Jabiru J450, Руководство конструктора, Страница: 191 / 343

Jabiru J450 Constructors Manual
Pre-Paint>Wings>Test fit wings
Tuesday, April 6, 2010 191 of 343
Test fit the wing
Because the precise alignment of the wing bolts is critical the bushes in the wing attach lugs
in the wing root that the bolts pass through are mounted in a bed of flock to allow for fine
adjustment during fitting.
The process that we use in our factory is to get the wing prepared and ready to fit, then heat
up the wing root bushes and fit the wing. Heating of the bushes is done by placing a soldering
iron in each bush as shown above and waiting until the other side of the bush is too hot to
touch comfortably. This gives 3 or 4 minutes working time, which is usually enough.
One person holds the outboard end of the wing while the other 2 hold the front and back of
the wing root. Walk the wing in to the fuselage and guide the wing attach lugs into the
aluminium wing attach brackets on the fuselage. The fit will be tight and it may take some
careful positioning of the wing to get them to fit – the outboard end of the wing may need to
be moved forward or backwards to get the correct alignment. As soon as one bolt can be fitted
though then do so and then that bolt can be used as a pivot to work the other lug into place.
The wing attach bolts are fed in from the front and back of the wing toward the centre of the
wing.
The fit of the bolts will be tight and you will have to tap the bolts into place using a soft
hammer and a brass drift/punch. Be careful and resist any temptation to tap the bolt too hard
but rather
gently encourage each bolt to pass through the bracket and the wing bush.
While the wing is being fitted the strut mount bush under the wing can be heated by the same
method so that it will be ready. Once both wing root bolts are in place the top of the strut can
be fitted to the strut mount and the wing is fitted.