Tony,
Often there is little precious room in the wing for poorly built (or
just factory assembled and glued up) aileron weights.
Many times I have to cut the top off the supplied boxes and flanges to
get the weight box to fit the customers (or factory NG assembled)
ailerons.
To be brief: you will fabricate a weight box as we did in the Classic
wing which was all foam (Reference page 8-14). The exercise above is
easy and often times fits the wing and aileron weights much more
accurately. When finished you will have a bit more sanding to do, but
it is worth it.
REMEMBER- Since the rear of the wing is cut out, what you are doing is
adding back in shear load structure.
One solution is to use foam of about 3/8 inch thick or more, on each
side of the mass balance arm hole and at the front. Lay 2-3 layers of
glass around the closeout. You may recess the foam an inch from the
opening and make a closeout as in the aileron. This recessed closeout
is a strong C section, but will require filling or it will look nasty.
Use more foam to fill the gap with a bit of expand cell and cover with 2
oz cloth for neatness.
Or as we did in the Classic, install the foam about 3/16 inch from the
aileron weight with rapid epoxy. Cut a generous flox corner at the
junction of the foam to top, bottom, and aft closeout skins. Be sure to
run the glass along the upper surface and butt it at the lower skins.
Let the glass hang past the skins a bit and peel ply. Trim after cure.
I prefer the latter as there is less filling, but in my opinion, the
former aileron style closeout is a stronger joint with the glass flat on
both the upper, lower and aft closeout. It takes another step to fill
and clean up as it is a big hole...
Cutting the wing open for essentially a close out of 4 plies is too hard
to recover from in time and money.
Congratulations on your purchase.
Study your build manual hard, ask questions and hone your skills.
You will be rewarded with a great aircraft.
Best Regards,
Bud Yerly
US Europa Dealer
----- Original Message -----
From: tonyvaccarella<mailto:tony@weimagine.com.au>
To: europa-list@matronics.com<mailto:europa-list@matronics.com>
Sent: Saturday, September 13, 2014 7:06 AM
Subject: Europa-List: Wing missing mass balance reassess
<tony@weimagine.com.au<mailto:tony@weimagine.com.au>>
Hello all,
I just joined this forum today - I live in Sydney Australia and have
recently got possession of a partially built Europa XS (tailwheel) from
the USA.
While taking stock of the equipment I noted that the aileron mass
balance reassesses that should have been installed prior to wing
close-out are missing.
Point here is that the wings are definitely closed - so before I even
begin, I need to sort out this problem. Has anyone come across this
before. Will I need to open the wind again (if that is possible) or can
I install the reassesses at this late stage.
Regards,
Tony Vaccarella
--------
Tony Vaccarella
Mascot NSW 2020
Sydney Australia
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