Jabiru J450, Руководство конструктора, Страница: 86 / 343

Jabiru J450 Constructors Manual
Pre-Paint>Fuselage>Empennage>Fit vertical tail fin
Tuesday, April 6, 2010 86 of 343
Prepare the vertical fin
Start by laying the vertical fin on its side and drilling out the
marked inspection hole on the left-hand side with a hole saw.
Turn the vertical fin over and cut out the marked slot for the
rudder cable: drill each end
of the slot then use a jigsaw
to join the two holes.
Remove any burrs – the
exact sizing of the hole and slot will be finalized once the
vertical fin has been fitted into place.
Using a round file, enlarge the static probe mount hole in the
top front of the vertical fin – it needs to be large enough to pass the static tube and draw wire
through easily. The finished hole size is not critical. Take care not to file through the pre-
installed drawstring: for this reason using a drill is not recommended. If fitting the optional
strobe to the top of the fin then you should fit the mounting base now: flock the base to the
forward top of the fin and screw in place.
Pull the static tube and the electrical cables through the fin
Lay the vertical fin beside the fuselage on trestles set
at the same height as the fin mounting stub. Lay the
strake across the mounting stub.
Locate the drawstrings inside the fin that will be used
for the electrical cables and the static tube. Tie a
length of wire to the static tube drawstring and pull it
through – the friction of the static tube being pulled
may cause a drawstring to break.
The static tube and the strobe cable (if fitted) run
through the front hole and the VHF antenna cable runs
through the rear hole as shown in the photo at right.
Tie the draw wire to the static tube and strobe cable (if fitted) and the drawstring to the VHF
antennae cable. The photos above show the recommended method: loop the draw wire or
string around the tube or cable to be pulled then tape the end of the draw wire or string so that
when it is pulled it will tighten the knot. Tape the end of the tube or cable to be pulled to
streamline it and avoid it catching on anything. Cloth tape is stronger than masking tape and is
recommended for this purpose.
Pull the static tube/strobe wiring and VHF cable up through the fin and out of their respective
holes, then tie a knot or tape a mixing stick across the end of each tube or cable at right angles
to prevent them slipping back inside the fin.