From: "Finn Lassen finn.lassen@verizon.net" <flyrotary@lancaironline.net>
Received-SPF: pass
 receiver=logan.com; client-ip=66.163.189.83; envelope-from=finn.lassen@verizon.net
Subject: Re: [FlyRotary] Re: Rotary Engine Noise
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
References: <list-223815@logan.com>
Message-ID: <def5ae5b-2915-21a7-4d4a-b896e30aa27d@verizon.net>
Date: Sat, 9 May 2020 10:15:14 -0400
User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:52.0) Gecko/20100101
 Thunderbird/52.9.1
MIME-Version: 1.0
In-Reply-To: <list-223815@logan.com>
Content-Type: multipart/alternative;
 boundary="------------415BC05D756B775CE41E959E"
Content-Language: en-US
Content-Length: 5773

This is a multi-part message in MIME format.
--------------415BC05D756B775CE41E959E
Content-Type: text/plain; charset=windows-1252; format=flowed
Content-Transfer-Encoding: 8bit

Opposite of what I understand:
You want a large external radius and a smaller inside radius.

I've in vain been searching for the NACA paper that Tracy Crook get the 
exact number (internal/external) from. Probably somewhere between 0.5 
and 0.8.

Finn

On 5/8/2020 11:02 PM, Terry Adams terrywadams@sbcglobal.net wrote:
> You may want to test the lip/airflow on the scoop to your cooling.� 
> Adding a generous radius to the inside may add considerable 
> airflow.� Consult the work and directions given by Peter Garrison 
> and his plane Melmoth (www.melmoth2.com).� jm2c fwiw
>
> Terry
>
> On 5/8/2020 3:34 PM, 12348ung@gmail.com wrote:
>> Le Roux,
>>                      You have done a great job so I hesitate to add photos of
>> my work, but here goes   Neil.
>>
>> -----Original Message-----
>> From: Rotary motors in aircraft<flyrotary@lancaironline.net>  
>> Sent: Friday, May 8, 2020 10:31 PM
>> To: Rotary motors in aircraft<flyrotary@lancaironline.net>
>> Subject: [FlyRotary] Re: Rotary Engine Noise
>>
>> Hello Le Roux:
>> This Frontal photo tells you quite a bit about my cowlings and my airplane.
>> The top two inlets are for my oil coolers (2 x Fluidyne DB-30416) and the
>> bottom inlet is for my radiator (Griffin 2-58185-X).
>> With a "Chubby Cubby" drag is given, things like Aero-Turbine mufflers and
>> long exhaust pipes (to get noise behind cabin) are not too significant.
>>
>>
>> Jeff: Thanks for taking us aboard the flight over the Ottawa River!
>>
>> I am a relative new member on the group, and are not on terms, with the FWF
>> installations of the members.
>>
>> Is it possible to post some info of your 13B installation and cowling?
>>   
>>
>> Thanks Le Roux Breytenbach
>>
>> South Africa
>>
>> --
>> Homepage:http://www.flyrotary.com/
>> Archive and UnSub:http://mail.lancaironline.net:81/lists/flyrotary/List.html
>
> -- 
> Communication ink and paper free


--------------415BC05D756B775CE41E959E
Content-Type: text/html; charset=windows-1252
Content-Transfer-Encoding: 8bit

<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html;
      charset=windows-1252">
  </head>
  <body text="#000000" bgcolor="#FFFFFF">
    <div class="moz-cite-prefix">Opposite of what I understand:<br>
      You want a large external radius and a smaller inside radius.<br>
      <br>
      I've in vain been searching for the NACA paper that Tracy Crook
      get the exact number (internal/external) from. Probably somewhere
      between 0.5 and 0.8.<br>
      <br>
      Finn<br>
      <br>
      On 5/8/2020 11:02 PM, Terry Adams <a class="moz-txt-link-abbreviated" href="mailto:terrywadams@sbcglobal.net">terrywadams@sbcglobal.net</a> wrote:<br>
    </div>
    <blockquote type="cite" cite="mid:list-223815@logan.com">
      <meta http-equiv="Content-Type" content="text/html;
        charset=windows-1252">
      <font face="Times New Roman, Times, serif">You may want to test
        the lip/airflow on the scoop to your cooling.� Adding a
        generous radius to the inside may add considerable airflow.�
        Consult the work and directions given by Peter Garrison and his
        plane Melmoth (<a class="moz-txt-link-abbreviated"
          href="http://www.melmoth2.com" moz-do-not-send="true">www.melmoth2.com</a>).�
        jm2c fwiw<br>
        <br>
        Terry<br>
      </font><br>
      <div class="moz-cite-prefix">On 5/8/2020 3:34 PM, <a
          class="moz-txt-link-abbreviated"
          href="mailto:12348ung@gmail.com" moz-do-not-send="true">12348ung@gmail.com</a>
        wrote:<br>
      </div>
      <blockquote type="cite" cite="mid:list-223138@logan.com">
        <pre class="moz-quote-pre" wrap="">Le Roux,
                    You have done a great job so I hesitate to add photos of
my work, but here goes   Neil.

-----Original Message-----
From: Rotary motors in aircraft <a class="moz-txt-link-rfc2396E" href="mailto:flyrotary@lancaironline.net" moz-do-not-send="true">&lt;flyrotary@lancaironline.net&gt;</a> 
Sent: Friday, May 8, 2020 10:31 PM
To: Rotary motors in aircraft <a class="moz-txt-link-rfc2396E" href="mailto:flyrotary@lancaironline.net" moz-do-not-send="true">&lt;flyrotary@lancaironline.net&gt;</a>
Subject: [FlyRotary] Re: Rotary Engine Noise

Hello Le Roux:
This Frontal photo tells you quite a bit about my cowlings and my airplane.
The top two inlets are for my oil coolers (2 x Fluidyne DB-30416) and the
bottom inlet is for my radiator (Griffin 2-58185-X).
With a "Chubby Cubby" drag is given, things like Aero-Turbine mufflers and
long exhaust pipes (to get noise behind cabin) are not too significant. 


Jeff: Thanks for taking us aboard the flight over the Ottawa River!

I am a relative new member on the group, and are not on terms, with the FWF
installations of the members.

Is it possible to post some info of your 13B installation and cowling?
 

Thanks Le Roux Breytenbach

South Africa
</pre>
        <br>
        <fieldset class="mimeAttachmentHeader"></fieldset>
        <pre class="moz-quote-pre" wrap="">--
Homepage:  <a class="moz-txt-link-freetext" href="http://www.flyrotary.com/" moz-do-not-send="true">http://www.flyrotary.com/</a>
Archive and UnSub:   <a class="moz-txt-link-freetext" href="http://mail.lancaironline.net:81/lists/flyrotary/List.html" moz-do-not-send="true">http://mail.lancaironline.net:81/lists/flyrotary/List.html</a>
</pre>
      </blockquote>
      <br>
      <pre class="moz-signature" cols="72">-- 
Communication ink and paper free</pre>
    </blockquote>
    <p><br>
    </p>
  </body>
</html>

--------------415BC05D756B775CE41E959E--