Black Horse Model Extra 300S Owner's manual

SPECIFICATION
Made in Vietnam.
 Wingspan : 108 cm 43 in.
 Length : 100 cm 39.37 in.
 Weight : 0.85 kg 1.87 lbs.
Partslistingrequired(notincluded):
 Radio : 04 channel.
 Servo : 04 servos.
 Motor : AXI2814.12.
 Battery: 3 CELLS - LI - POLY - 11.1v - 2000 mA.h.
 Propeller : 12 x 3.8.
 Speed Control : 30A
INSTRUCTION MANUAL BOOK.

EXTRA 300S.
2
This instruction manual is designed to help you build a great flying aeroplane. Please read this
manual thoroughly before starting assembly of your EXTRA 300S. Use the parts listing below to
identify all parts.
WARNING.
Please be aware that this aeroplane is not a toy and if assembled or used incorrectly it is
capable of causing injury to people or property. WHEN YOU FLY THIS AEROPLANE YOU
ASSUME ALL RISK & RESPONSIBILITY.
If you are inexperienced with basic R/C flight we strongly recommend you contact your R/C supplier
and join your local R/C Model Flying Club. R/C Model Flying Clubs offer a variety of training
procedures designed to help the new pilot on his way to successful R/C flight. They will also be able
to advise on any insurance and safety regulations that may apply.
TOOLS & SUPPLIES NEEDED.
Thick cyanoacrylate glue.
30 minute epoxy.
5 minute epoxy.
Hand or electric drill.
Assorted drill bits.
Modelling knife.
Straight edge ruler.
2mm ball driver.
Phillips head screwdriver.
220 grit sandpaper.
90° square or builder’s triangle.
Wire cutters.
Masking tape & T-pins.
Thread-lock.
Paper towels.
Some more parts.
HARDWAREPACK
COWLING.
Landing gear.....
To avoid scratching your new airplane, do not
unwrap the pieces until they are needed for
assembly. Cover your workbench with an old
towel or brown paper , both to protect the
aircraft and to protect the table. Keep a couple
of jars or bowls handy to hold the small parts
after you open the bag.
Please trial fit all the parts. Make sure you have
the correct parts and that they fit and are
aligned properly before gluing! This will assure
proper assembly. EXTRA 300S ARF is hand
made from natural materials, every plane is
unique and minor adjustments may have to
be made. However , you should find the fit
superior and assembly simple.
The painted and plastic parts used in this kit
are fuel proof. However, they are not tolerant
of many harsh chemicals including the
following: paint thinner, C/A glue accelerator,
C/A glue debonder and acetone. Do not let
these chemicals come in contact with the
colors on the covering and the plastic parts.
PARTS LISTING.
FUSELAGE ASSEMBLY
(1) Fuselage.
WING ASSEMBLY
(1) Right wing half with pre-installed
aileron.
(1) Left wing half with pre-installed
aileron.
Tail section assembly
(1) Vertical stabilizer with pre-
installed rudder.
(1) Horizontal stabilizer with pre-
installed elevator halves.
SUGGESTION.
NOTE.

INSTRUCTIONMANUAL.
3
C/A glue.
C/A glue
C/A glue.
+ This is not a toy
+ Be sure that no other flyers are using your
radio frequency.
+The glow plug clip must be securely attached
to the glow plug.
+ Do not flip the propeller with your fingers.
+ Keep loose clothing and wires away from
the propeller.
+ Do not st art the motor if people are near .
Do not stand in line with the side of the propel-
ler.
SAFETY PRECAUTION.
INSTALLING THE AILERON SERVOS.
 1) Install the rubber grommets and brass
eyelets onto the aileron servo.
2) Install the metal connector onto servo
arm.
3) Turn the wing panel right side up. Using
a modeling knife, remove the covering at
possition show below.

EXTRA 300S.
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Remove the covering.
Bottom of wing .
4) Install the aileron servo as same as
picture.
1) Using a ruler & pen to draw a straight
line as below picture.
INSTALLINGTHEAILERONCONTROLHORN.
Repeat the procedure for the other
wing half.
5) Attach the micro control connector to
the servo arms. Be sure to use the lock tie but
it could free rotation.
Aileron control horn.
Servo wire.

INSTRUCTIONMANUAL.
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Aileron control horn.
 2) Insert aileron control horn to the aileron.
Aileron pushrod.
Cut.
Repeat the procedure for the other
wing half.
Remover the covering.
Control horn slot . Aileron pushrod wire.

EXTRA 300S.
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INSTALLING ELECTRIC MOTOR.
See pictures below:
Motor mount wood:
Push.
C/A glue.
3x10mm.
Secure.

INSTRUCTIONMANUAL.
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3) Slide the cowl back over the motor.
COWLING.
1) Slide the cowl over the motor and line
up the back edge of the cowl with the marks
you made on the fuselage.
2) While keeping the back edge of the
cowl flush with the marks, align the front of
the cowl with the crankshaft of the motor. The
front of the cowl should be positioned so the
crankshaft is in nearly the middle of the cowl
opening. Hold the cowl firmly in place using
pieces of masking tape.
3x10mm.
Secure the cowling.
INSTALLING THE SPINNER.
2x10mm.

EXTRA 300S.
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4) Drill 1,6mm pilot holes through the block
of wood for each of the mounting screws
provided with the servo.
3) Using a modeling knife, remove the
covering at servo tray and at fuselage slot.
Remove covering.
SERVO INSTALLATION.
1) Install the rubber grommets and brass
eyelets onto the rudder and elevator servo.
2) Install the metal connector onto servo
arm.
Repeat the procedure for the other
servo.
HORIZONTAL STABILIZER INSTALLA-
TION.
 1) Using a modeling knife, carefully re-
move the covering from over the vertical sta-
bilizer mounting slot in the top of the fuselage.
Remove covering.
2) Draw a center line onto the horizontal
stabilizer. Then slide the horizont al into the
fuselage.
Left size.
Right size.

INSTRUCTIONMANUAL.
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C/A glue.
 3) Slide the stabilizer into place in the pre-
cut slot in the rear of the fuselage. The stabi-
lizer should be pushed firmly against the front
of the slot.
Center line.
Bottom size.
Top size.

EXTRA 300S.
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6) When you are sure that everything is
aligned correctly, mix up a generous amount
of Flash 30 Minute Epoxy. Apply a thin layer to
the top and bottom of the stabilizer mounting
platform sides in the fuselage. Slide the
stabilizer in place and realign. Double check
all of your measurements once more before
the epoxy cures. Hold the stabilizer in place
with T-pins or masking tape and remove any
excess epoxy using a paper towel and rubbing
alcohol.
Attach C/A glue into hinge.
CONTROL HORN INSTALLATION.
Control horns as same as method of aileron
wing. See pictures below:
4) With the stabilizer held firmly in place,
use a pen and draw lines onto the stabilizer
where it and the fuselage sides meet. Do this
on both the right and left sides and top and
bottom of the stabilizer.
Bottom elevator
Top elevator
5) Remove the stabilizer. Using the lines
you just drew as a guide, carefully remove the
covering from between them using a model-
ing knife.
When cutting through the covering to re-
move it, cut with only enough pressure to only
cut through the covering itself. Cutting into
the balsa structure may weaken it.
Remover covering.
Elevator slot.
Elevator and rudder control horn.
Elevator and rudder pushrod wire.