control surfaces to a 45 degree angle on both sides and
check to insure there is plenty of travel.
You can wait to hinge all the surfaces until after you finish
covering the plane. Be sure to mark where each surface is
installed.
You can cover the airplane at this time using your preferred
method.
There are a few different methods for hinging the flaps. We
have used CA hinges attached to the bottom of the wing and
flap. We have also installed wood blocks on the top of the
flap and used hinge points to connect the flap with the wing.
You can use external control horns by cutting a slot in the
servo cover or you can keep the connections internal by cut-
ting a small hole in the trailing edge and attaching a small
control horn to the top of the flap.
In order to keep the flap from warping, you will probably need
to fiberglass it using .50 or .75 cloth on both sides of the flap.
If you decide not to fiberglass the flap and do have a small
warp (3/8” or less) it won’t affect the flight characteristics
other than requiring a few clicks of trim on the initial flight.
If your flap is warped before assembly, spray with water and
stack a couple books or magazines on it. Let the flap sit for 2
days.
Wrap your fuel tank in foam and install it in the firewall box.
Use some scrap ply to secure it in place. connect the fuel
tubing to your engine/muffler.
Use scrap 1/8” plywood to create servo rails. They can be at-
tached with servo screws to the 3/8” maple blocks on each
side of the fuselage. The above photo shows a single eleva-
tor servo and rudder servo on an electric setup. If you are
using a glow motor, you can place three servos in the tray
accordingly.
Thread the clevises into the control rods. Center all servos
and connect the control surfaces.
Fit the servo covers in place and drill 1/16” holes on the laser
marked locations. Remove the covers and reinforce the
holes with thin CA. Use #2 wood screws to attach the covers.
Connect your other control surfaces as shown.
