Top Flite TOPA0220 - Manual (Page 35)

❏ 10. Using the FLAP SERVO MOUNTING
TEMPLATE as a guide, mark the location of the
basswood rails for the flap servo on the top of rib W1
and both W2 ribs. Fit the servo rails in the wing. The
rails extend from one W2 rib, across both W1 ribs, to
the other W2 rib. It will be necessary to notch the W1
ribs for the rails. The bottom sheeting must also be
cut to fit the servo as it will extend below the
sheeting. The top of the servo arm should be 3/8"
[9.5mm] above the top sheeting. Use the side view of
the fuselage as a guide in positioning the rails.
❏ 11. Make a flap control rod from a nylon clevis,
clevis retainer and .074" x 6" [1.6 x 152mm] wire
threaded on one end. Install your flap servo on the
left side of the wing with the screws, grommets and
eyelets supplied with the servo. Install the flap joiner
in the flaps and fit the flaps to the wing. Connect the
joiner to the control rod you just made. With the flaps
centered and the servo arm at 90 degrees to the
servo, make a Z-bend in the control rod where it will
connect to the servo arm. Connect the control rod to
the servo arm. Note that the control rod is installed
into the top of the servo arm.
❏ 12. Position the wing on the fuselage and check
the clearance of the flap servo and linkage with the
other servos and linkages in the fuselage. There
should be adequate clearance with no conflicts
between any of the servos and their linkages. Make
any adjustments needed now while you can still see
the servos and linkages. You may need to shorten
the flap joiner arm.
❏ 13. Install 12" [305mm] servo wire extensions on
each aileron servo. Secure the connection with tape or
heat shrink tubing. Route the servo wires for each servo
through the wing ribs and out the flap servo area.
Note: For a neater installation, use short lengths of
fuel tubing to tie-wrap the servo wires together.
❏ 14. Sand any epoxy that seeped from the joint
between the panels on the top of the wing. Remove
the flap linkage. Sheet the top center section using a
piece of 1/16" x 3" x 24" [1.6 x 76 x 610mm] balsa in
the same manner that you sheeted the bottom
center section, going from one W3 rib across the
center W1 ribs to the other W3 rib. Cut the opening
for the flap servo close to the servo. Otherwise, the
opening will extend beyond the fuselage side.
FINAL CONSTRUCTION
MOUNT THE WING TO THE FUSELAGE
The following steps will be easier to do if you
remove the ailerons and flaps.
❏ 1. Measure the width of the fuselage at the leading
edge of the wing. It should be close to 3-1/8"
[79.4mm]. Mark the LE and TE of the wing on both
sides of the centerline exactly 1/2 this amount
(1-9/16" [39.7mm]). Do this on the top and bottom of
the wing.
Note: The photos in this section do not show the
flap servo.
❏ 2. Trial fit the wing to the fuselage, centering it
between the marks you just made. The wing should be
slightly shorter than the opening in the fuselage. When
the flaps are hinged to the wing, the flap joiner rod will
be located on the TE of the wing. Slide the wing forward
in the opening and see if there is room for the flap joiner.
You may need to sand the leading edge of the wing flat,
as shown on the plan, to get the proper spacing.
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