Radio Equipment; Engine Recommendations; Additional Items Required; Hardware & Accessories - GREAT PLANES Extra 300S ARF Instruction Manual

Radio Equipment

The Extra 300S ARF can use a simple 4 to 6-channel radio
with several "Y" reversing and non-reversing harnesses or it
can use a 6 to 10-channel computer radio. Even though the
airplane flies fine with a simple radio, we strongly
recommend that a computer radio be installed as this will
make it easier to obtain the best performance of all flying
styles possible with the Extra 300S ARF. Also, all servos
used on this airplane should be capable of delivering at
least 60 oz-in of torque with the exception of the throttle
servo. Digital servos are highly recommended for 3D flying.
Note: Battery selection is also very important. The batteries
must be in good condition. To verify this, make sure you
cycle them several times before you fly the airplane and that
they reach their advertised capacity. If you use 60 oz-in
servos on your airplane, the minimum battery size
recommended is a 4-cell, 1200mAh battery. If you are using
digital servos on your airplane, a 4-cell, 2000mAh battery is
the minimum size recommended. Please make sure your
batteries are fully charged before each flight, and check and
recharge them if needed between flights. A Hobbico
Voltmeter MKIII (HCAP0356) works well for checking your
battery voltage. A Hobbico Quick Field Charger
will charge your batteries between flights.

Engine Recommendations

The recommended engine size range for the Extra 300S
ARF is 1.60 cu in to 2.10 cu in [25 to 35cc] 2-stroke, 2.00 cu
in to 3.00 cu in [33 to 50cc] 4-stroke or 2.5 cu in to 3.8 cu in
[41 to 65cc] Gas. Sport style flying will be possible with the
lower engine sizes recommended while 3D style flying will
require the larger sizes recommended. If an engine in the
upper end of the size range is used, throttle management
must be practiced. The larger size engines recommended
are for 3D style flying which means that the engine is
capable of producing several pounds of thrust more than
what the model weighs. Full throttle should only be used
during straight up maneuvers, never during straight and
level flying or while diving as this might over stress the
airplane. The airplane has been tested with engines within
the recommended range, including the upper end, and it
proved to be capable of handling all of them.
The Extra 300S ARF includes the hardware and
instructions necessary to install a glow type engine. If you
decide to install a gas engine you will need to supply your
own fuel tank and hardware necessary to install and run the
engine. You may also need to modify the fuel tank supports.
You must not install a larger engine than recommended
under any circumstances. Installing a larger engine than
recommended will void your warranty and will overstress
your airplane to the point where it may break in the air. The
airplane is designed and built so that it will fly well with
engines within the recommended range.
This is the list of hardware and accessories required to
finish the Extra 300S ARF. Stock numbers are provided in
parentheses.
Engine 1.60 cu in to 2.10 cu in [25 to 35cc] 2-stroke,
2.00 cu in to 3.00 cu in [33 to 50cc] 4-stroke, or 2.7 cu
in to 3.8 cu in [44 to 65cc] Gas
Suitable propellers (refer to the engine manufacturer's
recommendations)
Switch and charge jack mounting set (Great Planes-
GPMM1000) or (Ernst-ERNM3001)
R/C foam rubber (1/4"-HCAQ1000, or 1/2" HCAQ1050)
If you plan to use a non-computer radio you will
also need:
® Digital 4-Channel radio with seven servos for a glow engine
5-Channel radio with eight servos for a gas engine
™ (HCAM3000) (4) 12" Servo extension (ailerons, throttle, elevator,
rudder) (HCAM2100 Futaba
(2) "Y" harness (rudder, aileron) (HCAM2500)
(1) "Y" harness with servo reverser (elevator)
(FUTM4150)
If you plan to use a computer radio you will also need:
7-Channel Radio with seven servos for a glow engine
8-Channel Radio with eight servos for a gas engine.
(3) 12" Servo extension (ailerons, glow throttle) (HCAM2100)
(4) 24" Servo extensions (rudder, elevator) (HCAM2200)
(4) 6" Servo extensions (elevator, ailerons) (HCAM2200)
If you plan to use a glow engine you will also need:
3' Fuel tubing
Great Planes Aluminum Plug (GPMQ4166) or Great
Planes Easy Fueler
Pitts style muffler for your engine
If you plan to use a gas engine such as the Fuji
you will also need:
3' Gas fuel tubing (GPMQ4133)
Great Planes Aluminum Plug (GPMQ4166) or Great
Planes Easy Fueler Valve for gas (GPMQ4161)
Great Planes Ignition Switch Harness (GPMG2150)
36" Plastic pushrod (GPMQ3710)
2-56 x 30" Pushrod (GPMQ3716)
2 Threaded rods for plastic inner rod (GPMQ3831)
2 Plastic clevises (GPMQ3800)
(4) 1/4-20 x 2" Bolts
(4) 1/4-20 Blind nuts (GPMQ3332)
(4) 1/4" Flat washers
Gas tank for gasoline
4

ADDITIONAL ITEMS REQUIRED

Hardware & Accessories
™ Valve for glow (GPMQ4160)
)
®
™ BT 50,