The aileron and flap servos
are preinstalled, as well as
the control horns and hinges.
The tip tanks can easily be
removed by loosening two
screws on each wing.
ensure that the alignment is correct.
Installing the wing panels is not
difficult, but be sure to place the rear
carbon-fiber spar into the fuselage
first. There are two carbon-fiber rods
included in the kit. One is short—
roughly 5 inches long—and the other
is approximately 9 inches long. The
9-inch carbon-fiber rod is the one used
during wing installation. The shorter rod
is used in the vertical fin installation.
The manual shows the rear spar in the
wing-assembly photo, but there are no
instructions for how to install it before
sliding the wings on.
After you have the rear carbon-fiber
spar installed in the fuselage, start to
slide the wing panel onto the rod.
Near the front of the wing panel is a
preinstalled, short carbon-fiber rod. This
rod will fit into the hole located in the
side of the fuselage.
Slide the wing panel on until it is
roughly 1 inch from the fuselage, then
carefully push the aileron and flap servo
wires into the fuselage. When the wires
are in, push the wing on the rest of the
way and secure it to the fuselage with
two of the supplied wing screws. Repeat
the process for the other wing panel.
The easiest way to install the tail
assembly is to screw the horizontal
stabilizer to the vertical stabilizer, then
glue the entire assembly to the fuselage.
The manual shows screwing the
horizontal stabilizer on afterward, but
the placement of the mounting screws
will make it difficult to easily thread
The horizontal stabilizer fits into a
molded bracket on the top of the fin and
is then secured with four small screws.
On the top of the vertical fin is a hole
in which the 5-inch carbon-fiber rod
is installed. The rod adds the required
stiffness to the vertical fin because this is
a T-tail aircraft.
Plug the elevator and rudder servo
leads into the extensions located in the
back of the fuselage. The extensions are
labeled so you do not get them mixed
up. The base of the vertical fin is then
epoxied into the fuselage. I found that
the slot in my fuselage was too wide and
the mating joint was loose, so I cut a
shim from 1/32 plywood to fill in the gap
and create a snugger fit.
Keep a careful watch on the alignment
of the tail assembly to the wings, making
sure that it is not slowly creeping to
one side or the other while the epoxy is
After the tail assembly is installed, the
next step is to attach the elevator and
rudder pushrods. The control horns are
preinstalled on the control surfaces so all
you have to do is thread the clevis and
pushrod together, and fit the pushrod
into the servo hole and the clevis to the
Plastic model cement was used to glue
the pitot tube to the front of the nose
cone. The nose cone attaches to the rest
of the fuselage with two preinstalled
magnets. The magnets allow the nose
to come off easily in the event of a
hard landing, or it can be used to make
storage and transportation to the flying
field more convenient. The magnets
could be a little stronger, so you might
want to install an extra one or use a few
dabs of Foam-Tac adhesive to help hold
In the stock configuration, you will
need a six-channel receiver. All of the
internal radio wiring was routed by the
manufacturer. The required Y harnesses
for the flaps and ailerons are preinstalled
and connected, including the harness for
the retracts and the rudder-to-nose-gear
The ends of the Y harnesses are clearly
labeled, so connecting them to your
receiver is as simple as matching the
labeled servo leads to the corresponding
channels on your brand of receiver.
The manual has a chart for high
and low rates and exponential settings
for all control surfaces. I chose to use
values in the middle of the listed range
as a starting point. Two degrees of up-elevator trim is shown as the neutral
elevator position. The manual also
recommends mixing some up-elevator
with flaps. Make sure your flaps deflect
equally when deployed.
I found that one flap servo had a
control horn that was not centered. I
took the servo cover off and adjusted
the servo control horn back to center.
Because they are on a Y harness, making
sure the control horns on the two flap
servos are parallel to each other will
ensure equal movement.
The recommended center of gravity
(CG) range with the gear down is
25mm to 32mm from the leading
51 Model Aviation MAY 2016