Shroud Math

Guderian · Jul 23, 2004

I've been trying to come up with a shroud layout for any size radiator without using angles, due to my lack of tools.

The core measures X * A

The fan mount area measures X1 * A1.

H is the height of the shroud.

Y is the length of the folded edge for the X length.

B is the length of the folded edge for the A length.

W is the length of the X side angle joint.

D is the length of the A side angle joint.

My problem lies in the final equations being equal (W = D) no matter what you put in for measurements.

I know this cannot be true unless X1*A1 is an integral percentage smaller than X*A.

In my situation, my Delta X is = 1/2in. and my Delta A is 1+1/4in.

So where is my error.......

Guderian · Jul 23, 2004

Ok. I'm retarded.

In my defense, I was drawing this out while working radar final control, so my brain was preoccupied.

W and D have to be equal in order to get a perfect joint.

Y and B are the important values for alignment.

So this "should" work for any setup. I will try it out with some cardboard in the near future and report back.

You will need to leave a little extra space for bends, expecially if youre making it out of metal. Add tabs on each side to slide down over the core.

If anyone sees something out of wack lemme know and I'll fix it.

Raider84 · Jul 23, 2004

so what is the equation? How can I determine the perfect shroud for my core!?

z0n3 · Jul 23, 2004

Wow and only this morning Im being yelled at that Ill need math skills in my life.( yes im already back to school, does it ever end?!?)

JFettig · Jul 23, 2004

If you want, you can get me some dimentions of what you want and I can use autocad to draw one up with measurements. if you know cad, go to a9tech.com and download a free cad program and draw up your own

Jon

Guderian · Jul 23, 2004

so what is the equation?

Just plug in your core measurements into X and A, and plug in your fan layout measurements into X1 and A1. Decide the height you want the shroud to be and plug that in for H. Solve for Y, B, W, and D.

I recommend you do it in millimeters... makes the math a bit easier.

Draw it out on cardboard and cut.

If you want, you can get me some dimentions of what you want and I can use autocad to draw one up with measurements. if you know cad, go to a9tech.com and download a free cad program and draw up your own

core is 10 3/4 in. * 6 in (fedco 2-199

) and fan "area" is currently 10 1/4 in * 4 3/4 in.

Last time I used cad was almost 5 years ago but I think I can remember how.
It'll probably be easier than doing it via MSPaint like the one above.

I'll give it a whirl tonight.
BTW, how big of a download are we talking about.....

JFettig · Jul 23, 2004

its like 13mb not too big, its a very basic cad program, its basicly a ripoff of autocad

Jon

Guderian · Jul 24, 2004

Eureka!!!

drs499m · Jul 24, 2004

Hey, that looks pretty good!

magick_man · Oct 5, 2004

Hey, that looks pretty good!

i just see one problem with it.
THERE ISNT ANY HOLES IN IT.

i think that will kill airflow......

~Magick_Man~

mR|bUNgLe · Oct 5, 2004

LOL..no holes

good job looks good
I like the design think Ill give it a whirl

Guderian · Oct 6, 2004

That was a test run.. using crappy electrical tape no less...

That one has since been retired and replaced by an identical one made from some reinforced cardboard (board game board) and, oddly enough, friction (hockey) tape and hot glue.

A temporary measure, to be sure. But I'm saving up in preparation for being unemployed in a few months for a few months.

Gah... repetitions galore in that post.

magick_man · Oct 6, 2004

That one has since been retired and replaced by an identical one made from some reinforced cardboard (board game board) and, oddly enough, friction (hockey) tape and hot glue.

did you cut holes in this one?

~Magick_Man~

Guderian · Oct 6, 2004

did you cut holes in this one?

Yes.... unfortunately there is no proof (pics) to back me up on it.

HiProfile · Oct 7, 2004

Maybe its just the fact that I like massaging parts to fit (or I never measure right :beer:

), but people using autocad for such stuff amuses me. To each his own, but when the end product is made from tin cans strung together with chicken wire... I will admit, though, it woulda saved a lot of time building my first shroud - I had put a few hours into a steel one, bent & shaped it very nicely, put it on....then noticed I wrote down "8.3 inches" instead of "9.3 inches" long :bang head

Also, don't forget to seperage the two zones inside, I recently dug up a thread on procooling talking about it - can drop temps [by a fraction] for almost no work.

pejcao · Oct 7, 2004

lol, I did the same calculations for mine... Hell, I got confused every time I drew (drawed?) a line on the cardwood 'couse I did it out of a single piece (bending & cutting it), now I need to get rid of the noice/vibration on it 'couse I got it so perfectly fit/tight that the fan produces a "speaker like" effect... :bang head

PS: 4give my english

sunrunner20 · Oct 23, 2004

Cool, I'll probally fallow this design and make it out of metal. Ill post links to my WC rig when its finished. (ill do a 56k BEWARE-ish post once i get my setup finished, could be 3 weeks to 4 months

its a matter of how fast I get money and free time)

Guderian · Oct 23, 2004

leave your self some extra room, since the bends require a few mm's to create.

sunrunner20 · Nov 11, 2004

Hmmm. When I started to make these calculations I noticed something, It would be a LOT less annoying to do the calculations if there was an excel document to do the calculations for you. :beer:

*rolls off to make one* :burn:

sunrunner20 · Nov 12, 2004

Gads I wish I'd been taught trig. all ready. I’m in semester 1 of Algebra 2 which will have trig near the end of semester 2.

Edit: Hmm Found another guide in the watercooling stickys that combined with this make a good duo.

Shroud Math

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