4
Radio Equipment
The Sukhoi SU-31 1.60 ARF requires a minimum 4-channel
radio system with a standard receiver.
Since the Sukhoi SU-31 1.60 ARF is a large model capable
of extreme aerobatics, standard servos should not be used to
operate the control surfaces. Servos with a minimum torque
rating of 98 oz-in [7.1kg-cm] are required except for the
throttle servo which may be operated by a standard servo.
The servos shown in this manual that are used for all of the
control surfaces are Futaba
®
S3305 servos. A minimum of
six high-torque servos and one standard servo (used for
throttle when installing a glow or gas engine) are needed to
complete the Sukhoi SU-31 1.60 ARF.
❏
Futaba S3305 Servo High-Torque Standard w/Metal
Gears (FUMT0045)
❏
Futaba S3003 Servo Standard (FUTM0031)
Because of heavy loads on the control surfaces, heavy duty
servo arms should be used on all of the control surface
servos. The throttle servo can use the servo arm supplied
with the servo. This manual shows the installation of Great
Planes 2" [51mm] aluminum single-sided servo arms. If the
rudder servos will be installed in the aft location, six arms will
be needed. If the rudder servos are installed in the forward
position, only four arms will be needed. See the building
instructions for details on the rudder servo positions.
❏
Great Planes Large Scale 2" Single Side Servo
Arm
(GPMM1110)
The following servo extensions and Y-harnesses were
also used to build the Sukhoi SU-31 1.60 ARF as shown in
the manual:
❏
(2) 36" [914mm] servo extensions for elevator servos
(HCAM2726 for Futaba J-connector)
❏
(2) 36" [914mm] servo extensions for rudder servos
when installed in the optional aft location (HCAM2726
for Futaba J-connector)
❏
(2) 24" [610mm] servo extensions for aileron servos
(HCAM2721 for Futaba J-connector)
❏
(2) 6" [152mm] servo extensions for rudder servos when
installed in the forward location (HCAM2701 for Futaba
J-connector)
❏
(1) 6" [152mm] servo extension for receiver battery pack
(HCAM2701 for Futaba J-connector)
❏
(1) 12" [305mm] servo extension for brushless ESC if
applicable (HCAM2711 for Futaba J-connector)
If using a radio system that does not support mixing
of the elevator, rudder, and aileron servos, the following
items will be required:
❏
(2) Hobbico
®
Pro
™
HD Y-Harnesses for rudder and aileron
servos (HCAM2751 for Futaba J-connector)
❏
(1) Reversing Y-Harness for elevator servos (EMOM0027
for Futaba J-connector)
Note: The list of servo extensions and Y-harnesses is based
on the equipment we used to setup the Sukhoi SU-31 1.60
ARF as detailed in the manual. The length or quantity may
vary depending on the actual equipment being used, radio
locations, etc.
A battery pack with a minimum of 1500mAh capacity should
also be used. When fl ying large models such as the Sukhoi
SU-31 1.60 ARF, ALWAYS check the battery condition before
each fl ight. If you are installing a gas engine with an electronic
ignition module, a separate battery pack (the EI pack does not
need to be high capacity) will also be required in addition to
the battery pack used to power the receiver and servos.
❏
Hobbico HydriMax™ 4.8V 3600mAh NiMH Flat Rx
U
(HCAM6333)
A heavy duty receiver switch and charge jack will also
be needed:
❏
Futaba Heavy Duty Switch Harness w/Charge
Cord
(FUTM4385)
❏
Ernst Charge Receptacle Futaba J FM (ERNM3001)
If installing a gas engine, an additional switch (standard
size) and charge jack will also be needed:
❏
Futaba SWH13 Switch Harness & Charge Cord Mini
J
(FUTM4370)
Engine Recommendations
The recommended engine size range for the Sukhoi SU-31
1.60 ARF is 1.6 to 1.8 cu in [26 to 30cc] two-stroke glow engine,
1.8 to 2.1 cu in [30–34cc] four-stroke glow engine, or 1.9 to 2.6
cu in [32 to 43cc] gasoline engine. We recommend either the
O.S.
®
1.60 FX glow engine (OSMG0661) or the Fuji-Imvac
™
BT-43 EI-2 43cc gasoline engine (FJIG0144). The Sukhoi
SU-31 1.60 ARF is also designed to accept a Great Planes
63-62-250kV RimFire
™
out-runner brushless motor. All
of these power systems will allow the Sukhoi SU-31 1.60
ARF to perform the 3D maneuvers it was designed for and
installations are covered in this manual.
Glow Engine Requirements
The only required accessory needed to install a glow engine
is a Pitts style muffl er. If using the O.S. 1.60 FX glow engine,
the order number for a Pitts style muffl er is Bisson O.S. 1.60
FX Pitts Muffl er (BISG4116).
Summary of Contents for GPMA1412
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