Black Horse Model Mustang P51 Owner's manual

SPECIFICATION


Wingspan : 1.560 mm 61.42 in.


Length : 1.360 mm 53.54 in.


Weight : 3.2 kg 7.04 Lbs.


Radio : 06 channels.


Servo : 07 Servos+2 servos Retract (HITEC HS-75BB)


Engine : 61 Cu.in 2 Stroke.
91 Cu.in 4 Stroke.
Instruction Manual book
MadeinVietnam.
Item code BH33.

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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.
IfyouareinexperiencedwithbasicR/CflightwestronglyrecommendyoucontactyourR/Csupplier
and join your local R/C Model Flying Club. R/C Model Flying Clubs offer a variety of training
proceduresdesignedtohelpthenew pilotonhiswaytosuccessfulR/C flight.Theywillalsobeable
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.
Modellingknife.
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.
Landinggear.....
Toavoid scratching yournewairplane,donot
unwrap the pieces until they are needed for
assembly. Cover your workbench with an old
towel or brown paper, both to protect the air-
craftand toprotectthetable.Keepacoupleof
jars or bowls handy to hold the small parts af-
ter you open the bag.
Pleasetrialfitall theparts. Makesureyouhave
the correct parts and that they fit and are
alignedproperly beforegluing!Thiswill assure
properassembly.MUSTANG P51 ARFishand
made from natural materials, every plane is
unique and minor adjustments may have to
be made. However, you should find the fit su-
perior 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 follow-
ing:paintthinner,C/Aglueaccelerator,C/Aglue
debonderandacetone.Donotletthesechemi-
cals 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.
Some more parts........
Tail section assembly
(1) Vertical stabilizer with pre-
installedrudder.
(1) Horizontal stabilizer with pre-
installedelevator halves.
SUGGESTION.
NOTE.

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MUSTANG P51 - Item code: BH33 . Instruction Manual
+ 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.
+Theglowplug clipmust besecurelyattached
to the glow plug.
+ Do not flip the propeller with your fingers.
+ Keep loose clothing and wires away from
thepropeller.
+ Do not start the engine if people are near.
Donotstandinlinewiththesideof thepropel-
ler.
+ Make engine adjustments from behind the
propeller only. Do not reach around the spin-
ningpropeller.
SAFETY PRECAUTION.
Caution: this model is not a toy!
If you are a beginner to this type of powered
model,please askan experiencedmodelflyer
forhelpandsupport.Ifyouattempttooperate
themodel withoutknowingwhat youaredoing
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
Evenifyou havealreadybuilt alarge number
ofRCmodelspleaseread rightthrough 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: Blowwarm airoverthearea
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.
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
bebuilt inavery shorttime.However,thework
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.
B. Wing panel.
C. Fuselage.
A.Cowling. D.Horizontalstabilizer.
F. Aluminiumwingdihedralbrace.
E.Verticalstabilizer.
G.Decal sheet

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MUSTANG P51 - Item code: BH33 . Instruction Manual
1) Install the rubber grommets and brass
eyelets onto the aileron servos.
4)Drill 1,6mmpilotholesthroughtheblock
of wood for each of the four mounting screws
provided with the servo.
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, re-
move the masking tape and the servo lead
from the thread.
Bottom of wing
2)Using amodeling knife,remove thecov-
ering at possition show below.
Temporary pin to
keep hinge centered.
Cutthecovering
awayfromtheslot.
Bottom of wing.
Remove the covering.
Assemble then apply drops of thin
C/A to center of hinge,on both sides.
INSTALLING THE AILERON SERVOS.
2. Wheels.
8.Tail gear set.
7. Fuel tank.
4.Spinner
3.Air retract main gear.
1.Door mounting wheel.
5. Plastic part of wing
6.Plastic - enginemount.

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MUSTANG P51 - Item code: BH33 . Instruction Manual
Thread.
Servo wire.
Aileron
servo tray
Removecovering
AileronControlhorn
INSTALLING THEAILERON CONTROLHORN.
Nilon control clasp.
M3 lock nut.
3mm x 40mm.

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MUSTANG P51 - Item code: BH33 . Instruction Manual
Control
horn
C/Aglue
INSTALLING THE AILERON
LINKAGES.
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
andcentertheservo. Installtheservoarmonto
the servo. The servo arm should be perpen-
dicular to the servo and point toward the mid-
dle of the wing.

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MUSTANG P51 - Item code: BH33 . Instruction Manual
6.Insertthe90degree bend down through
the hole in the servo arm. Install one nylon
snap keeper over the wire to secure it to the
arm. Installthe servoarm retainingscrew and
remove the masking tape from the aileron.
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 accommo-
date the aileron pushrod wire.
5.Usingpliers,carefullymake a90 degree
bend down at the mark made. Cut off the ex-
cess wire, leaving about 4mm beyond the
bend.
Bend and cut
M2clevis.
M2locknut. Snapkeeper.
Aileron servo
Aileron

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MUSTANG P51 - Item code: BH33 . Instruction Manual
INSTALLING THE FLAPCONTROL HORN
Flap servo
INSTALLING THE FLAP SERVOS.
Remove covering
C/Aglue
Flap control horn

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MUSTANG P51 - Item code: BH33 . Instruction Manual
Top of wing
Aileron
Flap
Aileron servo
Flap servo
Bottom of wing
INSTALLING RETRACTABLE
LANDING GEAR.
5x35mm. 3x15mm.
3x15mm.
3x6mm.
3x4mm.
3x6mm. 3x4mm.

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MUSTANG P51 - Item code: BH33 . Instruction Manual
Mark point
and Drill a
hole2mm.
secure.
Secure
5x35mm.

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MUSTANG P51 - Item code: BH33 . Instruction Manual
Drillahole3mm
Drillahole3mm
Secure
Secure
Secure
3x6mm 3x8mm

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MUSTANG P51 - Item code: BH33 . Instruction Manual
Secure

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MUSTANG P51 - Item code: BH33 . Instruction Manual
Secure
3x12mm
Cut
C/Aglue

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MUSTANG P51 - Item code: BH33 . Instruction Manual
See pictures below:
INSTALLING THE ENGINE MOUNT.
ENGINE MOUNT.
4X 30mm
end of the line to the weighted clunk and the
otherendtothenylonpickuptubein thestop-
per.
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) Carefullybend thethirdnylon tubedown
ata 45degreeangle (usingacigarettelighter).
This tubewill bevent tubeto thefuelingvalve.
INSTALLING THE STOPPER ASSEMBLY
1) The stopper has been pre-assembled
at the factory.
2) Using a modeling knife, cut one length
ofsiliconfuelline(thelengthofsiliconfuel line
iscalculatedbyhow theweightedclunk should
restabout 8mmawayfromtherearofthetank
andmove freelyinside thetank). Connectone
When the stopper assembly is installed in the
tank, the top of the vent tube should rest just
belowthetopsurfaceof thetank. Itshould not
touch the top of the tank.
FUEL TANK.
Drill a hole
4mmdiameter

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MUSTANG P51 - Item code: BH33 . Instruction Manual
Blow through one of the lines to ensure
the fuel lines have not become kinked inside
the fuel tank compartment. Air should flow
througheasily.
9) Tosecure the fueltank inplace,apply a
bead of silicon sealer to the forward area of
thetank, whereit exitsthefuselagebehind the
enginemountingboxandtotherearof thetank
at the forward bulkhead.
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 frontofthetankshould justabout
touch the back of the firewall.
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.
5) Test fit the stopper assembly into the
tank. It may be necessary to remove some of
the flashing around the tank opening using
amodeling knife. Ifflashing is present, make
sure none of it falls into the tank.
6) When satisfied with the alignment of
thestopperassemblytightenthe3mm x20mm
machine screw until the rubber stopper ex-
pandsand sealsthetankopening. Donotover
tighten the assembly as this could cause the
tank to split.
Vent tube Fuel pick- up tube
Fuelfilltube
Do not secure the tank into place perma-
nently until after balancing the airplane. You
may need to remove the tank to mount the
battery in the fuel tank compartment

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MUSTANG P51 - Item code: BH33 . Instruction Manual
Fueltank
INSTALLING THE ENGINE.
Locate the long piece of wire used for the
throttlepushrod. Oneendofthewire hasbeen
pre-bend in to a “Z” bend at the factory. This
“Z” bend should be inserted into the throttle
armofthe enginewhentheengine isfitted onto
theenginemount.Fittheengineto theengine
mount using the screws provided.
120mm.
Markpoint
4x 30mm
Pushrod wire.
Pushrod wire.

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MUSTANG P51 - Item code: BH33 . Instruction Manual
Right side
Left side
1) Slide the fiberglass cowl over the en-
gineand lineup thebackedgeofthe cowlwith
the marks you made on the fuselage.
COWLING.
Right side
Trim and cut
Bottom side
Trim and cut
Right side
Bottom side
3 x 10mm
Machine screw
Right side

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MUSTANG P51 - Item code: BH33 . Instruction Manual
Secure
Secure
3) Slide the cowl back over the engine
andsecure itin placeusing fourwood screws.
See picture below.
4) Installthe mufflerand mufflerextension
onto the engine and make the cutout in the
cowl for muffler clearance. Connect the fuel
and pressure lines to the carburetor, muffler
andfuelfillervalve.
2) While keeping the back edge of the
cowl flush with the marks, align the front of
thecowlwiththecrankshaftofthe 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.
Left side
Preview
Install the spinner backplate, propeller and
spinner cone. The spinner cone is held in
placeusing two3mm x8mm machinescrews.
INSTALLING THE SPINNER.
INSTALLING THE FUSELAGE
SERVOS.
Tie wrap.
Rudder pushrod
Elevator pushrod
Tie wrap.

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MUSTANG P51 - Item code: BH33 . Instruction Manual
Horizontalstabilizerinstallation.
See picture below.
Recever
HORIZONTALSTABILIZER INSTALLATION.
Cutthecovering
awayfromtheslot.
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.
Remove covering.

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MUSTANG P51 - Item code: BH33 . Instruction Manual
3) Markthe shapeof thevertical ontheleft
and right sides onto the horizontal stabilizer
using a left-tip pen.
4) Remove the stabilizer. Using the lines
youjustdrew asa guide,carefully removethe
coveringfrom betweenthem usingamodeling
knife.
When cutting through the covering to re-
moveit,cut withonly enough pressureto only
cut through the covering it’s self. Cutting into
the balsa structure may weaken it. This could
lead to possible failure during flight.
2) Draw a center line onto the horizontal
stabilizer. Then put the horizontal into the fu-
selage.
Remove covering.
center line
Topelevator
Mark point
Bottom side.
Remove covering.
Bottom side
Check to mark sure the wing and stabi-
lizer are paralell. If they are not, lightly sand
theopeninginthefuselageforthe stabilizer
until the stabilizer is paralell to the wing.