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Section 3: Installing the Aileron Linkages
Parts Needed
• Wing panels (right and left)
• Short (3-3/4") threaded rod (both ends) (2)
• Clevis (4)
• 4/40 nuts (4)
• Clevis locks (4)
• Control horn (1 for each wing panel)
• Plastic plate (2)
• 2mm screws (4)
Step 1. Locate a 4/40 x 3 3/4" threaded rod, two 4-40 clevis,
two clevis locks and two nuts. You will also need a control horn,
plastic plate and two 2mm screws to mount the control horn to
the aileron control surface.
Step 2. Thread a 4-40 nut and clevis on each end of one of the
threaded rods.
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Tools and Adhesives Needed
• Medium Phillips screwdriver
• Drill
• Drill bit: 1/16"
• Felt-tipped pen or pencil
• Thin CA glue (optional)
Step 3. Before mounting the linkages, it's a good idea to center
the wing servos electrically. Connect them to the receiver (if
using a "y" harness use the aileron channel only). Note: If you
are using separate channels for the ailerons, check to make sure
you connect to the appropriate channels (refer to radio operating
instructions for diagram).
Turn on your transmitter, then the receiver. Once the servos have
moved to their electrical center, you can position each aileron
servo arm so that it will be approximately 90 degrees to the link-
age when attached.
Next, turn off the receiver, then the transmitter.
Step 4. To establish the length of the linkage required, trial fit
the control horn and linkage to the servo arm. Adjustments to
length are made by screwing one or both clevis in or out. Be
sure to securely tighten the 4-40 nuts against the clevis to pre-
vent the clevis from backing out. The control horn should be
positioned so the holes that the clevis connects to are over the
centerline of the hinge line of the control surface.
Note: For normal applications, the clevis is connected to that
portion of the servo arm that points to the wing tip
(see below).
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