Use scrap 1/16
th
balsa sheet to cover the foam at the flap root and the open portion of
the corresponding flap pocket. Sand flush with surface.
Hold the Flap/Aileron back into position on the wing with a scrap piece of 1/8
th
balsa
as a spacer between the Flap/Aileron and wing. Now sand the tip of the Aileron/Flap
flush with the tip of the wing.
Remove approximately 1/8
th
of an inch of material from the Flap/Aileron Tip and
install scrap 1/16 balsa as before.
Now when you hold the Flap/Aileron in position on the wing you should have a 1/8
th
inch gap next to the flap root and the same at the tip when the balsa wing tip is held in
place.
When the above is so, measure down the LE of the Flap/Aileron from the tip 16
inches. Make a mark perpendicular to the leading edge. This is the cut line.
Cut apart the Aileron and flap then square up the ends and add some scrap 1/16
th
balsa to finish the control surfaces. Make sure that you are satisfied with the fit of
these surfaces before hinging them.
Flight Surface Hinging and Control
Overview
The Hinges supplied in this kit are known to work great with this type of model. When
properly installed they will serve you well. Before final gluing they need to be flexed a
few times and it is a good idea to scuff them with 80 grit sand paper for better adhesion.
The location of the hinges on the surface is determined first by the number of hinges and
the length of the surface and especially where the control horn is placed.
We have found that by first determining the location and orientation of the servo, then
planning for the exact location for the control horn and its ¼ ply base, we can better plan
for the best location of the hinges. Once the location of the Horn base plate is installed a
hinge is placed on one side or the other as near as possible for maximum stiffness. From
there, the following horns can be placed in an even fashion.
NOTE: These steps are very important in cases such as the installation of the Flap and
elevator control runs. Both of these surfaces will need to have either reversed servos OR
(this is what we do) orient both servos the same direction such as both horns facing right.
When you place the servos in such a manner, the location and placement of the control
horn and thereby the Horn Base Plate will be in different locations relative to the control
surface they operate. Simply put: Plan the servo location and orientation first, then the
control horn, then the hinges. We have supplied 4 hinges per surface with the exception
of the flap, which receives 5.
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