Jabiru J450, Руководство конструктора, Страница: 190 / 343

Jabiru J450 Constructors Manual
Pre-Paint>Wings>Test fit wings
Tuesday, April 6, 2010 190 of 343
Pre-Paint>Wings>Test fit wings
Objectives of this task:
To test fit the wings and flaps to the fuselage prior to painting. This task is intended purely to
make sure of the fit and to make any adjustments that may be required so that there will be no
issues during the final fit after the wings and fuselage have been painted.
Each wing will be held in place with 4 bolts in this task and no nuts will be used – this is
purely a test fit task after which the wings will be removed and prepared for painting.
In our factory we use 3 people for this task, so ask 2 friends over to help you.
Do
not try to do this task with less than 3 people or you risk dropping the wing.
While the wings are in place the strut to wing fairings will be fitted and the strut/main gear to
fuselage fairings will be pre-fitted and then removed for painting.
Equipment required
2x4” timber for wing support – see the 3 rd
page of this task for details
Preparation
Place 2 trestles beside the fuselage and lay the wing on them.
It is very important that the AN4-14A wing attach bolts fit snugly through the holes in the
attach bushes on the wing and the aluminium wing attach lugs on the fuselage. Test fit a bolt
in each hole, and if the bolt will not fit through to full depth then
very carefully ream the
holes with a hand reamer out until the bolts fit correctly.
It is also very important that the AN175-15A strut attach bolts fit snugly though the holes in
the strut attach lug under the wing, the lower fuselage mount and the top and bottom holes in
the strut itself. Test fit a bolt in each hole, and if the bolt will not fit through to full depth then
very carefully ream the holes with a hand reamer out until the bolts fit correctly.
Do not ream any more than is absolutely necessary to get a snug fit, and do not use a drill in
place of a reamer!
These are critical fit items and great care must be taken!
Using a sanding block, lightly sand both
sides of each wing attach lug and the upper
and lower strut mounts to clean any debris
away.
Fit the bottom of the strut to the lower
fuselage mount with an AN175-15A bolt.
Rest the outboard end of the strut against a
saw stool as shown at right.
Lay 2 AN4-14A wing attach bolts on top of
the fuselage where you can easily reach
them.
Now you are ready to test fit the wings.