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Date: Mon, 20 Jun 2011 16:54:15 -0500
From: Charlie England <ceengland@bellsouth.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Blower does work
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On 6/20/2011 11:27 AM, Ernest Christley wrote:
> Bill Bradburry wrote:
>> Ernest,
>>
>> Do you have any pictures of this prop carving process?  That sounds 
>> interesting.
>>
>
> I didn't take any pictures, but I should have.
>
> I got a cheap hand planar from Harbor Freight.  It has a guide 
> attachment that mounts in the front.  I replaced that with a 12" 
> length of 1/4" threaded rod.  I removed a case screw at the rear, and 
> drill all the way through the case there with a 5/16" bit, replaced 
> the screw with a 12" length of 5/16" threaded rod.
>
> A half sheet (2' wide) of 3/4" plywood sitting on saw-horses.  Two 4' 
> lenths of 1" steel angle.  I set the angle so that it bracketed the 
> prop blank on each side along the length, and match drilled a 5/16" 
> hole on each end of the angle through the plywood.  Bolted an 8" 
> length of 5/16" threaded into each hole of the plywood.  That gave me 
> a way to accurately adjust the height of each end of the steel angle, 
> and the hand planar will slide along the steel edge on the rod (nuts 
> on the planar's rod keep it from sliding sideways).
>
> Good news is that it was a cheap and easy jig to build, and it gave me 
> a quick and accurate pitch to the prop.  Bad news is that I only added 
> enough pitch to barely pull on the airplane.  At 5000rpm, it would 
> just barely start to pull the airplane uphill.
>
> -- 
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:   
> http://mail.lancaironline.net:81/lists/flyrotary/List.html
>
There's a limit to what I want to learn by doing (making a 'club' prop 
might exceed my limits). :-)

If your prop turns right (from the cockpit) like a Lyc, I can loan you a 
slightly cut down Warnke that was made for a 160 hp Lyc. It will at 
least have enough pitch to cool you off a bit while the engine's running.

Charlie


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    On 6/20/2011 11:27 AM, Ernest Christley wrote:
    <blockquote cite="mid:list-5026257@logan.com" type="cite">Bill
      Bradburry wrote:
      <br>
      <blockquote type="cite">Ernest,
        <br>
        <br>
        Do you have any pictures of this prop carving process?&nbsp; That
        sounds interesting.
        <br>
        <br>
      </blockquote>
      <br>
      I didn't take any pictures, but I should have.
      <br>
      <br>
      I got a cheap hand planar from Harbor Freight.&nbsp; It has a guide
      attachment that mounts in the front.&nbsp; I replaced that with a 12"
      length of 1/4" threaded rod.&nbsp; I removed a case screw at the rear,
      and drill all the way through the case there with a 5/16" bit,
      replaced the screw with a 12" length of 5/16" threaded rod.
      <br>
      <br>
      A half sheet (2' wide) of 3/4" plywood sitting on saw-horses.&nbsp; Two
      4' lenths of 1" steel angle.&nbsp; I set the angle so that it bracketed
      the prop blank on each side along the length, and match drilled a
      5/16" hole on each end of the angle through the plywood.&nbsp; Bolted
      an 8" length of 5/16" threaded into each hole of the plywood.&nbsp;
      That gave me a way to accurately adjust the height of each end of
      the steel angle, and the hand planar will slide along the steel
      edge on the rod (nuts on the planar's rod keep it from sliding
      sideways).
      <br>
      <br>
      Good news is that it was a cheap and easy jig to build, and it
      gave me a quick and accurate pitch to the prop.&nbsp; Bad news is that
      I only added enough pitch to barely pull on the airplane.&nbsp; At
      5000rpm, it would just barely start to pull the airplane uphill.
      <br>
      <br>
      --
      <br>
      Homepage:&nbsp; <a class="moz-txt-link-freetext" href="http://www.flyrotary.com/">http://www.flyrotary.com/</a>
      <br>
      Archive and UnSub:&nbsp;&nbsp;
      <a class="moz-txt-link-freetext" href="http://mail.lancaironline.net:81/lists/flyrotary/List.html">http://mail.lancaironline.net:81/lists/flyrotary/List.html</a>
      <br>
      <br>
    </blockquote>
    <font size="+1"><font face="Arial">There's a limit to what I want to
        learn by doing (making a 'club' prop might exceed my limits).
        :-)<br>
        <br>
        If your prop turns right (from the cockpit) like a Lyc, I can
        loan you a slightly cut down Warnke that was made for a 160 hp
        Lyc. It will at least have enough pitch to cool you off a bit
        while the engine's running.<br>
        <br>
        Charlie<br>
        <br>
        <br>
      </font></font>
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