Mount Strut And Test Retract Motion; Assemble Pull-Pull Steering - Sapac Viper Jet MKII Composite Assembly Manual

Mount Strut and Test Retract
Motion
Required Parts
o o o o
Fuselage [F]
o o o o
Nose Wheel [T]
o o o o
Nose Gear Strut
Required Tools and Adhesives
® ® ® ®
Pliers
® ® ® ® Hex Wrench
® ® ® ® Hack Saw or Rotary Cutter
® ® ® ®
Thread Locking Compound
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As with the main retracts, the nose gear retract
unit can be installed with either the fixed gear
strut or by bending the strut provided with the
retract unit to shape. The images demonstrate
the installation using the strut provided with the
fixed gear.
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Trim and bend the nose gear strut to the
desired geometry. When cutting the strut, make
the nose wheel as tall as possible; this will
create a level attitude on the ground and will
help the plane rotate during takeoff.
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Mount the nose wheel to the strut using thread
locking compound on the set screw in the collet.
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Test the retract motion until you achieve the
desired geometry. Don't permanently attach the
strut to the retract unit, as you will need to
remove the strut and the steering arm to set up
the steering linkage.
Viper Jet MKII Composite
§ Nose Gear, Retractable (Optional)

Assemble Pull-Pull Steering

Required Parts
o o o o
Fuselage [F]
o o o o
Pull-Pull System Cables and Crimps
Required Tools and Adhesives
® ® ® ® Ruler
® ® ® ® Needle Nose Pliers
® ® ® ®
Crimping Pliers
® ® ® ®
Thin CA Adhesive
® ® ® ®
Screwdriver
® ® ® ®
Hex Wrench
® ® ® ® Thread Locking Compound
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Before installing the pull-pull steering test the
direction the servo will steer the nose gear. If
you find that the nose gear steers in the correct
direction use straight steering cables. If you find
that the nose gear steers opposite of the rudder
then you can cross your steering wires to
overcome this situation.
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Use a short ruler to measure the distance
between the nose wheel steering arm and the
servo arm. All you need is a rough estimate at
this time; you will adjust the cable length later.
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Cut two lengths of steering cable two to three
inches longer than the measured distance.
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Remove the steering arm and the servo arm and
assemble the pull-pull setup on your workbench.
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At each node you will want use the following
procedure:
1.- Feed the cable through the crimp.
2.- Feed the cable through the arm.
3.- Feed the cable back through the crimp.
4.- Loop the cable around and feed it back
through the crimp sleeve in the same direction
(see image for detail).
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