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randyc1

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How do you Calculate a curved cabinet.

18W x 19H x 19D similar to "Warpdrv's Custom" build ??

Zeitgeist

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How do you Calculate a curved cabinet.

18W x 19H x 19D similar to "Warpdrv's Custom" build ??
He has multiple custom builds. Do you have a specific link?

Most curves are gentle - so they don't tend to have a big impact on volume.

I believe that Google Sketchup will let you calculate the volume of an object, so drawing it and then looking at the calculated volume might be a good option.

randyc1

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randyc1

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Mike P. said:
What's the width of the back panel of your design?
Have'nt designed it yet, but probably front panel will 19W x 20H x20D back would be around 14.5 W,... about 3/4 Width of front.

robbo266317

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U think ??? Look at the back panel how smaller the width is ??. That must make an significant differemce ??
Just work out the area of the trapezoid formed by the four corners and multiply by the height to get the volume.
i.e. (width_front + width_rear)/2 multiplied by depth and height.

randyc1

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Just work out the area of the trapezoid formed by the four corners and multiply by the height to get the volume.
i.e. (width_front + width_rear)/2 multiplied by depth and height.
So if i follow that , it comes to 3.87 cuft. Ext Vol ??

dboff01

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So if i follow that , it comes to 3.87 cuft. Ext Vol ??
That sounds about right as the full external volume if a simple box (20" x 20" x 19") is about 4.4cf. About 0.5-0.6cf less seems reasonable if the box is to taper in the back.

Mike P.

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(width_front + width_rear)/2 multiplied by depth and height

17.5 + 13 = 30.5 /2 = 15.25

15.25 x 18.5 x 18.5 = 5219.3

5219.3 cu. inches = 3 cu.ft. internal volume.

Math isn't my strong point, am I doing this wrong?

robbo266317

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No Mike, your math is correct. It is I who is dazed and confused. :dumbcrazy:
I was using external measurements instead of real world internal measurements.
My apologies. Too many things on my mind at the moment.

As usual you see the big picture. :TT

Cheers,
Bill.

P.S you still need to subtract the driver and bracing volumes from that as well don't you? :scratch:

Mike P.

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Yes, subtracting both gives the net internal volume. Anyways, glad we got it figured out. :T

randyc1

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robbo266317 said:
Yes the volume is about 3.87 cu ft.
Then you need to subtract the driver volume and any bracing.
Also wall thickness ?? For Int Vol

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