T-27 Tucano 20cc 1.2 2022
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The model airplane has structural reinforcements of high rigidity for installation of the ailerons, flaps,
elevators and rudder controls control horns. These points measure 30mm x 30mm (1,18 x 1,18 inches), are
positioned in strategic locations and must be identified according to the instructions below. If you want to
modify or adapt equipment that requires modifications to the original design, never do this on your own. Please
contact Juniaer through our service channels to check on the possibility of installation.
All horns must be heavy duty and suitable for 1/7 to 1/8 scale model aircraft or for 20cc scale model aircraft.
All servo arms must be heavy duty and suitable for 1/7 to 1/8 scale model aircraft or for 20cc scale model
aircraft. All linkage must be steel, with thread and diameter 2-56 or greater. All servo links and connectors must
be heavy duty and suitable for 1/7 to 1/8 scale model aircraft or for 20cc scale model aircraft.
We offer (sold separately) the sets of custom fiberglass horns for the T-27 Tucano 20cc Juniaer, in standard
version (single horns). To install it is necessary to make a slot with a sharp knife or drill with a 1mm drill so that
the horns are inserted inside the rigid points of reinforcement up to their bases. After obtaining the correct fit,
apply 30 to 40 minutes epoxy glue for permanent fixation. The connection point of the horns with the links must
be centered with the hinge line of the control surfaces.
Ailerons:
2 simple horns with a height between 15mm to 20 mm are required. The servo arms (length between
20mm to 25mm (1”) from the center to the end) must be positioned to the side of the wing root. Note that the
two sides of the wing have the same position. The horn reinforcement is centered with the line formed by the
slot where the servo arm is exposed. Distance between the center of the control arm and the hole of the horn
(in neutral position): 84mm. The servos must be screwed directly to the ribs inside the wing, which are
previously drilled. Before definitively screwing the servos, apply a drop of medium CA glue or epoxy glue to each
hole. It is necessary to open a slot in the servo compartment cover to pass the servo arms as shown in the
photos. To fix the servo compartment cover, apply a drop of medium CA glue or 5-minute epoxy glue in each
hole for better fixation and resistance to vibration. Recommended deflection: Between 10mm (low rate) to
15mm (high rate)
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up and down. To measure the deflection, place a ruler at the end of the control surface and
move it.
Flaps:
2 simple horns with height between 15mm to 20mm are required. The servo arms (length between 20mm
to 25mm (1”) from the center to the end) must be positioned to the side of the wing root on on
e side and to
the wing tip on the other side, as well as shipped from the factory. The horn reinforcement is centered with the
line formed by the frieze where the servo arm is exposed. Distance between the center of the control arm and
the hole of the horn (in neutral position): 79mm . The servos must be screwed directly into the ribs inside the
wing, which are previously drilled. Before definitively screwing the servos, apply a drop of medium or epoxy CA
glue to each hole. It is necessary to open a frieze in the lids of the servo boxes to pass the servo arms as shown
in the photos. To fix the servo box lids, apply a drop of medium CA glue or 5 minutes epoxy glue in each hole
for better fixation and resistance to vibration. Recommended deflection: Between 0º to 10º for takeoff and
between 25º to 30º for landing. To measure deflection, place a protractor on the leading edge of the flap and
move it.
To pass the servo extensions inside the wing, position it with the tip upwards and insert a thread with a
weight tied at the end through the aileron servo box, passing through the hole in the wing spar to the leading
edge until exit through the front hole of the wing root. Connect the extensions to the servos (aileron and flap)
and lock the connectors so that they do not come loose in any situation. Tie the end of the aileron servo
extension to the end of the thread in the aileron servo box and carefully pull the connector to the wing root.
Attach the outer tip of the extension to the root of the wing with adhesive tape. Repeat the same process for
the flap servo extension. Repeat the same process for the other half of the wing.
