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Alternate port shape for Four Pi cabinet [message #88308]

Tue, 03 July 2018 10:48

tubino
Messages: 13
Registered: May 2009

Chancellor

The Four Pi plans show a single rectangular port of 3.5" x 6", or 21 sq in cross-section. An equivalent area round port would be 5.2". (If Pi*Rsquared - 21, r= 2.59, d = 5.2)

If I wanted the equivalent in two round ports, I calculate 2 ports of 10.5 sq in area, or diameter of 3.66" each. That's close to 3 5/8" inside diameter.

Does anyone see a problem with those numbers? Does anyone see a problem with using two round ports adding up to the same cross-section as the original?

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[Message index]

		Alternate port shape for Four Pi cabinet By: tubino on Tue, 03 July 2018 10:48
		Re: Alternate port shape for Four Pi cabinet By: Wayne Parham on Tue, 03 July 2018 14:20
		Re: Alternate port shape for Four Pi cabinet By: tubino on Wed, 04 July 2018 06:16

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