Pilots can expect to spend a mere
hour or two assembling the large foam
pieces of this Giant Scale PNP kit.
The Potenza 33-gram digital metal gear servos are used on all of the flight control surfaces except
for the flaps. They feature 60 ounces of torque at 5 volts.
is smartly finished in an authentic red
and white Cessna 170 scheme. A pair
of retro-looking, chrome-finished cowl
grilles allows cooling air to enter the
fuselage and is augmented by a set of
scooped, plastic exhaust ducts located
on the fuselage’s underside. The result
is a guaranteed supply of vital cooling
airflow through the fuselage to help keep
the power system components from
overheating in flight.
This unique airframe has rows of
vortex generators almost everywhere
you look! They are not just limited to
the LEs of the wing halves; they are also
molded into the vertical and horizontal
The foam cowl is removable, thanks
to cleverly concealed fasteners that can
be accessed through the cowl grilles
with a long-shaft screwdriver. With
the cockpit hatch removed, pilots
have easy access to the Cessna’s huge
interior. The battery tray is long enough
that whatever battery packs a pilot
chooses to use can be easily positioned
to obtain the optimal center of gravity.
Another large, removable hatch,
situated directly atop the Aura AFCS
control system, allows ample access to
the rear innards of the fuselage and the
rudder and elevator servos. Pilots will like
that Flex Innovations uses CA hinges on
all of the control surfaces. Some pilots,
however, might not be comfortable with
the plastic clevises on the pushrods that
connect to the flight control surfaces.
Flex Innovations includes a 28-page,
black and white, photo-illustrated
assembly manual with this model.
It is also available online in a digital
format. Single-sheet instructions are also
included for the Hobbywing 80-amp
ESC and 8-amp SBEC.
In a departure from the current
trend to include several languages in
the assembly manual, the 170’s is only
written in English. The assembly manual
is supplemented by a dynamic and sure
to be ever-evolving wiki page, located
on the Flex Innovations website and
dedicated specifically to this model.
The assembly manual contains a
wealth of useful information, including a
transmitter setup guide, a matrix of the
rates and exponentials preprogrammed
into the Aura AFCS, and information
that will help pilots connect their
receiver of choice to the Aura AFCS.
The Aura can auto-detect and connect
to almost any data-linked receiver
currently on the market, including
Futaba S.Bus, Graupner HOTT, Jeti
UDI, JR XBus, and Spektrum SRXL.
Going this route makes for a clutter-free
receiver wiring setup. Another clean and
easy option is to plug a pair of Spektrum
DSMX remotes directly into the Aura
Pilots can also use a more-traditional
pulse-width modulation receiver, but
doing so will require sourcing several
male-to-male servo leads and other
miscellaneous servo leads in order to
make the necessary connections between
the Aura and receiver.
The Flex Innovations website offers
the required cabling, as well as a full
selection of spare parts for this model,
should a pilot need to replace airframe
components or electronics.
Assembling the big 170 can be done
quickly. Flex Innovations even includes a
Photos by the author
60 Model Aviation DECEMBER 2016 www.ModelAviation.com