Jabiru J450 Constructors Manual
Pre-Paint>Wings>Mount flaps
Tuesday, April 6, 2010
171 of 343
Pre-Paint>Wings>Mount flaps
Objectives of this task:
In this task each flap will be positioned and the flap brackets will be glassed onto the wing.
The flaps are designed to stow in the flap
recess at the rear of the wing with the front
upper surface of the flap fitting snugly under
the lip at the top of the flap recess as shown
arrowed
in the drawing at right.
In order to achieve an aerodynamic fit the
top rear of the wing must be carefully
prepared before the flap can be positioned
and the flap brackets glassed into place.
Flap mounting is a
critical
issue that can affect the aerodynamic efficiency of the wing as well
as general flight characteristics and considerable care must be taken with this task.
This is probably the single most important task in the Manual!
Materials required:
Card # J16
‘Electric Flaps’
Glass fibre cloth bag labelled „
Hollow Wing
‟, Epoxy resin and flock
Prepare the wing
Turn the wing upside down and pack under the trailing edge so that the wing is stable.
There are 4 squares of peel cloth under the gel coat at the trailing edge of the wing where the
flap brackets will be located – carefully cut one corner then lift and remove the peel cloth
from each area then lightly sand the area under the peel cloth.
The rear of the wing as supplied should be a uniform distance
back from the rear of the flap recess. The photo at right
shows the workshop tool that we use to check the depth and a
line (in black, near the edge) that has just been marked.
If your wings have a black line like this marked along the
rear of the underside of the wing then you should trim
carefully to that line before starting on the next step.
Note that the wing is upside down in all photos in this task.