From: Sky2high@aol.com
Message-ID: <e6629e8b.24d19aed@aol.com>
Date: Thu, 29 Jul 1999 07:54:21 EDT
Subject: Re: Prop Spinner
To: wrumburg@cdicorp.com, lancair.list@olsusa.com
Mime-Version: 1.0

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In a message dated 7/26/99 6:08:55 AM Central Daylight Time, 
wrumburg@cdicorp.com writes:

<<     What are the "doublers" you've mentioned? Maybe they're peculiar
 to a constant speed propeller?
    At any rate, my installation, with only an aluminum spinner
 backplate and Lancair's carbon spinner (fastened with only stainless pop
 rivets and nutplates) has functioned well, with no problems whatsoever.
  >>

Bill,

"Doublers" are approximately 1.5 inch by 2.5 inch by .125 plates located at 
the backplate bolt holes to reinforce the backplate because of reported 
cracking around the holes.  These are supplied by Lancair.

My Lancair purchased spinner (circa 1990) is made of fiberglass with only the 
aft 1/3 containing carbon.  The Lancair recommendation was to reinforce the 
blade cutout with glass because of reported cracking around the forward edge 
of the cutout (ahead of the carbon).  I have also done that process.  The 
spinner has fine cracks in the cosmetic coating (paint) from flexing.

Note: Late reply is due to Oshkosh attendance.

Thanks,

Scott Krueger
N92EX
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