b) Mounting the Rudder Unit
Then install the rudder unit into the fuselage opening from the rear (figure 1a, item 2) and place it centrally on the
fuselage.
Measure the precise position of the rudder unit to the elevator (see figure 1b, bottom).
Important:
The accuracy of this work considerably influences the flight properties.
Use a soldering gun set to the lowest temperature if possible to remove the iron-on film. Removing the film
with a cutter knife is not recommended since the fibres of the wood tail unit are injured and thus may lead to
strength problems.
When everything is measured perfectly, use a pen to mark the precise position of the rudder unit at the outside of the
fuselage. Then pull it out of the fuselage again and remove the iron-on film carefully with a soldering gun within the
marks.
Then you can attach the rudder unit permanently to the fuselage with 30-minute epoxy glue. Align the rudder unit to
the fuselage as illustrated in figures 1a and 1b.
The rudder is attached to the rudder unit with two rudder hinges. The rudder hinge slots are pre-installed ex works.
Mark the positions of the rudder hinges before removing the rudder. Glue the rudder hinges to the rudder with super
glue first. Observe that the hinges do not protrude into the rudder too far.
Then glue the rudder to the rudder unit with super glue as well so that a gap of approx. 1 mm results.
c) Mounting the Rudder Horns to the Rudders and Elevators
Sketch the installation site of the rudder horn to the
rudder in a straight line from the linkage exit of the
rudder linkage.
Observe that the linkage rods for the rudder in the rear
area of the fuselage (viewed from the back in flight
direction) are guided out of the fuselage on the left
(figure 2, item 1).
Drill the corresponding hole with a matching drill (or
cutter knife). The rudder horn can now be glued on
with 5-minute epoxy resin glue as shown symbolically
6...2
in figure 6, item 2.
The elevator linkage is guided out of the right area
(viewed from behind in flight direction) of the rudder
linkage (figure 2, item 3).
Again, the installation site of the rudder horn must be determined according to a straight line from the slot to the
elevator and the rudder horn must be installed there (as shown for the rudder).
Finally, install one clevis each to the rudder linkages and clip them to the rudder horns.
30
Figure 2