Mailing List lml@lancaironline.net Message #40168
From: Marvin Kaye <marv@lancaironline.net>
Subject: Re: Outboard elevator hinge bleeding
Date: Mon, 19 Feb 2007 16:19:31 -0500
To: <lml>
Posted for "Jim Nordin" <panelmaker@earthlink.net>:

 I asked someone at Lancair years ago about this problem and his (name
 withheld) answer was simple.
 Misalignment is a problem with two hinges on the same elevator. Put one
 hinge on that is the length of the elevator attachment (26.75") and make
 sure it's straight ... not wavy in any axis. That was a statement from a
 previous support person there.
 
 I think the Teflon is the best fix for installed hinges. And you might take
 a look to make sure the best job of alignment has been done. The fit can be
 improved without damage to the paint job if you're careful.
 Jim
 
"""
 Posted for John Spry <spry@paradise.net.nz>:
 
  I've done 30 odd hours in my recently completed 320 (small tail) and
 notice
 grey streaks (aluminium I think) coming from the outboard elevator hinges .
  Everything seems tight - has anyone got any ideas what may be causing it
 and
 the best fix.
  
  Thanks
 
 [It's strange to hear it reported in a plane with only 30 hours on it, but
 it's a well-documented phenomenon.  The grey streaks are most likely
 aluminum,
 as you surmised, resulting from the wear the hinge knuckles are seeing from
 rotating around the hinge pins.  The most typical fix is to ream the
 knuckles
 and go to the teflon tube hinge pin sleeves.  Search the archive for
 "airframe
 vibration".  One of our members sells the teflon and hinge pin kits... I'm
 sure he'll jump in.   <marv>     ]
"""
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