Black Horse Model Mustang P51 User manual

SPECIFICATION


Wingspan : 1,560 mm 61.42 in.


Length : 1,360 mm 53.54 in.


Weight : 3.2 kg 7.04 Lbs.
Parts listing required (not included).


Radio : 06 channels.


Servo : 07 Servos+2 servos Retract (FUTABA,S3170G)


Engine : 61 Cu.in 2 Stroke.
91 Cu.in 4 Stroke.
Instruction Manual book
MadeinVietnam.
Item code BH33-A.

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MUSTANG P51 - Item code: BH33-A . 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.Theywillalso beable
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 yournew airplane,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 toprotect thetable.Keepacoupleof
jars or bowls handy to hold the small parts af-
ter you open the bag.
Pleasetrialfitalltheparts. Makesureyouhave
the correct parts and that they fit and are
alignedproperly beforegluing!Thiswillassure
properassembly.MUSTANG P51 ARF ishand
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-A . 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 clipmustbesecurely attached
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.
Donot standinlinewiththesideof 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
forhelp andsupport.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 havealready built alarge number
ofRC modelspleaseread 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.Horizontal stabilizer.
F. Aluminiumwingdihedralbrace.
E. Rudder.
G.Decal sheet
K. Pilot.
REPLACEMENT LARGE PARTS
REPLACEMENT SMALL PARTS

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MUSTANG P51 - Item code: BH33-A . Instruction Manual
1) Install the rubber grommets and brass
eyelets onto the aileron servos.
2)Using amodeling knife,remove thecov-
ering at possition show below.
Cutthecovering
awayfromtheslot.
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.
Remove
covering.
Bottom of wing.
Temporary pin to
keep hinge centered.
Aileron
Flap

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MUSTANG P51 - Item code: BH33-A . Instruction Manual
4)Drill 1,6mmpilot holesthroughtheblock
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.
Servo wire.
Thread.
Electric wire
5. Instal servo tray with aileron servo into
the wing as same as picture below.
Drill a hole
1.5mm diameter
Secure.
INSTALLINGTHEAILERON CONTROLHORN.
Installaileroncontrolhornassameaspic-
turebelow.
AileronControlhorn
A+B Epoxy
PLUSglue.
INSTALLING THE AILERON
LINKAGES.
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.
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. Install a silicone tube on the
clevis.
Aileron
Control horn
100mm
M2clevis. M2lock nut.

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MUSTANG P51 - Item code: BH33-A . Instruction Manual
6.Insertthe 90degree 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.
Drill a hole
1.7mm
Bend
Snapkeeper.
INSTALLING THE FLAP SERVO.
Aileron servo
Remove
covering.
Flap servo

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MUSTANG P51 - Item code: BH33-A . Instruction Manual
INSTALLING THE FLAP CONTROLHORN
Drill a hole
1.5mm
INSTALLING THE FLAP LINKAGES.
Installing the flap linkages as pictures
Drilla hole
1.5mmdiameter.
Secure.
A+BEpoxy
PLUS glue.
Flap
control horn
100mm
Snap keeper
Bend.

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MUSTANG P51 - Item code: BH33-A . Instruction Manual
Mark point
and Drill a
hole2mm.
INSTALLING RETRACTABLE
LANDING GEAR.
4x12mm
Bottom of wing
Flap servo
Flap
Aileron servo
Aileron
Secure
Repeat the procedure for the other wing
half.
5x35mm. 3x15mm.
3x15mm.
3x6mm.
3x4mm.
3x6mm. 3x4mm.

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MUSTANG P51 - Item code: BH33-A . Instruction Manual
secure.
Secure
5x35mm.

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MUSTANG P51 - Item code: BH33-A . Instruction Manual
Drillahole3mm
Secure
Secure
Secure
3x6mm 3x8mm
hole3mm

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MUSTANG P51 - Item code: BH33-A . Instruction Manual
3x12mm
Secure
Secure

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MUSTANG P51 - Item code: BH33-A . Instruction Manual
See pictures below:
INSTALLING THE ENGINE MOUNT.
ENGINE MOUNT.
Drill a hole
5mmdiameter
C/Aglue
Cut

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MUSTANG P51 - Item code: BH33-A . Instruction Manual
4X 30mm
end of the line to the weighted clunk and the
otherend tothenylonpickuptubein 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
ofsilicon fuelline(thelengthofsiliconfuel line
iscalculatedbyhow theweightedclunk should
restabout 8mmaway fromtherearofthetank
andmove freelyinside thetank). Connectone
When the stopper assembly is installed in the
tank, the top of the vent tube should rest just
belowthe topsurfaceof thetank. Itshould not
touch the top of the tank.
FUEL TANK.
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 exitsthefuselage behindthe
enginemountingbox andtotherearof 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
thestopperassemblytighten the3mm x20mm
machine screw until the rubber stopper ex-
pandsand sealsthetank opening.Do notover
tighten the assembly as this could cause the
tank to split.
Vent tube Fuel pick- up tube
Fuelfilltube

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MUSTANG P51 - Item code: BH33-A . Instruction Manual
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
theengine mount.Fittheengineto theengine
mount using the screws provided.
120mm.
Markpoint
4x 30mm
Pushrod wire.
Pushrod wire.
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
Right side
Fueltank
INSTALLING THE ENGINE.
Tie wrap.

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MUSTANG P51 - Item code: BH33-A . Instruction Manual
Left side
Install one adjustable metal connector
through the third hole out from the center of
one servo arm, enlarge the hole in the servo
arm using a 2mm drill bit to accommodate the
servo connector. Remove the excess mate-
rial from the arm.
INSTALLING THE THROTTLE PUSHROD.
After installing the adjustable metal con-
nector apply a small drop of thin C/A to
the bottom nut. This will prevent the con-
nector from loosening during flight.
Throttle servo
Secure.
Throttle servo
Secure.
Cut.
Throttle pushrod
1) Slide the fiberglass cowl over the en-
gineand lineup thebackedgeofthe cowlwith
the marks you made on the fuselage.
COWLING.

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MUSTANG P51 - Item code: BH33-A . 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
andfuel fillervalve.
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.
Preview
Install the spinner backplate, propeller and
spinner cone. The spinner cone is held in
place using two 3mm x 12mm machine
screws.
INSTALLING THE SPINNER.
Left side
Bottom side
3 x 12mm
Machine screw
Right side
Right side

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MUSTANG P51 - Item code: BH33-A . Instruction Manual
2. Mount the servo to the tray using the
mountingscrews providedwithyourradiosys-
tem.
1. Install the rubber grommets and brass
colletsintothe elevatorservo.Testfit theservo
into the servo tray.
ELEVATOR INSTALLATION.
SERVO INSTALLATION. Temporary pin to
keep hinge centered.
Cutthecovering
awayfromtheslot.
Elevator
servo.
HORIZONTALSTABILIZER INSTALLATION.
Horizontalstabilizerinstallation.
See picture below.
Elevator servo.
Assemble then apply drops of thin
C/A to center of hinge,on both sides.
Top side.
center line
2) Draw a center line onto the horizontal
stabilizer. Then put the horizontal into the fu-
selage.
Check to mark sure the wing and stabi-
lizer are paralell. If they are not, lightly sand
theopening inthefuselageforthe stabilizer
until the stabilizer is paralell to the wing.
1) Using a modeling knife, cut away the
covering from the fuselage for the stabilizer
and remove it.
Top side.

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MUSTANG P51 - Item code: BH33-A . Instruction Manual
Remove
covering.
Bottom side
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
topand bottomofthestabilizermountingarea
and to the stabilizer mounting platform sides
inthefuselage.Slidethestabilizerin placeand
re-align. Double check all of your measure-
ments one more time before the epoxy cures.
Remove any excess epoxy using a paper
towel and rubbing alcohol and hold the stabi-
lizer in place with T-pins or masking tape.
4) Remove the stabilizer. Using the lines
youjustdrew asa guide,carefully removethe
coveringfrom betweenthem usingamodeling
knife.
Whencutting throughthe coveringtoremove
it, cut with only enough pressure to only cut
through the covering it’s self. Cutting into the
balsastructure mayweaken it.Thiscouldlead
to possible failure during flight.
Bottom side.
Mark line.
Mark line.
Topelevator
3) Markthe shapeof thevertical ontheleft
and right sides onto the horizontal stabilizer
using a left-tip pen.
Elevator control horn install as same as the
way of aileron control horn. Please see pic-
tures below.
Controlhornofelevator.
ELEVATORCONTROLHORN INSTALLATION.

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MUSTANG P51 - Item code: BH33-A . Instruction Manual
Epoxyglue
6. After the epoxy has fully cured, re-
move the masking tape or T-pins used to
hold the stabilizer in place and carefully in-
specttheglue joints. Use more epoxy to fill
in any gaps that may exits that were not
filled previously and clean up the excess us-
ing a paper towel and rubbing alcohol.
C/Aglue
C/Aglue
Elevator
control horn
A+BEpoxy
PLUSglue
Drill a hole
1.5mm diameter
Epoxyglue

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MUSTANG P51 - Item code: BH33-A . Instruction Manual
Bottom side
Elevator
pushrod
Elevator
pushrod
Secure
Cut.
Bend and
cut after
Snap keeper
 Elevatorpushrod installas sameas theway
of aileron pushrod.
ELEVATOR PUSHROD INSTALLATION.
M2
Bend