Posted by Wayne Parham [ 65.69.120.122 ] on January 16, 2004 at 13:57:19:

In Reply to: Re: pi corner horn posted by David Morrison on January 16, 2004 at 12:51:10:

Several models use a rectangular port; Some cylinder diameters are hard to obtain so I use a box-shaped port instead. And as long as the port isn't too small and power very high, port sound isn't a problem. But if the port is too small and airspeed becomes too high, you'll hear 'em chuff.

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