Black Horse Model JU87-STUKA Owner's manual

SPECIFICATION
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Wingspan : 1,920 mm 75.59 in.
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Length : 1,560 mm 61.42 in.
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Weight : 5 kg 11.00Lbs.
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Radio : 06 channels.
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Servo : 09 servos.
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Engine : 120 4 stroke.
Instruction Manual book
MadeinVietnam.

JU87-STUKA - Item code: BH80 . Instruction Manual
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This instruction manual is designed to help you build a great flying aeroplane. Please read this
manual thoroughly before starting assembly of your JU87-STUKA. 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
proper assembly. JU87-STUKA is hand made
from natural materials, every plane is unique
andminor adjustmentsmayhave tobe 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 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.
Tail section assembly
(1) Vertical stabilizer with pre-
installedrudder.
(1) Horizontal stabilizer with pre-
installedelevator halves.
SUGGESTION.
NOTE.

JU87-STUKA - Item code: BH80. INSTRUCTION MANUAL
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+ 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.
REPLACEMENT LARGE PARTS
B. Wing panel.
C. Fuselage.
A.Cowling.
D . Horizon stabilizer.
F. Aluminium wing dihedral brace.
E.Vertical stabilizer.
REPLACEMENT SMALL PARTS
3a. Plastic bomb.
2. Oleo Strut
5. Plastic - enginemount.
6. Tail gear set.
8. Fuel tank.
9.Spinner
10. Horizon stabilizer struts.
14. Plastic top wing.
12.Plastic fairing for landing gear.
 1) Install the rubber grommets and brass
eyelets onto the aileron servos.
1.INSTALLING THE AILERON SERVOS.
I.AILERON.
11.Angten top cannopy.
4. Wheel spat.
13. Wheels.
3b. Plastic bomb.
1. Under carriage struts.
A.
B. B.
C. D.
E.
F.
Bottom side
Aileron
Flap 1
Flap 2
7. Plastic fairing for tail gear set.
4.
1.
2.
6.
5.
9.
12.
14.
13.
8.
10.
7.
3a.
3b.
11.

JU87-STUKA - Item code: BH80 . Instruction Manual
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Aileroncontrolhorn
C/Aglue.
Repeat the procedure for the other wing
half.
Installing the aileron linkages as pictures
below.
2.INSTALLING THE AILERON
LINKAGES.
M2 lock nut
M2 95mm

JU87-STUKA - Item code: BH80. INSTRUCTION MANUAL
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 4) Drill1,6mm pilotholes throughtheblock
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.
Secure
 2) Usinga modelingknife, removethe cov-
ering at possition show below.
Bottom side
 5. Instal servo tray with aileron servo into
the wing as same as picture below.
Secure
Bottom side
2x10mm.
Remove
covering
1.INSTALLING THE FLAP1 SERVOS.
C/Aglue
Electric wire
thread

JU87-STUKA - Item code: BH80 . Instruction Manual
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Flap control
horn.
Bottom side
Removecovering
M3 lock nut. 3mm x 40mm.
Nilon control clasp.
Remove
covering
2.INSTALLING THE FLAP CONTROL HORN.
Thread
Electricwire.
Secure
Bottom side

JU87-STUKA - Item code: BH80. INSTRUCTION MANUAL
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Installing the flap1 linkages as pictures
below.
3. INSTALLING THE FLAP1
LINKAGES.
M2 lock nut
M2 125mm
C/Aglue
C/Aglue
2.INSTALLING THE FLAP2 CONTROL HORN.
Removecovering
Repeat the procedure for the other flap1.
M3 lock nut. 3mm x 40mm.
Nilon control clasp.

JU87-STUKA - Item code: BH80 . Instruction Manual
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Repeat the procedure for the other wing
half.
PARTSREQUIRED
MAIN GEAR INSTALATION.
3 x 15mm
Installing the flap2 linkages as pictures
below.
3. INSTALLING THE FLAP2
LINKAGES.
M2 lock nut
M2 135mm
C/Aglue
C/Aglue
Aileron
Flap2 Flap1

JU87-STUKA - Item code: BH80. INSTRUCTION MANUAL
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Secure
Drill 2mm
hole
3 x 15mm
Drill 2mm
hole

JU87-STUKA - Item code: BH80 . Instruction Manual
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Secure
Secure

JU87-STUKA - Item code: BH80. INSTRUCTION MANUAL
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Secure
Secure
C/A glue
C/A glue

JU87-STUKA - Item code: BH80 . Instruction Manual
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INSTALLING THE ENGINE MOUNT.
See pictures below:
4x 30mm
4x 30mm
C/A glue

JU87-STUKA - Item code: BH80. INSTRUCTION MANUAL
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INSTALLING THE STOPPER ASSEMBLY
 1. The stopper has been pre-assembled at
the factory.
FUEL TANK.
Vent tube Fuel pick- up tube
Fuelfilltube
Drill a hole
4mmdiameter
 2.Using amodeling knife,cut onelength of
siliconfuelline (thelength ofsilicon fuellineis
calculated by how the weighted clunk should
restabout 8mmaway fromtherearofthetank
andmove freelyinside thetank). Connectone
end of the line to the weighted clunk and the
otherend tothenylonpickuptubein thestop-
per.
 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.
 3. Carefullybend thesecond nylontube up
ata 45degreeangle (usingacigarettelighter).
This tube will be the vent tube to the muffler.
 4. Carefullybend thethird nylontube down
ata 45degreeangle (usingacigarettelighter).
This tubewill bevent tubeto thefuelingvalve.
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.

JU87-STUKA - Item code: BH80 . Instruction Manual
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 6. When satisfied with the alignment of the
stopper assembly tighten the 3mm x 20mm
machine screw until the rubber stopper ex-
pandsand sealsthetank opening.Do notover
tighten the assembly as this could cause the
tank to split.
 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.
 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.
 9. To secure the fuel tank in place, apply a
bead of silicon sealer to the forward area of
thetank, whereit exitsthefuselage behindthe
enginemountingbox andtotherearofthetank
at the forward bulkhead.
Blow through one of the lines to ensure
the fuel lines have not become kinked inside
the fuel tank compartment. Air should flow
througheasily.
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.
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 isfittedonto
theengine mount.Fittheengineto theengine
mount using the screws provided.
INSTALLING THE ENGINE.
Fueltank

JU87-STUKA - Item code: BH80. INSTRUCTION MANUAL
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150mm
Markpoint
Drill a hole
4mm diameter.
4 x 30mm
Secure
Pushrod wire
 1. Slide the fiberglass cowl over the en-
gineand lineup thebackedgeofthe cowlwith
the marks you made on the fuselage.
COWLING.

JU87-STUKA - Item code: BH80 . Instruction Manual
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2. While keeping the back edge of the
cowl flush with the marks, align the front of
thecowlwiththecrankshaftoftheengine. 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.
4. Installthemufflerandmufflerextension
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.
3. Slide the cowl back over the engine
andsecure itin placeusing fourwood screws.
See picture below.
Right side
Trim and
cut after.
Leftside
Right side
Leftside
Machine screw.
INSTALLING THE SPINNER.
Installthe spinnerbackplate,propellerand
spinner cone. The spinner cone is held in
place using two 3mm x 12mm wood screws.
Front view

JU87-STUKA - Item code: BH80. INSTRUCTION MANUAL
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3 x 12mm
 1. 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.
Secure
Secure
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.
Servo arm.
Connector.
Throttle servo
Secure

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Cut
SERVO INSTALLATION.
ELEVATOR INSTALLATION.
 1. Install the rubber grommets and brass
colletsintotheelevatorservo.Test fittheservo
into the servo tray.
See pictures below:
HORIZONTAL STABILIZER.
 2. Mount the servo to the tray using the
mountingscrews providedwithyourradiosys-
tem.
C/Aglue
C/Aglue
C/Aglue
C/Aglue

JU87-STUKA - Item code: BH80. INSTRUCTION MANUAL
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Center line
 2 Using a modeling knife, cut away the
covering from the fuselage for the stabilizer
and remove it.
C/Aglue
C/Aglue
 1. Draw a center line onto the horizontal
stabilizer. Then slide the horizontal into the
fuselage.
Removecovering.
 3. Marktheshape ofthe verticalon theleft
and right sides onto the horizontal stabilizer
using a felt-tip pen
 4. Remove the stabilizer. Using the lines
youjustdrew asa guide,carefully removethe
coveringfrom betweenthem usingamodeling
knife.
When cutting through the covering
to remove it, cut with only enough pres-
sure to only cut through the covering it’s
self. Cutting into the balsa structure may
weaken it. This could lead to possible fail-
ure during flight.
Markline.
Removecovering.

JU87-STUKA - Item code: BH80 . Instruction Manual
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 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.Slidethestabilizerinplaceand
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.
6. Afterthe epoxy has fully cured, remove
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 were not filled previously and
clean up the excess using a paper towel and
rubbingalcohol.
Epoxyglue.
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.
C/Aglue
HORIZONTAL STABILIZER STRUTS.