Jabiru J450, Руководство конструктора, Страница: 279 / 343

Jabiru J450 Constructors Manual
Post-Paint>Wings>Install aileron cables
Tuesday, April 6, 2010 279 of 343
Post-Paint>Wings>Install aileron cables
Objectives of this task:
To install the aileron cables in the wings. The cable is tied to a pre-installed drawstring and
carefully drawn through the wing ribs. This task requires two people: one person to pull the
drawstring and a helper to feed the cable into the wing.
Place the cable
The labelled end of the cable is the end that goes inside the cabin, so the unlabelled end is the
end that goes out through the wing to the aileron. The cable may be fed from either the wing
root or the aileron cable inspection hole. This task will describe feeding from the wing root.
Fit a rod end to the unlabelled end of the cable – the rounded end will aid the passage of the
cable through the high-density foam ribs – and push the inner cable all the way in towards the
labelled end of the cable. This will make the pulled end of the cable shorter and thus it will be
more flexible to follow the curved path inside the wing (refer to the second photo below).
There is a drawstring inside in the wing with extra string coiled around a stick at the aileron
end that will be visible through the aileron cable inspection opening. Loosen the drawstring
and check that it can be moved freely, then pull a short length out of the wing root (circled
above) and tie it firmly through the rod end. Wrap cloth tape around the cable end from the
rod end all the way back to the outer cable: this will ease the cable through the wing ribs.
The aileron cable runs in front of the
spar and then curves around through
the spar and emerges at the aileron
drive arm position as shown at right
(photo taken during wing
manufacture).
Have your helper feed the cable into
the wing while you pull gently on the
drawstring through the aileron cable
inspection opening. Work slowly and
do not apply too much pressure but
rather move the cable carefully and
shake it if it seems to catch at any time.
It will help if your helper can slowly rotate the outer cable while you ease the cable around
the curve at the outboard end of the wing. Do
not pull strongly on the drawstring: if you do
you will only succeed in cutting the string into the foam ribs and wedging the cable, which
will make it extremely difficult to complete the task.
Feed the cable through the wing until it can be pulled through the aileron cable inspection
opening, then discard the cloth tape and string and remove the rod end. Push the cable back
into the aileron cable inspection opening and pull the end of it out of the aileron cable slot in
the upper surface of the wing.