Jabiru J450, Руководство конструктора, Страница: 151 / 343

Jabiru J450 Constructors Manual
Pre-Paint>Fuselage>Fit windows
Tuesday, April 6, 2010 151 of 343
Prepare the window
Remove the window carefully and clean and blow away any dust and debris from the joggle.
Place the window face down on the bubble wrap packing
material, taking care not to allow anything to scratch the
surface, and carefully sand around the entire
inside edge with
emery tape – sand only to a point just short of the inside of the
joggle, level with the centre of the ¼” foam strip.
By holding the emery tape as shown you can use your finger
to control the width of the sanded area.
When the sanding is complete blow away the dust and then
use a clean soft cloth and wipe right around the window.
Do not use any cleaning agents on the window.
Fit the window
Close and latch the door, wax the self-tapping screws and cable clamps and then wash and dry
your hands to prevent wax from getting onto the window or the joggle.
Mix a batch of resin and coat the joggle, then add flock to the resin and fill the entire joggle
out to the level of the foam strip. Carefully place the window into the bed of flock - start at
one corner and position the window until the alignment is correct and it fits inside the joggle -
and then gently press it into position.
Once the window is positioned correctly, take the self-tapping
screws and cable clamps and start fitting them around the door
frame as shown at right, working from the corners first and
then the middle screws and so on.
The clamps will pull the window into the joggle level with the
door frame and the wax will allow easy removal once the
flock has cured, while the screw holes will be filled during the
Paint Preparation tasks. Take care not to over tighten the
screws, tighten them just enough so that the edge of the
window is level with the adjacent door frame.
Check all around to see that the flock has keyed to the window: the sanded surface of the
window edge will appear to go clear with no bubbles when the flock is in full contact with it.
It may be necessary to gently squeeze the window to remove any bubbles, although if you
have filled the joggle with flock there should be full contact anyway.
When you are satisfied that the window is positioned correctly wipe away the excess flock
with a clean mixing stick, taking care not to smear any resin or flock over the window: always
wipe out and away from the window. Refer to the photo of a completed window on the
previous page for an example of how it should look. Leave overnight to cure. Next day
remove the screws and cable clamps.
The same process should be used for all the remaining windows. You may do more than one
window at a time if you are confident of your ability to do so but we would suggest that one
window at a time is a great way to start.
This completes the Pre-Paint>Fuselage>Fit windows task.