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Jabiru J450 Constructors Manual
Pre-Paint>Fuselage>Fit flap drive shaft bearing blocks
Tuesday, April 6, 2010 116 of 343
Pre-Paint>Fuselage>Fit flap drive shaft bearing blocks
Objectives of this task:
In this task you will position and flock the flap drive shaft bearing blocks to the inside of the
fuselage.
Note that the flap drive shaft will be fitted in the Post-Paint section: only the bearing blocks
will be fitted in this task.
Materials required:
Card # 16 „ Flaps’
Resin and flock
Prepare the drive shaft
The flap drive shaft is only used for bearing block alignment at this stage, so you will need to
remove all the fittings: one drive arm from each end and the lever arm from one end, until you
have just the bare tube. Note that there are actually 2 tubes, one inside the other: make sure
that both tubes are still together when this task is completed and the shaft is reassembled.
Position the bearing blocks
Place the drive shaft through the pre-drilled
¾” holes (circled) so that the shaft protrudes
an equal amount from each side of the
fuselage, then slip one bearing block on each
end with the screw holes to the top.
Level the top of the block, hold it firmly in
place and drill 2 x 3/16” holes through the
fuselage skin, using the bearing block as a
drilling jig as shown below right:
Mark the blocks to indicate which side of the
aircraft they fit to as well as an arrow
towards the front of the aircraft, then remove
the flap drive shaft and the bearing blocks.
Wax each end of the shaft – it will be used to
align the bearing blocks as you flock them
into place and the wax will prevent any flock
sticking to it.
Countersink the outside of the screw holes to
suit the Tinneman washers.