Dynaflite DYFA2018 - Manual (Page 20)

a tape measure to set the stabilizer tips equal
distance from the nose.
Q 3. Use 30-minute epoxy to glue the stabilizer
in position on the fuselage, rechecking the
alignment before the epoxy cures.
Q 4. Remove the covering from the bottom of
the fin. Test fit the fin onto the stabilizer. The
trailing edge of the fin should align with the
trailing edge of the stabilizer. When satisfied
with the fit, glue the fin to the stabilizer with
6-minute epoxy or aliphatic resin. Make sure
the fin is 90° to the stabilizer. Masking tape and
T-pins can be used to hold it in place.
Q 5. Starting with the elevators and stab, cut
the covering from the hinge slots.
The most common mistake made by modelers
when installing a CA type of hinge is not
applying a sufficient amount of glue to fully
secure the hinge over its entire surface area; or,
the hinge slots are very tight, restricting the
flow of CA to the back of the hinges.This results
in hinges that are only "tack glued"
approximately 1/8" to 1/4" into the hinge slots.
The following technique has been developed to
help ensure thorough and secure gluing.
D 6. It is best to leave a very slight hinge gap,
rather than closing it up tight, to help prevent
the CA from wicking along the hinge line. Make
sure the control surfaces will deflect to the
recommended throws without binding. If you
have cut your hinge slots too deep, the hinges
may slide in too far, leaving only a small portion
of the hinge in the control surface.To avoid this,
you may insert a small pin through the center of
each hinge before installing. This pin will keep
the hinge centered while you install the control
surfaces.
I—17. Install the hinges in the elevator and attach
the elevator to the stabilizer.
Q 8. Apply 6 drops of thin CA adhesive to both
sides of each hinge. Allow a few seconds
between drops for the CA to wick into the slot.
Q 9. Follow the same procedure to install the
rudder on the fin.
Q 10. Reinstall the control horns.
Q 11. Use aT-pin inserted through the tow hook
block from the inside of the fuselage to locate
the tow hook pilot holes.Thread a 4-40 nut onto
the tow hook. Then, thread the tow hook into
the tow hook block from the bottom of the
fuselage to the depth shown on the plan.
Ql 1. From the remaining 3/16" x 3/8" basswood
spar, cut three servo rails. The rails should be
snug against the fuselage sides, but not so tight
that they cause the fuselage sides to bow
outward.
Q Q 2. Slide the first servo rail into its slot in the
fuselage doubler. Slide it all the way forward
and glue it in place with thick CA. Slide the
second servo rail into place and then slide it all
the way aft. Do not glue it yet! Position one
of your servos in place and use it to position the
second servo rail. Do not push the rear servo
rail tight against the servo, but rather leave
about a 3/32" gap between the.servo "body"
and the servo rail. This will provide enough
room to install and remove the servos without
removing the rails. Glue the second servo rail in
place. Repeat the step for the second servo to
position and glue the third servo rail.
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