Finn Lassen wrote:

Here's my attempt on a simple muffler.

2" tubing, 7.75" long, 40 1/4" holes and end fishtailed to 1/4" (x 3"),
2.7 sq inch slightly less area than the 2.9 sq inch of the 2" tubing,
but more than the 2.2 sq inch area of the 1.75 header tubes. All tubes
are .035 walls.

I intend to enclose it in a slightly longer 3" tube, open at both ends.

Going to the airport to test it now. Will let you know how it works and
sounds.

Is there any way to send a sound? Maybe a .waw file?

Finn

Probably but I don't have the capability to test it. A Radio Shack
DB meter held at some standard distance from the plane would be a better way
of quantifying noise.

Paul Lamar
 
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