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DEHAVILLAND BEAVER 120 ARF
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PHASE 11 – INSTALLING RADIO
EQUIPMENT.
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STEP 11.1 - MOUNT THE RECEIVER,
BATTERY PACK AND SWITCH
Wrap the receiver and battery pack in RC Foam.
Install your receiver, switch harness, antenna and battery
pack into the cargo bay area.
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STEP 11.2 - TEST RADIO EQUIPMENT.
Test that all servos are working correctly and that the servos
are centered.
Turn off the radio equipment.
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PHASE 12 – SET UP AND
CHECK OUT.
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STEP 12.1 - BALANCE THE AIRCRAFT.
All components including engine, prop, cowl, radio etc
should be installed when checking the Center of Gravity
(CG) and the tank should be dry with no fuel.
The center of gravity is often referred to as the “CG” and is
the point at which an aircraft is balanced with as much
weight aft of the point as it has weight forward of the point.
The CG for this model is located at the forward edge of the
recessed section of the wing. The recessed section of the
wing has two wooden dowels protruding from its front and
lies immediately behind the second fuselage former when
the wing is installed on the fuselage.
Check that the CG is correct. If it is not, move your radio
receiver and battery pack first and recheck. If weight is
needed, apply the weight as far aft or as far forward as
possible to reduce overall weight required to get the CG
correctly positioned.
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STEP 12.2 - ADJUST CONTROL SUR-
FACE THROW LIMITS.
Note that throws are measured at the widest part of the
elevators and rudder.
Always confirm that the horns and clevises are securely
engaged with the control rods and servo arms after any
adjustment. .
Adjust the throw limits for the control surfaces to match
the following guidelines.
Elevators: Up ¾ in and down ¾ in.. Total movement 1-1/2
in. Make sure the elevators are aligned and move in the
same plane throughout the range of movement.
Rudder: Left 1 in. and right 1 in.. Total movement 2 in.
Ailerons: Up 2/3 in and down 2/3 in.. Total movement 1-1/
3 in.
Flaps: Down 30 degrees maximum.
Nose gear: As set at factory.
Incidence on Wing and Horizontal Stab: Factory set
Engine Thrust: 0 degrees up/down, 0 degrees right/left.
Some modelers may find that 1-3 degrees of right thrust
will assist with ground handling
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