out to be too loud, I'm sure(as several peole have mentioned) that it can be run at 5v and 7v.... I'll try to get the db rating posted for those as well. Mine did turn at 5V, but the output was closer to what you'd expect from a garden variety 60mm or 80mm fan. Definitely not worth going through case modifications for this thing if you're going to run it at 5v. On the plus side, it was perfectly silent at 5V. (At least I couldn't hear it over the noise of the other fans in my system.)Cool, I thought for some reason they only pulled about 0.13amps, well if it does not put too much of a strain on the PSU, I think I will get one and strap it to my DD cooling cube. Take a good look through the catalog at BG Micro. They also have a switching power supply that was designed for an external SCSI enclosure. I don't have the catalog with me right now but I believe it would handle a 7 amp load. That should be able to power three of these Comair/Rotron fans. The power supply was less than $10. I mentioned before I was thinking about getting one of these to ventilate my garage. I think I'm going to order one of these power supplies to go with it. It will end up being a lot cheaper than finding a transformer that will handle that load.

Edit: Oops, I was a bit off about that power supply. It will handle a 4 amp load at 12V, so you'd need a separate power supply for each Comair/Rotron fan. Price on the power supply is $7.50.

Chronical

08-31-01, 04:28 PM

How many rpm is this puppy?

AlanSr

08-31-01, 06:17 PM

Originally posted by Reilly

Wow.... does look nice.... maybe get some epoxy putty and sculpt a bubble around it so it 'smooths' into the case. got any temp info on how well it performs?

well my temp info is Awesome,
I now Idle at 25C
a friend of mine was playin Project IGI for over an hour and when he turned the game off my temp was only at 33C.
I couldn't believe it untill I seen it, and with in 30 sec the temp dropped down to 28C.
I have it blowin in and 4 80mm's blowin out

Patchmaster

08-31-01, 06:50 PM

How many rpm is this puppy? 3500. Full specs are here (http://www.comairrotron.com/dcfans/MajorDC.htm) . It's model JQ12B4.

hyperbob

08-31-01, 07:49 PM

how the hell are you gonna get a grill on that thing?

AlanSr

08-31-01, 07:53 PM

I used aluminum grill mesh from an auto parts store.
works great and looks good to.

stops dust, furniture, and small animals from gettin pulled in:)

joshiieeii

08-31-01, 09:01 PM

ok guys, I am getting a bit confused, OF the the people that have the fan in their hands (ouch!, heh) WERE you able to run it off the PSU (300W I hope) w/o any difficulties :rolleyes: (i.e. only able to run the fan, MB, floppy, CD-rom, and graphics card and nothing else??):confused: Patchmaster mention something about getting a seperate PS just for fan......:confused: Take a good look through the catalog at BG Micro. They also have a switching power supply that was designed for an external SCSI enclosure. I don't have the catalog with me right now but I believe it would handle a 7 amp load. That should be able to power three of these Comair/Rotron fans. The power supply was less than $10. I mentioned before I was thinking about getting one of these to ventilate my garage. I think I'm going to order one of these power supplies to go with it. It will end up being a lot cheaper than finding a transformer that will handle that load. *I get confused easily, bear with me, hehe*:D

AZZKICKER

08-31-01, 09:30 PM

i Been running these fans for 3 years
where you been guys

dimmreaper

08-31-01, 09:36 PM

Originally posted by AZZKICKER
i Been running these fans for 3 years
where you been guys Thats not nearly as long as I have been running my PCs without side panels. Hell, I even ran my 1986 PackardBell 286 (my Dad soldered a faster crystal in it for me) desktop chassis without a lid. I've been wet cooling for a year and a half now, and I still have a distaste for side panels. Twice a month I take my PC out to the garage and blow the dust out with compressed air (I turn the compressor regulator down to 40PSI).

Patchmaster

09-01-01, 02:26 AM

WERE you able to run it off the PSU (300W I hope) w/o any difficulties (i.e. only able to run the fan, MB, floppy, CD-rom, and graphics card and nothing else??) Patchmaster mention something about getting a seperate PS just for fan...... I only had it going for a few minutes last night, but it worked fine with the computer already running (if you don't count me shorting out the leads and blowing the breaker in the power supply). But I've got a 350W PSU, so that may not really help with your question.

I suggested the other power supply as a very cheap alternative to separately power the fan. For less than $30 you could have the fan, the power supply, and a nice box to put the power supply in. That's a steal considering the output of these things.

AlanSr

09-01-01, 04:57 AM

all I have is a generic "amd approved" 300Watt psu and I have no problems, plus you can see by my pix I have alot more fans also.

I still have 3 more on the inside just for my Herc profit 2gts

joshiieeii

09-08-01, 10:22 PM

hiyas guys, Finally got my 235 CFM 12v Fan in the mail today. Just wanted to let everyone know that these fans are big, but they push some air. I have a lil Vornado fan (approx. 12"diameter), it pushes about the same amount of air the Comair/Rotron but the Vornado's cost $40!!

I am really impressed with my fan, althought the manufacter date on the fan was Oct. '96, that was kinda weird. Other than it sounds like a jet taking off (a quiet one mind you..), this fan is worth the $9 I spent.

Oh, and I really reccommend hooking up a Rheostat to it, so you can crank it down a bit at night. I have zip tied it sorta near my DD cooling cube, and have already noticed a 5C temp drop at idle (had 2 'lil 60mm fans).

I am going to try to fashion a duct to go from the diameter of the C&R fan to my DD cube, I noticed alot of air going out through the side (not going through the cube :( ) so hopefully this will solve my problem and get me some more cooling. :D I will keep you posted on any progress I make:p , if any heh.

Silversinksam

09-09-01, 04:34 AM

Originally posted by hyperbob
how the hell are you gonna get a grill on that thing?

I tested both the DC and AC version, Both came with grills from the manufacturer.

The DC model is fairly quiet, The AC is definitly not quiet.

Patchmaster

09-09-01, 04:52 AM

the manufacter date on the fan was Oct. '96, that was kinda weird. Mine was the same way. I think they're "new old stock" BG Micro picked up somewhere. It would be nice if grills were included, but some construction screening from Home Depot should do the trick pretty cheap. Allied Electronics has the grills intended for this fan for about $3 if anyone wants to go that route.
Oh, and I really reccommend hooking up a Rheostat to it Have you found one that will handle the load from this thing? BG Micro has a 7.8 Ohm 150W rheostat that I think should work, but it's a bit on the large side (4" diameter). If I could find something smaller that would work (and not cost twice as much as the fan) I'd go for it.

chaosdriven

09-09-01, 10:52 AM

chaosdriven

09-09-01, 10:57 AM

See the second to the last post on this thread:

http://forums.overclockers.ws/vb/showthread.php?threadid=33931&referrerid=1154

I do have one on order.....:D
BGMicro was sold out when I called :(

WyrmMaster

09-09-01, 11:01 AM

I think im gona have to get me one of those:)

joshiieeii

09-09-01, 11:47 AM

Originally posted by Patchmaster
Have you found one that will handle the load from this thing? BG Micro has a 7.8 Ohm 150W rheostat that I think should work, but it's a bit on the large side (4" diameter). If I could find something smaller that would work (and not cost twice as much as the fan) I'd go for it.

:D *Update* Scratch the Rheostat idea, go here and read about the 7 Volt Trick (http://www.fanbus.com/faq/fanfaq.htm). This is a way better alternative, I am going to the Shack to get my supplies Monday. Will keep you guys posted on progress....

Silversinksam

09-09-01, 01:46 PM

There is a seller on Ebay selling selling these fans and most go for $9.95 He must have hundreds as he has been selling them for over a year on Ebay

Actually I bought one from him a while back and he is such a good vendor he accidently send me a AC model and instead of returning it to him he told me to keep it and he promptly send me a DC unit that included a fan grill. Definitly one of Ebays best vendors.

DO a search at Ebay for-- HUGE Fan Comair Rotron Major Air Movement --

Now the seller has 70 negative feedbacks but keep in mind he has had 13446 positives transactions....Anyway his willingness to make me happy makes him a great guy.

PS if you decide to buy one make sure you remind him to send the grill as he forgot to send one to a friend of mine, but he sent him one for free seperatly/

Patchmaster

09-09-01, 06:36 PM

Scratch the Rheostat idea, go here and read about the 7 Volt Trick. This is a way better alternative It's really not a way better alternative. I hooked the fan up to the 5V lead and it did turn, but output was more like you'd get from a garden variety 80mm fan. I'd guess maybe 30-40cfm. 7V would give you more output, but you'd still probably be under 100cfm. What's the point of mounting this giant fan if you're only getting the output of a 120mm? The rheostat is definitely the way to go, the only problem is finding one big enough to handle the job. Short of that, I think you'd be better off getting a few 25W resistors in small values and trying different ones till you find the right speed.