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tonyrenshaw268(at)gmail.c Guest
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Posted: Sat Feb 25, 2017 3:43 am Post subject: Tailplane retention Layups |
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I would like to ask about whether most people managed to get the BID cloth into the recess on the underside of the tailplanes for Mod 73, Tailplane Retention? To me it would seem likely people cut the cloth and overlapped it in the corners, but my local Europa mentor guru managed to do it without cutting the plies, twice. I'm anticipating disaster with this layup and wondering about whether those that have gone before me can offer up some sage advice. Anything gratefully accepted.Thanks
Tony Renshaw
Sydney, Aussie
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JonathanMilbank
Joined: 14 Apr 2012 Posts: 384 Location: Aberdeen area
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Posted: Sat Feb 25, 2017 1:05 pm Post subject: Re: Tailplane retention Layups |
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Tony, probably I was the first person to suffer tailplane bush disbonding and that was before the sad accident which killed two guys in Wales, giving rise to mod 73 and the mod to strengthen the security of wing root pins. I can't remember how the lay-ups were done with the bid when I made my own approved repair, nor when I had to repeat the process on both tailplanes after the mods were introduced. Too long ago!
One thing which became known at that time was that some people had enlarged the tailplane pip-pin recesses to their own requirements to do things like fitting flush and easily removable covers to the recesses. What this did in some cases was to increase the distance between the pip-pin head and the recess inboard sidewall, which would allow the tailplane to migrate off the drive pins if ever a bush disbonded again.
Being ultra-cautious in such matters, I decided to create another line of defence by cutting and shaping little pieces of plywood to neatly fit the gap between the pip-pin heads and the recess inboard sidewalls and bonded them in place with resin+flox. Thus there is no possibility for the tailplanes to migrate off the drive pins in the event of a disbond, provided that the pip-pins are in.
To cover over the recesses in the tailplane tops, I use white adhesive tape.
| - The Matronics Europa-List Email Forum - | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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Last edited by JonathanMilbank on Sun Feb 26, 2017 1:47 am; edited 1 time in total |
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Duncan McFadyean
Joined: 18 Jan 2011 Posts: 218
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Posted: Sat Feb 25, 2017 2:08 pm Post subject: Tailplane retention Layups |
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Tony,
It's entirely possible and not that difficult to get the cloth in to the recess in one piece.
Trick is to lay in four sides with the cloth weave "square", then work down the corners by shrinking the cloth in to the corners.
Repeat at a rotational offset of 45 degrees.
Duncan McF.
Quote: | ----Original Message----
From: tonyrenshaw268(at)gmail.com
Date: 25/02/2017 11:41
To: <europa-list(at)matronics.com>
Subj: Tailplane retention Layups
I would like to ask about whether most people managed to get the BID cloth into the recess on the underside of the tailplanes for Mod 73, Tailplane Retention? To me it would seem likely people cut the cloth and overlapped it in the corners, but my local Europa mentor guru managed to do it without cutting the plies, twice. I'm anticipating disaster with this layup and wondering about whether those that have gone before me can offer up some sage advice. Anything gratefully accepted.Thanks
Tony Renshaw
Sydney, Aussie
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| - The Matronics Europa-List Email Forum - | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Europa-List |
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