Aileron horns and pushrod are basically the same as in
elevator halves.
Horns are from balsa-CF composite and they are glued to control
surfaces with Cascol PU glue.
Pushrods are 4 mm CF tube with 2 mm treaded steel ends glued with
Super Epoxy. There are ball links in both ends to minimize slop.
I will use Futaba S9101 servos as I have them. I do not have
special low profile wing servos so I had to lay servos on side.
It may surprise someone but the horn setup shown in the picture
does produce very equal deflection on both sides with absolutely
no differential.
I will program differential with the transmitter if it is needed.
It is alot easier to do that way.
The horns are as long as reasonably feasible to reduce slop and
decrease both slop and actuating forces. That helps to get
accurate feel.
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Aileron horns cut of from balsa-CF plate. |
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Horns already in place. |
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The same from another angle. |
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Servo is mounted on a detachable plywood shelf. There
is a plywood plate glued directly on foam
with expanding PU glue. The shelf is bolted on this
plywood plate. With decent lightening holes the shelf
and plate weigh 8 g and the pushrod with end 3 g. Note
that servo side is flush with wing surface.
It would be relative easy to add a balancing weight if
necessary. |
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I might consider a transparent cover to show off a
bit. We'll see. |
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Aileron fully deflected. Even though the horn is
leaning forward there is no differential at all. Also the
servo
horn is leaning forward in neutral position. This is
needed because aileron horn is 43 mm and servo horn
16.5 mm long. If you are using a wing or any other servo
in upright position be sure to install aileron in
90 degrees angle with the plane where servo horn moves.. |
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Servo lying in its cavity. I will not put any balsa
on the sides as that does not bring any value to the
installation
I will only paint it with a paint that does not attack
foam. Balsa sheeting is 1 mm reinforced with thin fiber
glass.
The bottom plate is glued on foam and sits there very
firmly. |
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