QuiQue's Aircraft Semi Scale Yak-54 Assembly Manual - page 16
Rudder Horn, Servo and Pull/Pull Installation
Required Tools
FIG 1
• Xacto knife, #11 Blade
• Sealing
Iron
• Ruler
• Needle
Nose
Pliers
• Epoxy
• Sand
Paper
The Optional Du-bro package that we offer
will have everything you need to complete
the following steps, otherwise please use
your alternative.
Rudder Horn Installation
1. Locate holes in rudder, remove covering from each side
FIG 2
using an X-acto knife.
2. Seal edges using sealing iron.
3. Insert threaded rod into hole followed by base washers.
4. Thread aluminum nuts onto each side of rod.
5. Measure each side of the horn to make sure it is centered
in the rudder then tighten.
6. Attach Du-bro clevis to control arm then thread control arm
onto each side of rudder horn. FIG 1
Rudder Servo and Pull/Pull Cable Installation
1. Insert 4/40 threaded rod about 1/8” into Du-bro clevis.
FIG 2
2. We recommend using one JR 8711 servo to control the
Rudder.
FIG 3
3. Install rudder servo into tray using four screws supplied.
(be sure servo has been centered)
4. Locate carbon fiber servo arm for rudder, this arm will
be attached to a round arm that came with your servo. You
will need to sand each of these parts then glue them
together using epoxy. Before epoxy sets, drill and install
two 4/40 bolts. FIG 3
5. Insert 4/40 threaded rods into two ball links about 1/8”.
Install ball links to carbon fiber control arm. Be sure to use
blue loctite on these bolts. FIG 3
6. Locate both Pull/Pull cables and heat shrink tubing. Place
Tubing over one cable and shrink using a heat gun, this will
prevent cables from rubbing together and creating RF noise.
7. Slide one crimp onto cable then measure back from one
end of cable about 1.5” and bend cable using needle nose
pliers. Now measure back about ½” from end of cable and
bend again.
8. Slide Crimp into place over three cables and crimp flat
using a crimping tool or pliers. FIG 4
9. Pull/Pull cables will cross over one another in an “X” pattern.
FIG 4
Be sure to pull wires snug before crimping. Tighten wires by
adjusting threaded rods into ball links using pliers. Carbon
fiber control arm should remain centered while rudder is
centered.