Here is a rough pic of the box i made. Sorry its not too good, im not that good with photoshop. This was built using 3/4's mdf btw. THanks guys i really need help

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- 06-09-2003 #1
## Help me fig. the volume on this box, i need help!

Here is a rough pic of the box i made. Sorry its not too good, im not that good with photoshop. This was built using 3/4's mdf btw. THanks guys i really need help

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- 06-09-2003 #2
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2.58

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- 06-09-2003 #3
If the measurements you listed are external.

With 3/4" MDF the box has 1.63cu ft. of air space.

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- 06-09-2003 #4
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*Originally posted by slipknot87420*

**2.58**

Assuming the dimensions given are external, break the box into a triangle and a rectangle, and factor out the width of the MDF. Using the pythagorean theorem, the internal dimensions of the triangle are 3.75 x 15.04 x 15.5, and it's 48.5 long. The rectangle is 2.25 x 15.04 and 48.5 long. The squre inches of the triangle are 1367.7, and the rectangle is 1641.24, for a total of 3008.94. Divided by 1728 equals 1.74 cuft.

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- 06-09-2003 #5
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*Originally posted by Gauntlet*

**Not quite sure how you came to that number....**

Assuming the dimensions given are external, break the box into a triangle and a rectangle, and factor out the width of the MDF. Using the pythagorean theorem, the internal dimensions of the triangle are 3.75 x 15.04 x 15.5, and it's 48.5 long. The rectangle is 2.25 x 15.04 and 48.5 long. The squre inches of the triangle are 1367.7, and the rectangle is 1641.24, for a total of 3008.94. Divided by 1728 equals 1.74 cuft.

ok 7.5+3 divided by 2 = 5.25 ok now 5.25x50x17=4462.5 ok now you divide that by 1728 and that = 2.582

93 blazer

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- 06-09-2003 #6
i got 1.63 cuft

when in doubt, check the ground.

1728

- 06-09-2003 #7
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*Originally posted by slipknot87420*

**ok 7.5+3 divided by 2 = 5.25 ok now 5.25x50x17=4462.5 ok now you divide that by 1728 and that = 2.582**

*"The world is full of people who want nothing short of perfect,*

but settle for less, blinded by their quest for purpose."

- Slug

- 06-09-2003 #8
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*Originally posted by Gauntlet*

**Why did you add 7.5 and 3 and divide it by 2? And you forgot to factor out the MDF.**

because how the box is shaped you just take the average from the wall that is slanted adn yeah i know i didnt take out mdf oh well....

93 blazer

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- 06-09-2003 #9
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*Originally posted by slipknot87420*

**because how the box is shaped you just take the average from the wall that is slanted adn yeah i know i didnt take out mdf oh well....**

*"The world is full of people who want nothing short of perfect,*

but settle for less, blinded by their quest for purpose."

- Slug

- 06-09-2003 #10
Thanks guys for the help, u all are the best, i really **** at this stuff, so id say around 1.70?

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- 06-09-2003 #11
*Originally posted by Afboy143*

**Thanks guys for the help, u all are the best, i really **** at this stuff, so id say around 1.70?**

when in doubt, check the ground.

1728

- 06-09-2003 #12
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ok you guys were right after wood displacment 1.631

and i was right before wood displacment and yeah that is how how you find the volume of an enclosure like he has

93 blazer

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- 06-09-2003 #13
*Originally posted by Gauntlet*

**The average from the wall that is slanted??? You have to break the box up into separate shapes and figure out the volume of each individually**

Then you can figure up the air space as if it was a rectangle.

3.75" x 15.5" x 48.5" = 2819.06sqin./1728 = 1.631cuft.

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- 06-10-2003 #14
**** i swear u all are the best, thanks fo everything, this is why i love this forum! so much help. Hmmm How much polyfil should i add to this box cuz its a lil too small?

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- 06-10-2003 #15
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*Originally posted by Afboy143*

****** i swear u all are the best, thanks fo everything, this is why i love this forum! so much help. Hmmm How much polyfil should i add to this box cuz its a lil too small?**

but settle for less, blinded by their quest for purpose."

- Slug

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