
Jabiru J450 Constructors Manual
Pre-Paint>Fuselage>Underbody penetrations
Tuesday, April 6, 2010
21 of 343
Pre-Paint>Fuselage>Underbody penetrations
Objectives of this task:
To turn the fuselage upside down, make all the required penetrations and fit the fairings.
Materials required:
Epoxy resin and flock
Procedure
Roll the fuselage over carefully onto a padded surface– some old bedding material is ideal –
so that it is upside down and place a saw stool under the empennage so that the fuselage is
roughly level.
Measure the centre of the fuselage at the base of the firewall and mark that point, and then
mark the centreline with a builders chalk line: line up from the firewall centre and in line with
the existing ½” hole in the rear of the undercarriage well and flick the chalk line to mark the
centreline. The next page has details of all the measurements. Print it and take it with you.
Place a tape measure on the firewall
datum (hold it in place with masking tape)
and run it out to 2600mm and tape it in
place and then carefully mark the position
of each hole with a marker pen. Recheck
each mark and then drill each hole.
Note that the 22mm transponder hole is
optional depending on whether or not you
are fitting a transponder. If you plan to fit
a transponder at a later date then drill it
now and plug it until required.
Clean each hole carefully, removing any
burrs and rough edges.
Sand the base of each fairing and the area that it will be bonded to.
Mix a small batch of resin and coat the base of each fairing and the area
that it will be bonded to.
Place the small fairings over the three fuel drain holes and flock into
place with the open side facing the rear of the aircraft.
Locate the quick drain fairing by placing a
short length of 1 1/8” tube into the fuselage
hole and then slip the fairing over the tube
with the long side to the rear of the aircraft.
Angle the tube until it is at right angles to the
floor section and flock the fairing into place.
Secure with 2 self-tapping screws until the
flock is cured and remove the length of
aligning tube.
Front
Front
Front
Содержание J450
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