Instruction Manual book

Instruction Manual book
Item code BH33.
SPECIFICATION
 Wingspan :
 Length
:
 Weight
:
 Radio
:
 Servo
:
 Engine
:
1.560 mm
61.42 in.
1.360 mm
53.54 in.
3.2 kg
7.04 Lbs.
06 channels.
07 Servos+2 servos Retract (FUTABA,S3170G)
61 Cu.in
2 Stroke.
91 Cu.in
4 Stroke.
Made in Vietnam.
MUSTANG P51 - Item code: BH33 .
Instruction Manual
This instruction manual is designed to help you build a great flying aeroplane. Please read this
manual thoroughly before starting assembly of your MUSTANG P51. 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.
PARTS LISTING.
FUSELAGE ASSEMBLY

(1) Fuselage.
WING ASSEMBLY



(1) Right wing half with pre-installed
aileron.
(1) Left wing half with pre-installed
aileron.
Some more parts........
Tail section assembly


2
(1) Vertical stabilizer with preinstalled rudder.
(1) Horizontal stabilizer with preinstalled elevator halves.
Some more parts.
HARDWARE PACK
COWLING.
Landing gear.....
SUGGESTION.
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.
NOTE.
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. MUSTANG P51 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.
MUSTANG P51 - Item code: BH33 .
Caution: this model is not a toy!
If you are a beginner to this type of powered
model, please ask an experienced model flyer
for help and support. If you attempt to operate
the model without knowing what you are doing
you could easily injure yourself or somebody
else. Please keep your safety and well-being
in mind at all times.
Important: before you start construction
Even if you have already built a large number
of RC models please read right through these
instructions and check all the kit components
against the parts list. We have taken great
trouble to keep construction as simple as
possible, without making any compromises
in the area of safety.
Note regarding the film covering
Minor creases or bubbles may develop in the
film covering due to major fluctuations in
weather conditions (temperature, humidity
etc.); in rare cases you may even find a slight
warp in a component. These minor faults are
in the nature of film-covered built-up wooden
structures, and can easily be corrected using
a heat gun, as commonly used for modelling.
Creases:
Blow warm air over the area
and rub down with a soft
cloth.
Wing warp:
Hold the panel twisted
gently in the opposite
direction to the warp, and
apply warm air to remove
the creases from the
covering.
Instruction Manual
SAFETY PRECAUTION.
+ This is not a toy
+ Be sure that no other flyers are using your
radio frequency.
+ Do not smoke near fuel
+ Store fuel in a cool, dry place, away from
children and pets.
+ Wear safety glasses.
+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 start the engine if people are near.
Do not stand in line with the side of the propeller.
+ Make engine adjustments from behind the
propeller only. Do not reach around the spinning propeller.
D. Horizontal stabilizer.
A. Cowling.
B. Wing panel. E. Vertical stabilizer.
C. Fuselage.
F. Aluminium wing dihedralbrace.
G.Decal sheet
Caution! do not heat the film more than is
absolutely necessary. If the air or the iron is
too hot, the film may melt and holes may be
formed.
This model is highly pre-fabricated and can
be built in a very short time. However, the work
which you have to carry out is important and
must be done carefully. The model will only
be strong and fly well if you complete your
tasks competently - so please work slowly
and accurately.
When self-tapping screws have to be
screwed into wood, apply a little white
glue to prevent them shaking loose: just
squirt white glue into the hole and fit the
screw.
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MUSTANG P51 - Item code: BH33 .
Instruction Manual
1.Door mounting wheel.
2. Wheels.
3. Air retract main gear.
Temporary pin to
keep hinge centered.
4. Spinner
5. Plastic part of wing
6.Plastic - enginemount.
7. Fuel tank.
8.Tail gear set.
Assemble then apply drops of thin
C/A to center of hinge,on both sides.
INSTALLING THE AILERON SERVOS.
 1) Install the rubber grommets and brass
eyelets onto the aileron servos.
 2) Using a modeling knife, remove the covering at possition show below.
Bottom of wing.
Bottom of wing
Remove the covering.
Cut the covering
away from the slot.
 3) Using the thread as a guide and using
masking tape, tape the servo lead to the end
of the thread: carefully pull the thread out.
When you have pulled the servo lead out, remove the masking tape and the servo lead
from the thread.
 4) Drill 1,6mm pilot holes through the block
of wood for each of the four mounting screws
provided with the servo.
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MUSTANG P51 - Item code: BH33 .
Instruction Manual
Servo wire.
Aileron
servo tray
Thread.
Aileron Control horn
Remove covering
INSTALLING THE AILERON CONTROL HORN.
3mm x 40mm.
M3 lock nut.
Nilon control clasp.
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MUSTANG P51 - Item code: BH33 .
Instruction Manual
C/A glue
INSTALLING THE AILERON
LINKAGES.
Control
horn
6
 1. Working with the aileron linkage for
now, thread one clevis onto one of the
threaded wires.
 2. Attach the clevis to the outer hole in the
control horn.
 3. Plug the aileron servo into the receiver
and center the servo. Install the servo arm onto
the servo. The servo arm should be perpendicular to the servo and point toward the middle of the wing.
MUSTANG P51 - Item code: BH33 .
Instruction Manual
 4. Locate one nylon servo arm, and using
wire cutters,remove all but one of the arms.
Using a 2mm drill bit, enlarge the third hole
out from the center of the arm to accommodate the aileron pushrod wire.
 5. Using pliers, carefully make a 90 degree
bend down at the mark made. Cut off the excess wire, leaving about 4mm beyond the
bend.
M2 clevis.
M2 lock nut.
Snap keeper.
 6. Insert the 90 degree bend down through
the hole in the servo arm. Install one nylon
snap keeper over the wire to secure it to the
arm. Install the servo arm retaining screw and
remove the masking tape from the aileron.
Bend and cut
Aileron servo
Aileron
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MUSTANG P51 - Item code: BH33 .
Instruction Manual
INSTALLING THE FLAP SERVOS.
Remove covering
Flap servo
C/A glue
INSTALLING THE FLAP CONTROL HORN
Flap control horn
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MUSTANG P51 - Item code: BH33 .
Instruction Manual
INSTALLING RETRACTABLE
LANDING GEAR.
3x6mm.
3x6mm.
3x4mm.
3x15mm.
3x4mm.
5x35mm.
3x15mm.
Bottom of wing
Aileron servo
Flap servo
Aileron
Flap
Top of wing
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MUSTANG P51 - Item code: BH33 .
Instruction Manual
Mark point
and Drill a
hole 2mm.
secure.
5x35mm.
10
Secure
MUSTANG P51 - Item code: BH33 .
Instruction Manual
3x6mm
3x8mm
Secure
Drill a hole 3mm
Secure
Secure
Drill a hole 3mm
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MUSTANG P51 - Item code: BH33 .
Secure
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Instruction Manual
MUSTANG P51 - Item code: BH33 .
Instruction Manual
3x12mm
Secure
Cut
C/A glue
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MUSTANG P51 - Item code: BH33 .
Instruction Manual
INSTALLING THE ENGINE MOUNT.
See pictures below:
FUEL TANK.
INSTALLING THE ST OPPER ASSEMBLY
Drill a hole
4mm diameter
ENGINE MOUNT.
 1) The stopper has been pre-assembled
at the factory.
 2) Using a modeling knife, cut one length
of silicon fuel line (the length of silicon fuel line
is calculated by how the weighted clunk should
rest about 8mm away from the rear of the tank
and move freely inside the tank). Connect one
end of the line to the weighted clunk and the
other end to the nylon pick up tube in the stopper.
 3) Carefully bend the second nylon tube
up at a 45 degree angle (using a cigarette
lighter). This tube will be the vent tube to the
muffler.
 4) Carefully bend the third nylon tube down
at a 45 degree angle (using a cigarette lighter).
This tube will be vent tube to the fueling valve.
4 X 30mm
14
When the stopper assembly is installed in the
tank, the top of the vent tube should rest just
below the top surface of the tank. It should not
touch the top of the tank.
MUSTANG P51 - Item code: BH33 .
Instruction Manual
 8) Feed three lines through the fuel tank
compartment and through the pre-drilled hole
in the firewall. Pull the lines out from behind
the engine, while guiding the fuel tank into
place. Push the fuel tank as far forward as
possible, the front of the tank should just about
touch the back of the firewall.
Blow through one of the lines to ensure
the fuel lines have not become kinked inside
the fuel tank compartment. Air should flow
through easily.
 9) To secure the fuel tank in place, apply a
bead of silicon sealer to the forward area of
the tank, where it exits the fuselage behind the
engine mounting box and to the rear of the tank
at the forward bulkhead.
Vent tube
Fuel pick- up tube
Fuel fill tube
 5) Test fit the stopper assembly into the
tank. It may be necessary to remove some of
the flashing around the tank opening using
a modeling knife. If flashing is present, make
sure none of it falls into the tank.
 6) When satisfied with the alignment of
the stopper assembly tighten the 3mm x 20mm
machine screw until the rubber stopper expands and seals the tank opening. Do not over
tighten the assembly as this could cause the
tank to split.
Do not secure the tank into place permanently until after balancing the airplane. You
may need to remove the tank to mount the
battery in the fuel tank compartment
 7) Using a modeling knife, cut 3 lengths of
fuel line 150mm long. Connect 2 lines to the 2
vent tubes and 1 line to the fuel pickup tube in
the stopper.
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MUSTANG P51 - Item code: BH33 .
Instruction Manual
120mm.
Fuel tank
Mark point
4x 30mm
Pushrod wire.
INSTALLING THE ENGINE.
Locate the long piece of wire used for the
throttle pushrod. One end of the wire has been
pre-bend in to a “Z” bend at the factory. This
“Z” bend should be inserted into the throttle
arm of the engine when the engine is fitted onto
the engine mount. Fit the engine to the engine
mount using the screws provided.
16
Pushrod wire.
MUSTANG P51 - Item code: BH33 .
Instruction Manual
Right side
Trim and cut
Right side
Trim and cut
Bottom side
Left side
Right side
COWLING.
 1) Slide the fiberglass cowl over the engine and line up the back edge of the cowl with
the marks you made on the fuselage.
Bottom side
3 x 10mm
Machine screw
Right side
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MUSTANG P51 - Item code: BH33 .
Instruction Manual
Secure
Left side
 2) While keeping the back edge of the
cowl flush with the marks, align the front of
the cowl with the crankshaft of the engine. 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.
Secure
 3) Slide the cowl back over the engine
and secure it in place using four wood screws.
See picture below.
 4) Install the muffler and muffler extension
onto the engine and make the cutout in the
cowl for muffler clearance. Connect the fuel
and pressure lines to the carburetor, muffler
and fuel filler valve.
INSTALLING THE FUSELAGE
SERVOS.
Tie wrap.
Preview
d
Rudder pushro
rod
Elevator push
INSTALLING THE SPINNER.
Install the spinner backplate, propeller and
spinner cone. The spinner cone is held in
place using two 3mm x 8mm machine screws.
18
Tie wrap.
MUSTANG P51 - Item code: BH33 .
Recever
Instruction Manual
Cut the covering
away from the slot.
Temporary pin to
keep hinge centered.
Assemble then apply drops of thin
C/A to center of hinge,on both sides.
 1) Using a modeling knife, cut away the
covering from the fuselage for the stabilizer
and remove it.
HORIZONTAL STABILIZER INSTALLATION.
Horizontal stabilizer installation.
See picture below.
Remove covering.
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MUSTANG P51 - Item code: BH33 .
Instruction Manual
Remove covering.
Remove covering.
 2) Draw a center line onto the horizontal
stabilizer. Then put the horizontal into the fuselage.
Bottom side
center line
Top elevator
 3) Mark the shape of the vertical on the left
and right sides onto the horizontal stabilizer
using a left-tip pen.
Mark point
Bottom side.
 4) Remove the stabilizer. Using the lines
you just drew as a guide, carefully remove the
covering from between them using a modeling
knife.
When cutting through the covering to remove it, cut with only enough pressure to only
cut through the covering it’s self. Cutting into
the balsa structure may weaken it. This could
lead to possible failure during flight.
20
Check to mark sure the wing and stabilizer are paralell. If they are not, lightly sand
the opening in the fuselage for the stabilizer
until the stabilizer is paralell to the wing.
MUSTANG P51 - Item code: BH33 .
Instruction Manual
ELEVATOR CONTROL HORN INST ALLATION.
Epoxy glue
Elevator control horn install as same as the
way of aileron control horn. Please see pictures below.
3mm x 40mm.
 5) When you are sure that everything is
aligned correctly, mix up a generous amount
of 30 minute epoxy. Apply a thin layer to the
top and bottom of the stabilizer mounting area
and to the stabilizer mounting platform sides
in the fuselage. Slide the stabilizer in place and
re-align. Double check all of your measurements one more time before the epoxy cures.
Remove any excess epoxy using a paper
towel and rubbing alcohol and hold the stabilizer in place with T-pins or masking tape.
Nilon control
clasp.
M3 lock nut.
Control horn of elevator (1set).
C/A glue
Remove covering
C/A glue
 6. After the epoxy has fully cured, re-
move the masking tape or T-pins used to
hold the stabilizer in place and carefully inspect the glue joints. Use more epoxy to fill
in any gaps that may exits that were not
filled previously and clean up the excess using a paper towel and rubbing alcohol.
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MUSTANG P51 - Item code: BH33 .
Instruction Manual
Elevator
cotrol horn
Elevator
cotrol horn
ELEVATOR PUSHROD INST ALLATION.
 Elevator pushrod install as same as the way
of aileron pushrod.
CIA glue
Top side
Elevator
pushrod
Elevator
pushrod
CIA glue
Bottom side
Sec
ure
22
Instruction Manual
er
keep
Snap
MUSTANG P51 - Item code: BH33 .
Cut
VERTICAL STABILIZER.
MOUNTING THE TAIL WHEEL BRACKET.
E
tor
leva
serv
o
Hinge.
 1) Put the rudder into the fuselage as same
as picture below.
 2) Mark the shape of the vertical on the left
and right sides of the rudder using a left-tip
pen.
Bend and
cut after
Elevator pushrod
Mark line
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MUSTANG P51 - Item code: BH33 .
Instruction Manual
 3. Now, remove the rudder and using a
modeling knife, carefully cut just inside the
marked lines and remove the film of the rudder. Just as you did with the horizontal stabilizer, make sure you only press hard enough
to cut the film, not the balsa rudder.
 Also carefully remove the covering from
below the lines as you drew as same picture
below.
Remove covering
Epoxy glue
Remove covering
Top side
Epoxy glue
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MUSTANG P51 - Item code: BH33 .
Instruction Manual
Assemble then apply drops of thin
C/A to center of hinge,on both sides.
Epoxy glue
 4. Put the vertical stabilizer back in
place. Using a triangle, check to ensure
that the vertical stabilizer is aligned 90 degree to the horizontal stabilizer.
 5) Using a modeling knife, cut away the
covering from the end of fuselage for the rudder hinge.
C/A glue
Inst alling CA Hinges for the
Rudder
Cut the covering
away from the slot.
Temporary pin to
keep hinge centered.
C/A glue
 6) When you are sure that everything is a
aligned correctly, mix up a generous amount
of 30 minute epoxy. Apply a thin layer to the
slot in the mounting platform and to the vertical stabilizer mounting area. Apply epoxy to
the lower rudder hinge. Set the stabilizer in
place and re-align. Double check all of your
measurements once more before the epoxy
cures. Remove any excess epoxy using a
paper towel and rubbing alcohol and hold the
stabilizer in place with T-pins or masking tape.
Allow the epoxy to fully cure before proceeding.
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MUSTANG P51 - Item code: BH33 .
Instruction Manual
CONTROL HORN - PUSHROD INSTALLATION.
 Rudder control horn install as same as the
way of aileron control horn. Please see pictures below.
3 x 50mm.
M3 lock nut.
Nilon control clasp.
Rudder
control horn
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MUSTANG P51 - Item code: BH33 .
Remove covering
Instruction Manual
d
ro
sh
u
rp
de
d
Ru
Slot of the rudder pushrod
rod
sh
pu
r
e
dd
Ru
3 x 12mm
Bottom of fuselage
Pu
sh
do
wn
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MUSTANG P51 - Item code: BH33 .
Instruction Manual
Rudder
control horn
M2 clevis
M3 lock nut
Rudder pusrod
Secure
Rudder pushrod
Bend and
cut after
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MUSTANG P51 - Item code: BH33 .
Instruction Manual
sh
Pu
Snap keeper
Rudder servo
C/A glue
Elevator servo
Elevator
pushrod
Elevator
pushrod
Rudder
pushrod
Secure
Rudder
pushrod
Elevator
pushrod
Elevator pushrod
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MUSTANG P51 - Item code: BH33 .
Instruction Manual
PUSHROD THROTTLE SERVO
INSTALLATION.
 Install adjustable servo connector in the
servo arm.
Cut
After installing the adjustable metal connector apply a small drop of thin C/A to the
bottom nut. This will prevent the connector from
loosening during flight.
INSTALLING THE SWITCH.
1) Cut out the switch hole using a modeling
knife. Use a 2mm drill bit and drill out the two
mounting holes through the fuselage side.
 2) Secure the switch in place using the
two machine screws provided with the radio
system.
Throttle servo
Remove covering
Throttle pushrod
30
Secure
MUSTANG P51 - Item code: BH33 .
Instruction Manual
INSTALLING THE RECEIVERAND BATTERY.
Mark point
 1) Plug the servo leads and the switch
lead into the receiver. You may want to plug
an aileron extension into the receiver to make
plugging in the aileron servo lead easier
when you are installing the wing . Plug the
battery pack lead into the switch.
 2) Wrap the receiver and battery pack in
the protective foam to protect them from vibration. Use a rubber band or masking tape to
hold the foam in place.
 3. Position the battery pack and receiver
behind the fuel tank. Use two tie wraps to hold
the battery and receiver securely in place as
pictures below
Switch
Do not permanently secure the receiver and
battery until after balancing the model.
4) Using a 2mm drill bit, drill a hole
through the side of the fuselage, near the receiver, for the antenna to exit.
Tie wrap.
Receiver
RETRACTABLE SERVO INSTALLATION.
JOINING THE WING HALVES.
 1) Location the aluminium wing dihedral
brace.
Retract servo
 2) Test fit the dihedral brace into each wing
haft. The brace should slide in easily. If not,
use 220 grit sand down the edges and ends
of the brace until it fits properly.
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MUSTANG P51 - Item code: BH33 .
Instruction Manual
WING ATTACHMENT.
See picture wing attach to fuselage.
Right wing
Wing bolt
Left wing
Wing bolt
 Installing the canopy as same as picture
below.
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MUSTANG P51 - Item code: BH33 .
Instruction Manual
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.
 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.
Secure
the
canopy frame.
*If possible, first attempt to balance the model
by changing the position of the receiver battery and receiver. If you are unable to obtain
good balance by doing so, then it will be necessary to add weight to the nose or tail to
achieve the proper balance point.
135mm
BALANCING.
 1) It is critical that your airplane be balanced correctly. Improper balance will cause
your plane to lose control and crash.
THE CENTER OF GRAVITY IS LOCATED
135MM BACK FROM THE LEADING EDGE
OF THE WING, AT THE FUSELAGE.
2) Mount the wing to the fuselage. Using a
couple of pieces of masking tape, place them
on the top side of the wing 135 mm back from
the leading edge, at the fuselage sides.
 3. Turn the airplane upside down. Place
your fingers on the masking tape and carefully lift the plane .
Accurately mark the balance point on the top
of the wing on both sides of the fuselage. The
balance point is located 135mm 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 smoothness 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 .
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MUSTANG P51 - Item code: BH33 .
CONTROL THROWS.
 1) We highly recommend setting up a
plane using the control throws listed.
 2) The control throws should be measured at the widest point of each control surface.
 3) Check to be sure the control surfaces
move in the correct directions.
Ailerons : 10mm up 10mm down
Flap
:
25mm down
Elevator :
8mm up
8mm down
Rudder : 30mm right 30mm left
Aileron control
10mm
10mm
25mm
Flap control
8mm
8mm
Elevator control
30mm
30mm
Rudder control
PRE-FLIGHT CHECK.
1) Completely charge your transmitter and
receiver batteries before your first day of flying.
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 many safe and enjoyable
flights with your MUSTANG P51.
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Instruction Manual