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Jabiru J450 Constructors Manual
Pre-Paint>Wings>Cut aileron cable openings
Tuesday, April 6, 2010
168 of 343
Now look into the hole that you have just cut –
look for the black marks (arrowed at right) on
the rib that shows the location of the aileron
cable clamp bolt holes. Drill a second 38mm
hole as shown at right, slightly inboard of the
wing rib with the fore and aft alignment being
exactly in line with the aileron cable clamp
bolt holes. This hole will be used to access the
rear of the cable clamp bolts.
This completes the underwing work, now we
need to check the aileron cable slot marking on
the upper wing surface.
Check and cut the aileron cable exit slot
With the wing still upside down, lay a setsquare on the wing and use it to transfer the location
of the
outboard
side of the wing rib to the upper wing surface. Mark the rib location and then
turn the wing right side up.
It is critical that the aileron cable slot be accurately positioned in relation to the wing rib
because the aileron cable will be clamped to the wing rib and it must align with the aileron
drive arm. The aileron drive arm and thus the aileron is positioned in relation to the slot in the
later task
Pre-Paint>Wings>Fit ailerons
.
The marked slot should be slightly (~2mm) outboard of the wing rib. If that is not the case
then move the slot marking laterally until it is slightly outside of the wing rib. The fore and aft
position of the slot will be correct as marked and the overall slot dimension should be
approximately 15mm wide and 70mm long.
Once the location has been confirmed then cut the slot out: drill each end of the slot slightly
undersize and use a jigsaw the join the holes then widen to the marked size with a file.
If the aileron cable inspection hole on the underside of the wing has been correctly marked
then the aileron cable slot will usually be correct too, but it is still good practise to check
carefully before cutting – it is much better to check first and
then
cut.
This completes the
Pre-Paint>Wings>Cut aileron cable openings
task.