From: "Finn Lassen finn.lassen@verizon.net" <flyrotary@lancaironline.net>
Received-SPF: pass
 receiver=logan.com; client-ip=66.163.185.31; envelope-from=finn.lassen@verizon.net
Subject: Re: [FlyRotary] Re: Balance prop
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
References: <list-1166506@logan.com>
Message-ID: <004e1e91-6624-4941-3521-84beb57383fd@verizon.net>
Date: Thu, 28 Jan 2021 10:25:23 -0500
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-1166506@logan.com>
Content-Type: multipart/alternative;
 boundary="------------26A82BF72F4FDECE51B46CE9"
Content-Language: en-US
Content-Length: 6433

This is a multi-part message in MIME format.
--------------26A82BF72F4FDECE51B46CE9
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 8bit

Interesting! That may explain my difficulty in getting a clear o'scope 
picture from accelerometer.
Need to first remove any flywheel/engine imbalance that may obscure prop 
imbalance.

Finn

On 1/28/2021 12:39 AM, Sboese sboese@uwyo.edu wrote:
> Matt,
>
> One cannot balance the prop by placing the balance weights on the 
> flywheel due to the gear ratio of the psru.  I chose to dynamically 
> balance at the flywheel with the prop removed, then install the prop, 
> and finally dynamically balance at the prop.  That appears to have 
> given good results for me.
>
> Steve Boese
>
>
>
>> On Jan 27, 2021, at 6:09 PM, Matt Boiteau mattboiteau@gmail.com 
>> <flyrotary@lancaironline.net> wrote:
>>
>> ﻿
>>
>> ◆ This message was sent from a non-UWYO address. Please exercise 
>> caution when clicking links or opening attachments from external sources.
>>
>>
>> How does everyone balance their prop, do they gain access to the 
>> flywheel and add bolts/washers there like a standard aircraft engine? 
>> I'm looking to balance the prop around X60 (Williston, FL), and I 
>> forget who, but someone said we could rent one nearby?
>>
>>
>> Had a 301 ss slip joint bellow for the exhaust and it cracked, which 
>> set me back a few months. The end of my exhaust must have too much 
>> vibration, I will figure out more rubber mounts with the welder to 
>> stop the end vibrating. Bought a 2.75" inconel split joint bellow 
>> from SPD exhaust that should handle the heat.
>> http://www.spdexhaust.com/pdfs/AccPDFs/Bellows.pdf
>>
>>
>> - Matt Boiteau


---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus

--------------26A82BF72F4FDECE51B46CE9
Content-Type: text/html; charset=utf-8
Content-Transfer-Encoding: 8bit

<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  </head>
  <body text="#000000" bgcolor="#FFFFFF">
    <div class="moz-cite-prefix">Interesting! That may explain my
      difficulty in getting a clear o'scope picture from accelerometer.<br>
      Need to first remove any flywheel/engine imbalance that may
      obscure prop imbalance.<br>
      <br>
      Finn<br>
      <br>
      On 1/28/2021 12:39 AM, Sboese <a class="moz-txt-link-abbreviated" href="mailto:sboese@uwyo.edu">sboese@uwyo.edu</a> wrote:<br>
    </div>
    <blockquote type="cite" cite="mid:list-1166506@logan.com">
      <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
      Matt,
      <div><br>
      </div>
      <div>One cannot balance the prop by placing the balance weights on
        the flywheel due to the gear ratio of the psru.  I chose to
        dynamically balance at the flywheel with the prop removed, then
        install the prop, and finally dynamically balance at the prop.
         That appears to have given good results for me.</div>
      <div><br>
      </div>
      <div>Steve Boese<br>
        <br>
        <div dir="ltr"><br>
        </div>
        <div dir="ltr"><br>
          <blockquote type="cite">On Jan 27, 2021, at 6:09 PM, Matt
            Boiteau <a class="moz-txt-link-abbreviated" href="mailto:mattboiteau@gmail.com">mattboiteau@gmail.com</a>
            <a class="moz-txt-link-rfc2396E" href="mailto:flyrotary@lancaironline.net">&lt;flyrotary@lancaironline.net&gt;</a> wrote:<br>
            <br>
          </blockquote>
        </div>
        <blockquote type="cite">
          <div dir="ltr">﻿
            <div style="border:solid red 2.25pt;padding:1.0pt 4.0pt
              1.0pt 4.0pt">
              <p class="MsoNormal" style="line-height:11.35pt">◆ This
                message was sent from a non-UWYO address. Please
                exercise caution when clicking links or opening
                attachments from external sources.</p>
            </div>
            <br>
            <div>
              <div dir="ltr">How does everyone balance their prop, do
                they gain access to the flywheel and add bolts/washers
                there like a standard aircraft engine? I'm looking to
                balance the prop around X60 (Williston, FL), and I
                forget who, but someone said we could rent one nearby?<br>
                <br>
                <br>
                Had a 301 ss slip joint bellow for the exhaust and it
                cracked, which set me back a few months. The end of my
                exhaust must have too much vibration, I will figure out
                more rubber mounts with the welder to stop the end
                vibrating. Bought a 2.75" inconel split joint bellow
                from SPD exhaust that should handle the heat.<br>
                <a
                  href="http://www.spdexhaust.com/pdfs/AccPDFs/Bellows.pdf"
                  moz-do-not-send="true">http://www.spdexhaust.com/pdfs/AccPDFs/Bellows.pdf</a><br>
                <br>
                <br clear="all">
                <div>
                  <div dir="ltr" class="gmail_signature"
                    data-smartmail="gmail_signature">
                    <div dir="ltr">
                      <div>
                        <div dir="ltr">- Matt Boiteau</div>
                      </div>
                    </div>
                  </div>
                </div>
              </div>
            </div>
          </div>
        </blockquote>
      </div>
    </blockquote>
    <p><br>
    </p>
  <div id="DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2">
<br /><br />
<hr style='border:none; color:#909090; background-color:#B0B0B0; height: 1px; width: 99%;' />
<table style='border-collapse:collapse;border:none;'>
	<tr>
		<td style='border:none;padding:0px 15px 0px 8px'>
			<a href="https://www.avast.com/antivirus">
				<img border=0 src="https://static.avast.com/emails/avast-mail-stamp.png" alt="Avast logo" />
			</a>
		</td>
		<td>
			<p style='color:#3d4d5a; font-family:"Calibri","Verdana","Arial","Helvetica"; font-size:12pt;'>
				This email has been checked for viruses by Avast antivirus software.
				<br><a href="https://www.avast.com/antivirus">www.avast.com</a>
			</p>
		</td>
	</tr>
</table>
<br />
<a href="#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2" width="1" height="1"> </a></div></body>
</html>

--------------26A82BF72F4FDECE51B46CE9--