Black Horce Model WESTLAND WYVERN BH112 Owner's manual

Instruction Manual book
SPECIFICATION


Wingspan : 1,700 mm 66.93 in.


Length : 1,540 mm 60.63 in.


Weight : 4.9 kg 10.78 Lbs.


Radio : 08channels.


Servo : 8 Servos + 2 servos Retract (HITEC HS-75BB)


Engine : 20-22 CC Gas
MadeinVietnam.
ITEM CODE:BH 112.

2
WESTLAND WYVERN - Item code:BH112 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 WESTLAND WYVERN 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,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 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.WESTLAND WYVERN ARFis
handmadefromnaturalmaterials,everyplane
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.
Tail section assembly
(1) Vertical stabilizer with pre-
installedrudder.
(1) Horizontal stabilizer with pre-
installedelevator halves.
SUGGESTION.
NOTE.

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WESTLAND WYVERN - Item code:BH112 INSTRUCTION MANUAL.
Caution: this model is not a toy!
Ifyouare abeginner tothis typeofpowered model,please askan experiencedmodelflyer forhelp
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.
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
youhaveto carryout isimportant andmust be donecarefully.The modelwill onlybestrong andfly
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.
REPLACEMENT LARGE PARTS
+ 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.
SAFETY PRECAUTION.
B2
E
F
D2
C
D1
B1
A
G. Decal sheet
G.
A.Cowling.
B.Wing panel (B1,B2).
C. Fuselage.
D. Horizontal stabilizer(D1,D2)
E. Rudder.
F. Aluminium wing
dihedral brace.

4
WESTLAND WYVERN - Item code:BH112 INSTRUCTION MANUAL.
1) Install the rubber grommets and brass
eyelets onto the aileron servos.
2. Door mounting wheel.
1.Retract main gear.
REPLACEMENT SMALL PARTS
11. Spinner.
7. Tail gear set.
6.Plastic parts of Fuselage
4. Drop tank
5. Wheels.
10. Fuel tank.
3. Drop.
9. Tie wrap.
8. Plastic part for tail gear pushrod.
12. Plastic part for tail gear.
1.INSTALLING THE AILERON SERVOS.
I. AILERON.
Aileron
Bottom side

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WESTLAND WYVERN - Item code:BH112 INSTRUCTION MANUAL.
2) 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.
3)Drill 1,6mmpilot holesthroughtheblock
of wood for each of the four mounting screws
provided with the servo.
4. Instal servo tray with aileron servo into
the wing as same as picture below.
2.INSTALLING THE AILERON CONTROL HORN.
Temporary pin to
keep hinge centered.
Assemble then apply drops of thin
C/A to center of hinge,on both sides.
Cutthecovering
awayfromtheslot.
Secure.
Aileroncontrolhorn
A+B Epoxy
PLUS glue
Electric wire
Thread

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WESTLAND WYVERN - Item code:BH112 INSTRUCTION MANUAL.
Repeat the procedure for the other wing
half.
Installing the aileron linkages as pictures
below.
3.INSTALLING THE AILERON
LINKAGES.
Control horn
of the aileron
M2 50 mm
Flap
II. FLAP.
1.INSTALLING THE FLAP SERVOS.

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WESTLAND WYVERN - Item code:BH112 INSTRUCTION MANUAL.
Secure
ControlhornofFlap.
2.INSTALLING THE FLAP CONTROLHORN.
A+ B Epoxy
PLUS glue.
Controlhorn of
theflap.
Installing the aileron linkages as pictures
below.
INSTALLING THE FLAP
LINKAGES.
M2 50mm
Electric
wire

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WESTLAND WYVERN - Item code:BH112 INSTRUCTION MANUAL.
Repeat the procedure for the other wing
half.
INSTALLING AIR RETRACTABLE
LANDING GEAR.
Markpoint.
Drill 2mm hole.
3x15mm
Secure.
Bottom side.
2a. 2b.
1.
5.
3x15mm. 3 x15mm.
a. b
5x35mm.

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WESTLAND WYVERN - Item code:BH112 INSTRUCTION MANUAL.
5X35mm
3 x 16mm
Lock.
Secure.
Secure.
Secure.

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WESTLAND WYVERN - Item code:BH112 INSTRUCTION MANUAL.
Drill a hole
3.2mm diameter
Drill a hole
3.2mm diameter
Drill a hole
3.2mm diameter
Lock .
Lock .
Lock .
Drill a hole
3.2mm diameter

11
WESTLAND WYVERN - Item code:BH112 INSTRUCTION MANUAL.
Connector.
Secure
Connector.

12
WESTLAND WYVERN - Item code:BH112 INSTRUCTION MANUAL.
3x12mm
3x12mm
Secure
3x12mm.
Epoxy glue.
3x12mm

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WESTLAND WYVERN - Item code:BH112 INSTRUCTION MANUAL.
Repeat the procedure for the other wing
half.
Secure.
Secure.
INSTALLING THE ENGINE MOUNT.
See pictures below:
Bottom side.
Drill a hole
6mmdiameter
See pictures below:
INSTALLING THE ENGINE.
Front view.
5x80mm
60mm
Throttle pushrod.

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WESTLAND WYVERN - Item code:BH112 INSTRUCTION MANUAL.
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.
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.
INSTALLING THE THROTTLE - PUSHROD
Throttleservo.
Throttle
servo.
Secure
Throttle
Pushrod.
Secure

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WESTLAND WYVERN - Item code:BH112 INSTRUCTION MANUAL.
Secure.
INSTALLING THE STOPPER ASSEMBLY
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.
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
end of the line to the weighted clunk and the
otherend tothenylonpickuptubein thestop-
per.
Cut.
Throttle pushrod.
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.

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WESTLAND WYVERN - Item code:BH112 INSTRUCTION MANUAL.
Secure
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.
Vent tube Fuel pick- up tube
Fuelfilltube
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.
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
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) To securethe fuel tankin place,applya
bead of silicon sealer to the forward area of
thetank, whereit exitsthefuselage behindthe
enginemountingbox andtotherearof thetank
at the forward bulkhead.
Tie wrap.
(Tygon gas tubing not included)

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WESTLAND WYVERN - Item code:BH112 INSTRUCTION MANUAL.
FuelTank
COWLING.
1. Slide the fiberglass cowl over the en-
gineand lineup thebackedgeofthe cowlwith
the marks you made on the fuselage.
Top side.
Bottom side.
Tie wrap.
Trim and cut
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.
3. Slide the cowl back over the engine
andsecure itin placeusing fourwood screws.
See picture below.
4. Installthemufflerandmuffler extension
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.

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WESTLAND WYVERN - Item code:BH112 INSTRUCTION MANUAL.
INSTALLING THE SPINNER.
Installthe spinnerbackplate,propellerand
spinner cone. The spinner cone is held in
placeusing two3mm x8mm machinescrews.
Secure
Drill 2.5mm
hole.
3x12mm
Secure
Front view.
Left side.

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WESTLAND WYVERN - Item code:BH112 INSTRUCTION MANUAL.
Secure
See pictures below:
HORIZONTAL STABILIZER.
1. Install the rubber grommets and brass
colletsinto theelevatorservo.Testfitthe servo
into the servo tray.
2. Mount the servo to the tray using the
mountingscrews providedwithyourradiosys-
tem.
ELEVATOR INSTALLATION.
SERVO INSTALLATION.
Bottom side.
Temporary pin to
keep hinge centered.
Cutthecovering
awayfromtheslot.
Elevator
servo.
Elevator servo .

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WESTLAND WYVERN - Item code:BH112 INSTRUCTION MANUAL.
Assemble then apply drops of thin
C/A to center of hinge,on both sides.
145mm
9mm
Epoxy glue.