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Jabiru J450 Constructors Manual
Pre-Paint>Fuselage>Fit cowling
Tuesday, April 6, 2010
111 of 343
Pre-fit the cowl hinges
You will need some Clecoes for this step. The objective is
to position and pre-fit the hinges using the Clecoes and then
flock and rivet the hinges permanently into place.
Lay both hinge pairs side by side on the bench. The hinge
with the first loop at the very end will be the bottom hinge.
Mark the “Top” and “Bottom” part of each hinge pair and
then mark each pair “Left” or “Right”. Mark and drill 3/32”
holes along the centre of each hinge starting at 10mm in
from the end and then at 100mm centres.
Assemble each hinge pair by sliding the long hinge pin through the full length of the hinge.
Note that the hinge pin is much longer than the hinge – do
not
trim the hinge pin to length!
The extra length will be used when the hinge pin is fitted through from the door jamb and into
the hinge later in this step. Put a cloth tape flag on the exposed end of the hinge pin to prevent
possible accidents.
Fit both cowls together, fitting the locating section
at the front of both cowls first and then butt the
side joins together. Tape the cowls together with
cloth tape on both the inside and outside of the
joins. Now roll the cowl so that one side join is on
the bottom and place the appropriate hinge
assembly 30mm in from the back edge of the
cowl. Take care that the hinge is placed so that the
hinge pin is exactly in line with the join and with
the side of the hinge marked “Bottom” in the
bottom cowl.
Hold the hinge firmly in place and drill a single
3/32” hole through the cowl at the back end of the
bottom hinge and fix the hinge in place with a
Clecoe.
Now align the front of the bottom hinge, drill and
Clecoe into place. Repeat the process on the top
hinge then drill and Clecoe every other hole. Drill
the remaining holes though the cowl.
Roll the cowl around to the
other join and repeat the entire
process for the other hinge.
At this stage the hinges hold
both cowls together as shown at
right, with Clecoes fixing the
hinges to the cowls.
Mark each hinge and the cowl
half that it belongs to and then
remove the Clecoes and the
hinge pins.
30mm