Hi! Troy Maynor.
Re:- Lift Pin Aluminium Implants .I recently did an e-mail to Paul Lowe and
Norbert Hoffman on this vexing subject, since I am short of time I will try
to copy it to you.... here goes.
.Firstly I am no authority and can accept no liability, but your request
for info' is as per a recent message which I sent to Paul Lowe recently so
I am copying it to you( assuming I can get my mind around this sending
copies on the Internet business!) What number is your kit ? (purely out of
interest)
Hope this information is of use to you. Just one point to remember is that
since the inside skin is over the insert, then when using the router you
must stop before the last , say 25 " 'thou' , of metal has been removed
otherwise you will cut into the surrounding innner skin. The last thin
piece of aluminium can be easily removed with a small compass instrument
type tool , and because of the lack of bonding it just pops out.. I was in
discussion with the factory about leaving this last piece of metal in and
bonding the new piece on top of it when I discovered how easy it was to
remove it .
I hope this info' is usefull and not too complicated to follow.
Regards
Bob Harrison. 337 G-PTAG
-----Original Message-----
From: Plantragg Developments [SMTP:ptag.dev@ukonline.co.uk]
Sent: 01 June 1999 11:41
Subject: RE: Wing Sockets
Hi! Paul Lowe.
I am unable to leave your cries for help anylonger, I really thought Europa
should not only assist you with replacement metal inserts but jollywell fix
it for you also. However at least I see that this is a problem that is not
peculiar just to me (337) and another I know of .
The factory suggested an implant alongside the misplaced inserts , which we
Engineering Section we have been given engineering 'easement'
to remove the whole existing insert and insisted on a replacement insert
which encompassed about 4"x3" with the increase in size being all forward
and downwards . We removed the existing plate by fixing a 'tuffnel'
template hole over the entire new area and used a wood router (very
controllable on depth)and removed the aluminium implant and foam in about
three depth cuts. What was also disturbing the offending implants were not
bonded to the inner skin probably due to the implant not being brushed over
with epoxy to enable it to be wet out ,inspite of being well abraded, the
'pre-preg' used on the vac'mold must be extremely lean. I think the seat
belt anchor inserts have the same problem since when I drilled mine the
inner skin has clearly moved from the insert.
I really think such things should be the subject of an authorised repair
scheme , not a modification , but the way this item has been addressed
leaves a lot to be desired . I know that the problem exists at least 236
units below mine , what number are you ? What those unfortunates who have
not noticed and buried
the problem are expected to do is beyond me, since the new aft wing sockets
could put one , if not two bolt holes in a position off the insert
altogether.
Regards
Bob Harrison (337) G-PTAG
-----Original Message-----
From::CONSTRUCTION_DESIGN_SERVICES@compuserve.com]
Sent: 01 June 1999 08:26
Subject: Wing Sockets
Hi There
Trying again for the third time, my emails seem to be getting cut short any
suggestions. I am trying this from another machine.
I am having to change three out of four of the ali plates in the fuselage
for the W27 and W26 wing sockets. The mod procedure is to remove the outer
skin locally and cut the existing plate to allow room for the new one. I
have done one by using a Dremel with cutting disc using a wet sponge on the
inside to keep it cool. Even so it still gets hot and I am afraid of
causing delamination of the glass. Also cutting the existing plate in situ
wuithout damaging the inner skin is a long arduous job. Has anyone found a
better method? It would seem to me removing the entire existing plate would
be easier rather than trying to cut it. Any suggestions?
Paul Lowe
If this hasnt come through I'll go back to using pigeons.
-----Original Message-----
From: TroyMaynor@aol.com [SMTP:TroyMaynor@aol.com]
Sent: 21 June 1999 14:56
Subject: Lift Pins
Hi Again,
I am about to start the dreaded task of lift pins and wing incident setup.
I
have two concerns. The first; how can I be absolutely sure I'm drilling the
holes for the pins straight? I know what the book shows but has anyone
found
a more precise way than the MK-I calibrated eyeball?
The second and more serious concern involves the rear attach hard points
for
the lift pin sockets. They are too far aft by an amount that puts the
center
of the socket dead even with the forward edge of the hardpoint. And the
forward edge of the hard point is even with the aft edge of the cockpit
module/fuselage bond line. I called Lakeland and was told that a few early
moldings were sent out that way and suggested adding an adjacent piece of
aluminum to it. This puts the added piece dead on the seam where the CM was
bonded to the fuselage. What is the best way to extend this plate forward
about an inch and half or so?
Troy Maynor-120
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