Jabiru J450, Руководство конструктора

Страница: 192 / 343

Jabiru J450 Constructors Manual
Pre-Paint>Wings>Test fit wings
Tuesday, April 6, 2010 192 of 343
The important thing at this stage is to relieve the weight of the
wing while the flock cools and sets in the correctly aligned
position, and this is done by lifting the outboard end of the
wing up about 35mm from the resting position and supporting
it overnight.
We use a simple wooden support for this (pictured at right)
but an even simpler “T” shape of 2x4 timber cut to length
would be fine. Leave the wing undisturbed overnight and the
next day the support can be removed and the other wing fitted
in exactly the same way.
Once both wings and the flaps and strut fairings have all been
satisfactorily test fitted the wings can be removed and set
aside for painting.
Test fit the flaps
We use 2 people in the factory to carry out this step and we recommend that you do the same,
as the flap is too long for one person to handle comfortably and safely.
Flap fitting
Each flap post bolt hole has a short length of Bundy tube spacer fitted inside ( tip : a smear of
grease will hold the spacer in place while fitting) and each post fits into each flap hanger and
is held in place with an AN3 bolt.
Size the inboard end of the flap
The inboard end of each flap is manufactured slightly over length to allow for variations in
flap hanger placement and it will now require trimming to allow it to clear the fuselage at full
deflection.
Ideally the flap should clear the fuselage by a small amount, nominally 5mm, when at full
deflection. Full deflection in this case is defined as being 40° from the fully retracted position.
The first step is to hold the flap in place and check for overall length with the flap in the fully
retracted position, then manually lower the flap by hand in stages until the end of the flap
touches the side of the fuselage. Take care that you do not scratch the rear window.
Working in small stages, mark and trim the end of the flap until the flap can be lowered to the
full deflection position without touching the fuselage. In the factory we find that the use of a
marker pen held flat against the fuselage to mark the underside of the flap at each stage can be
quite useful. A jigsaw is used the trim the flap.
Remember that the top of the flap will not be trimmed quite as much as the bottom of the flap
due to the shape of the fuselage at this location.
Work slowly and in stages until the flaps clear the fuselage by 5mm at full deflection.
When you are satisfied that the inboard end of each flap is correctly cut and shaped, use a
long sanding block to smooth off the cut surfaces.