Mailing List flyrotary@lancaironline.net Message #44648
From: Ernest Christley <echristley@nc.rr.com>
Subject: Re: [FlyRotary] Muffler design (was 20B isssues . . )
Date: Tue, 06 Jan 2009 10:12:24 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Al Gietzen wrote:
Unless I did the math wrong; the maximum filling fraction you can get
 with these rods is about .8.  So I think there would be a problem there.

  
Well, I've worked out a way to put together a simple experimental bench-top apparatus that will allow me to quickly put together various crystal arrangements.  I've got some recordings of rotaries running.  I'll set up a configuration, pipe the recording into one end, record it on the other, and then do a spectral analysis on the new recording.  Running the analysis on a recording without the intervening filter will be my control.

Now that I'm excited.  I've got to try to get some work done. 8*)
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