Menu
Forum
What's new
New posts
Live Activity
Search forums
Members
Registered members
Classifieds Member Feedback
Car Audio Discussion
General Car Audio
Car Audio Build Logs
Car Audio Equipment
Subwoofers
Speakers
Amplifiers
Head Units
Car Audio Help
Wiring, Electrical and Installation
Enclosure Design & Construction
Car Audio Classifieds
Car Audio Classifieds
Car Audio Wanted
Classifieds Member Feedback
Gallery
New media
New comments
Search media
SHOP
Shop Head Units
Shop Amplifiers
Shop Speakers
Shop Subwoofers
Shop eBay Car Audio
Test
Forum
Search
Search titles only
Search titles only
Log in / Join
Search
Search titles only
Search titles only
What's new
New posts
Live Activity
Search forums
Members
Registered members
Classifieds Member Feedback
Menu
Reply to thread
Forum
Car Audio Help
Enclosure Design & Construction
How to calculate cubic feet of kerfed box?
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Message
<blockquote data-quote="bbeljefe" data-source="post: 8157754" data-attributes="member: 655960"><p>Figure the area of a circle that would be the same size as the rounds you're making and then deduct 25% (for each 90° kerf) of that area from the square area the box would have if it were not rounded.</p><p></p><p>For example:</p><p></p><p>1' * 1' * 1' square box = 1728 cubic inches (net volume).</p><p></p><p>Now lets kerf two corners of that box based on 4" circles.</p><p></p><p>Pi*R² or, 3.14159 * 2 * 2 = 12.56</p><p></p><p>circle surface area * height or, 12.56 * 12 = 150.72 inⁿ ←This is the total volume of a 4" cylinder that's 12" tall.</p><p></p><p>Divide that volume by 4... 150.72 / 4 = 37.68 inⁿ for each kerfed corner.</p><p></p><p>Take your total 1728 inⁿ and subtract each rounded corner volume.... 1728 - 37.68 - 37.68 = 1652 inⁿ or, .956 ftⁿ.</p></blockquote><p></p>
[QUOTE="bbeljefe, post: 8157754, member: 655960"] Figure the area of a circle that would be the same size as the rounds you're making and then deduct 25% (for each 90° kerf) of that area from the square area the box would have if it were not rounded. For example: 1' * 1' * 1' square box = 1728 cubic inches (net volume). Now lets kerf two corners of that box based on 4" circles. Pi*R² or, 3.14159 * 2 * 2 = 12.56 circle surface area * height or, 12.56 * 12 = 150.72 inⁿ ←This is the total volume of a 4" cylinder that's 12" tall. Divide that volume by 4... 150.72 / 4 = 37.68 inⁿ for each kerfed corner. Take your total 1728 inⁿ and subtract each rounded corner volume.... 1728 - 37.68 - 37.68 = 1652 inⁿ or, .956 ftⁿ. [/QUOTE]
Insert quotes…
Verification
Post reply
Forum
Car Audio Help
Enclosure Design & Construction
How to calculate cubic feet of kerfed box?
Top
Menu
Home
Refresh