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.
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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.

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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.

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PUSHROD INSTALLATION.
Pushrod install as same as method of ai-
leron wing. See pictures below: Elevator pushrod.
VERTICALSTABILIZERINSTALLATION.
 1) Using a modeling knife, carefully re-
move the covering from over the precut hinge
slot cut into the lower rear portion of the fuse-
lage. This slot accepts the lower rudder hinge.
Remove covering.
Cut
C/ A glue.
Insert elevator control horn to the eleva-
tor.
I
Installing the elevator pushrod.

EXTRA 300S.
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When cutting through the covering to
remove it, cut with only enough pressure
to only cut through the covering itself. Cutting
into the balsa structure may weaken it.
 4) Remove the stabilizer. Using a mod-
eling knife, remove the covering from below
the lines you drew. Also remove the covering
from the bottom edge of the stabilizer and the
bottom and top edges of the filler block. Leave
the covering in place on the sides of the filler
block.
 3) While holding the vertical stabilizer
firmly in place, use a pen and draw a line on
each side of the vertical stabilizer where it
meets the top of the fuselage.
 2) Slide the vertical stabilizer into the slot
in the top of the fuselage. The rear edge of
the stabilizer should be flush with the rear edge
of the fuselage and the lower rudder hinge
should engage the precut hinge slot in the
lower fuselage. The bottom edge of the stabi-
lizer should also be firmly pushed against the
top of the horizontal stabilizer.
Remove covering
Hinge slot.
Remove covering.
Pen.
C/A glue.
C/A glue.

INSTRUCTIONMANUAL.
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3) 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 vertical fin mounting
platform sides in the fuselage. Slide the vertical
fin in place and realign. Double check all of
your measurements once more before the
epoxy cures. Hold the vertical fin in place with
T-pins or masking t ape and remove any
excess epoxy using a paper towel and rubbing
alcohol.
 5) Slide the vertical stabilizer back in
place. Using a triangle, check to ensure that
the vertical stabilizer is aligned 90º to the hori-
zontal stabilizer.
90º
Vertical
Stabilizer.
Horizontal
Stabilizer.
C/A glue.
See pictures below:
MOUNTING THE TAIL WHEEL BRACKET.
Nilon clasp.
Tail gear.
Made the slot from the bottom of the rudder:
Remove covering.
Control horn slot.
install the tail gear.
Installing the rudder pushrod:

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Elevator pushrod Rudder pushrod.
Cut
Parts required the full set of the landing gear:
LANDING GEAR INSTALLATION.
2x10mm
Wood collar.
Cut and drill the wheel pant:
Dill 2.0mm hole.
Attach the landing gear ,wheel p ant, collar,
wheel and secure them:
C/A glue.

INSTRUCTIONMANUAL.
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Cut
C/A glue.
C/A glue.
Prepare the plastic plate:
Repeat the process for the other wheel:
C/A glue.
2) The landing gear wire is held in place
using two nylon landing gear straps and four
wood screws.
1) Using the two landing gear straps as a
guide, mark the locations of the four mount-
ing screws onto the fuselage surface.
2 x 10 mm.
Strap.

EXTRA 300S.
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ATTACHMENT WING-FUSELAGE.
See pictures below:
aluminium wing dihedral brace.
Remove the covering from
the both side of the fuselage.
Install the wing Joiner:
Remove the covering.
Dihedral brace.
Prepare wing bolt for securing the wing and
fuselage:

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Battery stray.
Push.
INSTALLING THE BATTERY.
See pictures below:
Push.
Rubber band.
Receiver.
Wing bolt.

EXTRA 300S.
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Scecure the canopy frame.
Install canopy frame to the fuselage:

1) It is critical that your airplane be bal-
anced correctly. Improper balance will cause
your plane to lose control and crash.
THE CENTER OF GRA VITY IS LOCA TED
75mm BACK FROM THE LEADING EDGE OF
THE WING.

2) Mount the wing to the fuselage. Using a
couple of pieces of masking tape, place them
on the top side of the wing 75 mm back from
the leading edge, at the fuselage sides.

3. Turn the airplane up side down. Place
your fingers on the masking tape and care-
fully lift the plane .
Accurately mark the balance point on the top
of the wing on both sides of the fuselage. The
balance point is locate 75mm back from the
leading edge. This is the balance point at which
your model should balance for your first flights.
Later, you may wish to experiment by shifting
the balance up to 10mm forward or back to
change the flying characteristics. Moving the
balance forward may improve the smooth-
ness and arrow- like tracking, but it may then
require more speed for take off and make it
more difficult to slow down for landing. Moving
the balance aft makes the model more agile
with a lighter and snappier ”feel”. In any case,
please start at the location we recommend .
With the wing attached to the fuselage, all
parts of the model installed ( ready to fly), and
empty fuel tanks, hold the model at the
marked balance point with the stabilizer level.
Lift the model. If the tail drops when you
lift, the model is “tail heavy” and you must add
weigh* to the nose. If the nose drops, it is “nose
heavy” and you must add weight* to the tail to
balance.
*If possible, first attempt to balance the model
by changing the position of the receiver bat-
tery and receiver. If you are unable to obtain
good balance by doing so, then it will be nec-
essary to add weight to the nose or tail to
achieve the proper balance point.
BALANCING.

INSTRUCTIONMANUAL.
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CG
75mm 
1. Completely charge your transmitter and
receiver batteries before your first day of fly-
ing.
 2. Check every bolt and every glue joint in
your plane to ensure that everything is tight
and well bonded.
 3. Double check the balance of the
airplane.
 4. Check the control surface.
 5. Check the receiver antenna . It should
be fully extended and not coiled up inside the
fuselage.
 6. Properly balance the propeller.
We wish you enjoy.
PRE-FLIGHT CHECK.
 1. We highly recommend setting up a plane
using the control throws listed.
 2. The control throws should be meas-
ured at the widest point of each control sur-
face.
 3. Check to be sure the control surfaces
move in the correct directions.
CONTROL THROWS.
Ailerons : 15mm up 15mm down
Elevator : 15mm up 15mm down
Rudder : 20mm right 20mm left
Ailerons Control