3
Tail
Horizontal stabilizer first:
Screw the stab on the mount. Position the assembly carefully on the boom, so that the stab lower surface is
parallel to the boom upper surface. CA drop in place. When satisfied, use more middle density CA. Or, you can
use epoxy to install the stab. It provides you with some more time for the correct alignment.
BE SURE
to drill the mount and to secure the mount on the boom with thread (Kevlar or similar). CA soak.
Vertical stabilizer:
Join the fin and the boom. The fin should be perpendicular to the stab. Secure with epoxy. Be sure the fin is
mounted exactly in the directional axis of the model. Secure the fin with ca 30x25 mm patches of fiberglass (both
sides).
CA in place the horn.
Final assembly
Screw the wing to the fuselage. Push the boom/tail group assembly on the pod and use the thin CA glue
NOW
,
while checking for correct position of the tail in respect to the wing. Secure the seam with epoxy bead all around.
Drill a hole and install a 1,5 mm carbon peg through.
Install the servos in fuselage. Connect the rudder and elevator horns to the servo arms.
Use the micro pushrods consisting of Teflon tubing and steel inner part. The terminals can be done from Z (servo
arm) and L (horns) - shaped piano wire 0,8 mm, joined to the steel wire with piece of heat shrinking tubing and thin
CA. The pushrods must be run on the outer boom surface and attached at few posts with CA or adhesive tape.
The outlet of the pushrods from the pod is under the wing TE. The stab can be fully detachable. It is also easier to
mount the servos side by side.
Aileron servos:
Check that the servos you are going to use are in good condition, without play. The servo replacement is time-
taking job.
Open carefully the servo cables outlet in the wing bottom center. If necessary, extend the aileron cables. Cut-off
the servo flanges. Run the servo cables through the channels in wing. Push the aileron servos into the openings in
the wing, glue in place with silicone glue and secure with adhesive tape.
Install the horns in the ailerons: The horns must protrude throughout the aileron. Make up epoxy fillets in all four
corners, so that the aileron is “clamped” in between!!!
Connect the horns with servo arms. The link from servo to aileron must be made
without any play
, otherwise the
ailerons can flutter during the launch.
Recommended method: make the pushrods from 2 mm soft steel of aluminum wire. Bend about 4-5 mm of its end
in right angle and make M2 thread. Run M2 tap into the appropriate hole in the servo arm. Screw the rod directly
into the servo arm. Shorten the rod to appropriate length; make M2 thread and screw the clevis on. This way, the
perfect connection without any play is achieved.
The extension cable between wing exit connector and receiver can consist of 4-wires only, which divide into two
plugs to be pushed into the receiver. For example:
1. + and left aileron servo signal
2. – and right aileron servo signal
A single 4-pole connector is used for the servos to extension lead connection:
1. + both servos
2. – both servos
3. left aileron servo signal
4. right aileron servo signal
