Specifications

20
Section 6: Flap Linkages
Required Parts
• Wing assembly • Control horn (2)
• Mounting screws (6) • Metal clevis (4)
• Clevis keeper (4) • 4-40 nuts (4)
• 4-40 x 1-1/2" threaded rod (2)
• #2 x 3/8” screws (6)
Required Tools and Adhesives
• Thin CA • Phillips screwdriver
• Drill Bit: 1/16", 5/64" • Drill
• Felt-tipped pen
Step 1
Prepare the flap linkage by placing the clevis keepers onto
the metal clevises. Thread a 4-40 nut onto each end of the
4-40 x 1-1/2" threaded rod. Thread a clevis onto each end
of the threaded rod. The threaded rod should just be
visible between the forks of the clevis.
Step 2
Attach the assembled linkage to the flap servo arm.
Step 3
Remove the back plate from the control horn using side
cutters or a sharp hobby knife. Use a 5/64" drill bit to drill
out the mounting holes in the control horn.
Step 4
Position the control horn on the flap by: Aligning the front
edge of the control horn 1/2" behind the trailing edge of
the wing and in-line with the flap control linkage. Use a
felt-tipped pen to transfer the mounting holes from the
control horn onto the flap.