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Composite-ARF Yak 55 (2.1m/83")
the ends a bit for a perfect fit.
Rough up the fuselage sides before gluing the
complete assembly into place with 30 min.
epoxy, and then reinforce these important joints
with the glassfibre tape provided in the kit, and
24hr laminating epoxy (see photo).
Note: Fit the wings to the fuselage, and secure
with the M6 pl;astic nuts, before gluing in the
rudder servo mounting plate - so that you cannot
accidentally deform the fuselage.
Rough sand the top surface of a 25mm (1") Ø
metal output disc, and the bottom of the pheno-
lic rudder servo arm. Centre the servo using
your R/C and glue the phenolic horn in place
perpendicular to the servo sides, using 30
minute epoxy. Then remove the assembly and
secure the phenolic arm to the disc with the 3
small M2 bolts and nuts (included), in a similar
manner as for the aileron servo arms.
Make up the pull-pull wires for the rudder from
the hardware supplied, with a loop at the front
that goes over the hooks on the output arms,
and a quick-link with turnbuckle and locknut at
the rudder end. We cross the wires over in the
fuselage, as then the exit slots are further back -
and almost hidden under the stabs. For security
pass the closed loop cable
through the supplied 'crimping
tubes' 2 times before squash-
ing flat with large pliers. Make
sure that the wires are tight,
and check and re-tension
them after the first few flights
as the cables straighten out.
Even a small amount of slop
will prevent your Yak from per-
fect tracking.
With servo mounted in the
position shown, and the cables
crossed, the centre of the slots
(30mm x 3mm) for the pull-pull
cable exits need to be approx.
125mm (5") from the back of
the fin and 25mm (1") above
the bottom of the fuselage.
techsupport@composite-arf.com
(above) Rudder servo mount positioned to
suit heavy engine at top end of power range.
Secure the plate to the fuselage sides with
the glassfibre tape supplied, and slow epoxy.
(Below) Pull-pull cable exit slots suit rudder
servo positioned as above.
125mm
19
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