From: "Neil Unger 12348ung@gmail.com" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] Re: mufflers
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
References: <list-13411564@logan.com>
Message-ID: <86186cc9-afbb-6caa-abdf-ce5efd29b0cc@gmail.com>
Date: Wed, 22 Jan 2020 16:19:01 +1100
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Andrew,

                    After talking to Chris this morning, I wonder if the 
"auger flight" up the straight through muffler would quieten it down to 
what Chris has in the one pictured.  Just trying to save work.

Neil.

On 1/22/2020 11:39 AM, Andrew Martin andrew@martinag.com.au wrote:
> Neil,
> this is interesting information, might just make another exhaust,
> mine is real simple, short & robust. (the milk tin is just a heat 
> shield). but I also used bigger & more hole area in the inner tube, 
> reports I get are that it is no louder than any other aircraft around 
> here just "different". above about 4000'agl had people say they never 
> even notice me fly over, but I guess this is due to placement of 
> tailpipe not pointing at the ground.
> But If I can get quieter & "different" all the better.
> Andrew
>
>
>
>
>
> On Wed, Jan 22, 2020 at 8:01 AM Neil Unger 12348ung@gmail.com 
> <mailto:12348ung@gmail.com> <flyrotary@lancaironline.net 
> <mailto:flyrotary@lancaironline.net>> wrote:
>
>     Mat,
>
>                       Spoke with Chris again, and he says that the
>     current
>     setup as per the photo was much quieter than the straight
>     through.  Said
>     that with his current muffler (pictured) no one could hear him
>     coming,
>     whereas with it as a straight through it was still the "rotary"
>     sound.
>     Interesting and confusing.   Neil.
>
>
>     --
>     Homepage: http://www.flyrotary.com/
>     Archive and UnSub:
>     http://mail.lancaironline.net:81/lists/flyrotary/List.html
>
>
> --
> Homepage:  http://www.flyrotary.com/
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    <p>Andrew,</p>
    <p>                   After talking to Chris this morning, I wonder
      if the "auger flight" up the straight through muffler would
      quieten it down to what Chris has in the one pictured.  Just
      trying to save work.</p>
    <p>Neil.<br>
    </p>
    <div class="moz-cite-prefix">On 1/22/2020 11:39 AM, Andrew Martin
      <a class="moz-txt-link-abbreviated" href="mailto:andrew@martinag.com.au">andrew@martinag.com.au</a> wrote:<br>
    </div>
    <blockquote type="cite" cite="mid:list-13411564@logan.com">
      <meta http-equiv="content-type" content="text/html; charset=UTF-8">
      <div dir="ltr">
        <div dir="ltr">
          <div>Neil, <br>
          </div>
          <div>this is interesting information, might just make another
            exhaust, <br>
          </div>
          <div>mine is real simple, short &amp; robust. (the milk tin is
            just a heat shield). but I also used bigger &amp; more hole
            area in the inner tube, reports I get are that it is no
            louder than any other aircraft around here just "different".
            above about 4000'agl had people say they never even notice
            me fly over, but I guess this is due to placement of
            tailpipe not pointing at the ground.<br>
          </div>
          <div>But If I can get quieter &amp; "different" all the
            better.<br>
          </div>
          <div>
            <div>
              <div dir="ltr" class="gmail_signature"
                data-smartmail="gmail_signature">
                <div dir="ltr">
                  <div>
                    <div dir="ltr">
                      <div>Andrew<br>
                      </div>
                      <div><br>
                        <br>
                        <br>
                      </div>
                    </div>
                  </div>
                </div>
              </div>
            </div>
            <br>
          </div>
        </div>
        <br>
        <div class="gmail_quote">
          <div dir="ltr" class="gmail_attr">On Wed, Jan 22, 2020 at 8:01
            AM Neil Unger <a href="mailto:12348ung@gmail.com"
              moz-do-not-send="true">12348ung@gmail.com</a> &lt;<a
              href="mailto:flyrotary@lancaironline.net"
              moz-do-not-send="true">flyrotary@lancaironline.net</a>&gt;
            wrote:<br>
          </div>
          <blockquote class="gmail_quote" style="margin:0px 0px 0px
            0.8ex;border-left:1px solid
            rgb(204,204,204);padding-left:1ex">Mat,<br>
            <br>
                              Spoke with Chris again, and he says that
            the current <br>
            setup as per the photo was much quieter than the straight
            through.  Said <br>
            that with his current muffler (pictured) no one could hear
            him coming, <br>
            whereas with it as a straight through it was still the
            "rotary" sound.  <br>
            Interesting and confusing.   Neil.<br>
            <br>
            <br>
            --<br>
            Homepage:  <a href="http://www.flyrotary.com/"
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          </blockquote>
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      <pre class="moz-quote-pre" wrap="">--
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