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Flap Servos: Following the aileron
servo procedure, prepare the flap linkages the
same way and also install the servos using the
supplied hex cap self tapping screws. You
should use a short metal servo arm with 1" /
25mm. Use the strongest servo you can get, we
recommend 35-40 kg torque. It is important to
understand that the servo is to be load free
when the flap is fully deflected. That means, you
set the flap angle when fully deflected by
adjusting the length of the linkage only, because
your servo arm will be exactly in-line with the
linkage. You will not be able to adjust this
deflection angle later with your transmitter. Set
your full flap extension angle to 50-60 degrees,
check the exact travel deflection at the aileron
root, where you can measure properly-this
should be 11 cm (4 1/2") Ensure both wings
match.
Once set, slide a piece of the included 5x1 mm
carbon tube over the all-thread, finalize its
length and then finish installing the linkage. Do
the same for both wings.
You can prepare for servo lead extensions now
or later.
Gear Door Servos: Here, too, the (metal) servo
arm should be 1" / 25 mm. Follow the same
principle as on the flap servo. When the gear
door is closed, the servo arm should be exactly
in line with the linkage.
The gear door is already factory-installed in the
wing. Since the gear door servo is set up to be
load free when the gear door is closed, allow
some tension on the linkage, some pressure on
the gear door, to hold it closed. Install the 25 kg
torque gear door servo with the linkage, which
also does need the carbon tube over the all
thread. Don't omit it, or the linkage will bend.
The servo horn should turn towards the wing
tube when moving, to give enough clearance to
the wheel and strut at all times. Use M3 ball
links at both ends of the linkage.
When the servos are set up correctly and the
radio is switched off, the doors are mechanically
locked and cannot be opened, unless you push
the linkage with one finger towards the wing
tube. When the gear is down, you can grab
through the slot of the open strut door, or when
the wing is off the fuselage, the gear is retracted
and all doors are closed, you can grab through
the hole in the root rib. In both cases it is easy to
unlock the gear door by pushing the linkage
towards the wing tube (forward), which unlocks
the door and then allows to fully open it by
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