Car Audio Central - Ultimate Car Audio Forum and Community

Anyone have a good way of doing this semi accurately without using water/sand?

depends on the shape

http://caraudiocentral.net/ryan/images/slade2.jpg



I was looking for a formula. I guess I can calculate it based off the cylinder method and call it good enough. Trying to calculate out the area between the cone/spider just isnt going to happen...

I just like to be as precise as possible...

id say try and find the most similar looking sub that lists displacement and go with that, atleast for a starting point

pi*r^2 * (bore^2) * stroke * # of cylinders = displacement!

of divide the box into manageable shapes like triangles, rectangles, etc, and figure it in portions, then add it up.

THis isnt an engine, the sub silly.

Funny you mention engine displacement as it was one of the first links that came up.

I guess that rough displacement Im gonna calculate is it...

Oh well, close enough

I actually just started pre calc class and we'll be doing conic sections and whatnot near the end.

solacedagony wrote:I actually just started pre calc class and we'll be doing conic sections and whatnot near the end.

Man how I wish I could go back to that class. I just started my Calc III class and Differential Equations this semester. Its definitely going to be a bitch.

You will need a function in order to calculate the area by using conic sections though.

Chris from MI wrote:Man how I wish I could go back to that class. I just started my Calc III class and Differential Equations this semester. Its definitely going to be a bitch.

i feel you. im in calc 3 right now, going in diff eq next semester (hopefully). its hard... so is phys2...

packing peanuts are fairly clean and easy to get ahold of. easy to use for finding sub displacement and box displacement