Black Horse Model Viper Jet MKII Owner's manual

SPECIFICATION
Instruction Manual book


Wingspan : 1,400 mm 55.12 in.


Length : 1,350 mm 53.15 in.


Weight : 3.7 kg 8.14 Lbs.


Radio : 09 channels.


Servo : 08 size (29 x 13 x 30) mm .


EDF : 90mm MIDI -FAN EVO/HET 650 - 68 - 2000


Battery: 6S-LIPO - 22,2V -5,500 - 7,200mAh


Speed control: 120A
Electric gear retracts and nose gear retract 10Lb(5kg).
Not including electric gears (only including oleo struts).
MadeinVietnam.
Item code:BH133

2
VIPER JET MKII - Item code: BH133 . 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 Viper Jet MKII. 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
Landing gear.....
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
proper assembly.Viper Jet MKII 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 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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VIPER JET MKII - Item code: BH133 . INSTRUCTION MANUAL
Caution: this model is not a toy!
Ifyouare abeginner tothistype ofpowered model,pleaseask anexperienced modelflyerfor 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.
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 is importantand mustbedone carefully.The model willonly bestrongand 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.
+ This is not a toy
+ Be sure that no other flyers are using your radio frequency.
+ Wear safety glasses.
+ The glow plug clip must be securely attached to the glow plug.
+ Do not start the EDF if people are near.
SAFETY PRECAUTION.

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VIPER JET MKII - Item code: BH133 . INSTRUCTION MANUAL
REPLACEMENT LARGE PARTS
D2.Carbon tube horizontal stabilizer.
B. Wing panel.
A.Fuselage.
C.Horizontal stabilizer.
REPLACEMENT SMALL PARTS
2.Oleo struts landing gear.
1.Oleo strut nose gear.
5.Plywood of nose gear
6.Plastic parts of bottom tail fuselage.
B.
A.
B.
D 1.
C. C.
D 2.
3.Plywood of verticalstabilizer
4.Plastic part of tail fuselage.
2.
5.
4.
6.
1.
3.
G.
G. Decal sheet
D1. Carbon tube wing

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VIPER JET MKII - Item code: BH133 . INSTRUCTION MANUAL
1) Install the rubber grommets and brass
eyelets onto the aileron servos.
2.Usinga modelingknife,remove thecov-
ering servo tray.
4.Drill1,5mm pilotholes through theblock
of wood for each of the four mounting screws
provided with the servo. Install servo into ai-
leron servo tray as same as picture below.
Bottom side
Aileron
Thread
Electric wire
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.
Servo tray.
servo tray.
I. AILERON.
1.INSTALLING THE AILERON SERVOS.

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VIPER JET MKII - Item code: BH133 . INSTRUCTION MANUAL
Aileroncontrolhorn
Repeat the procedure for the other wing
half.
A+B Epoxy
PLUS glue
AB
INSTALLINGTHEAILERON CONTROLHORN.
Installing the aileron linkages as pictures
below.
INSTALLING THE AILERON
LINKAGES.
Repeat the procedure for the other wing
half.
Repeat the procedure for the other wing
half.
2x10mm.
Secure
A+B Epoxy
PLUS glue
Control horn
theaileron.
Aileron.
M2 lock nut
M2
47 mm

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VIPER JET MKII - Item code: BH133 . INSTRUCTION MANUAL
II. FLAP SERVO.
1.INSTALLING THE FLAP SERVOS.
Electric wire
Secure.
Flap controlhorn
2.INSTALLING THE FLAP CONTROL HORN.
Installing the flap linkages as pictures
below.
2x10mm.
Flap.
A+B Epoxy
PLUS glue
Flap control
horn.
3. INSTALLING THE FLAP
LINKAGES.
M2 lock nut
M2
47 mm

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VIPER JET MKII - Item code: BH133 . INSTRUCTION MANUAL
Repeat the procedure for the other wing
half.
Bottom side.
Aileron.
Flap
4x12mm
Secure
PARTSREQUIRED
3x15mm.
3x15mm.
Electric retract
(notincluded)
INSTALLING OLEO STRUTS LANDING GEAR.

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VIPER JET MKII - Item code: BH133 . INSTRUCTION MANUAL
Cut & trim a rectangle 4x8mm through
plastic for mounting of electric wire lead
out.
4x8mm
3x15mm.
Secure.
Secure.

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VIPER JET MKII - Item code: BH133 . INSTRUCTION MANUAL
Secure.
Repeat the procedure for the other gear.
Bottom side.
Seepicturesbelow:
INSTALLINGELECTRICEDF-90MM.
(Notincluded)
Open

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VIPER JET MKII - Item code: BH133 . INSTRUCTION MANUAL
3x15mm
Secure.
Secure.
.Plastic parts of tail fuselage.
A+B Epoxy
PLUS glue
A+B Epoxy
PLUS glue

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VIPER JET MKII - Item code: BH133 . INSTRUCTION MANUAL
Elevator
Servo
2x10mm.
Secure.
Repeat the procedure for the
other elevator half.
See picture below.
INSTALLING THE ELEVATOR SERVOS.
Bottom side.
Elevator control horn install as same as the
way of aileron control horn. Please see pic-
tures below.
Elevator control horn.
 Elevatorpushrod installas sameas theway
of aileron pushrod.
Elevator
control horn.
A+B Epoxy
PLUS glue
ELEVATORCONTROL HORN INSTALLATION.
35mm
ELEVATOR PUSHROD INSTALLATION.

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VIPER JET MKII - Item code: BH133 . INSTRUCTION MANUAL
Elevator
pushrod
Bottom side.
350 mm
Carbon tube 8mm
HORIZONTAL STABILIZER
INSTALLATION.
Push.

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VIPER JET MKII - Item code: BH133 . INSTRUCTION MANUAL
Epoxy
glue.
C/Aglue.
Epoxyglue.
Rudder servo install as same as method of
elevatorservo.
See picture below:
Top side.
C/Aglue.
Bottom side.
VERTICAL STABILIZER INSTALLA-
TION.

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VIPER JET MKII - Item code: BH133 . INSTRUCTION MANUAL
servo tray.
Rudder servo
servo wire.
2x10mm.
Secure.
Rudder control horn install as same as the
way of aileron control horn. Please see pic-
tures below.
ControlhornofRudder.
RUDDER CONTROL HORN INSTALLA-
TION.
Control horn
Rudder.
A+B Epoxy
PLUS glue

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VIPER JET MKII - Item code: BH133 . INSTRUCTION MANUAL
Rudder
pushrod
Rudder pushrod
RUDDER PUSHROD INSTALLATION.
 Rudder pushrod install as same as the way
of aileron pushrod.
35mm.
ESC
INSTALLING ESC.
3x12mm 3x15mm
Seepicturebelow:
Secure.
INSTALLING OLEO STRUT NOSE GEAR.

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VIPER JET MKII - Item code: BH133 . INSTRUCTION MANUAL
Secure.
Seepicturebelow:
wire cable.
wire cable.
INSTALLING SERVO NOSE GEAR.
Servo
nose gear
Ply wood nose gear.
C/Aglue.
Servo
nose gear
Nose cable wire.

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VIPER JET MKII - Item code: BH133 . INSTRUCTION MANUAL


3. Position the battery pack and receiver
is as picture below.
Donot permanentlysecure thereceiver and
battery until after balancing the model.


1. Plug the servo leads and the switch
leadinto the receiver. You may want to plug
anaileronextensioninto 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 vi-
bration.Use arubberbandormasking tapeto
hold the foam in place.
INSTALLING THE RECEIVERAND BATTERY.
Tie wrap.
UBEC
Batteryof receiver.
INSTALLING THE FUSELAGE TOPHATCH.
Battery of
EDF.
receiver
ESC

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VIPER JET MKII - Item code: BH133 . INSTRUCTION MANUAL
Push.
Locate the carbon tube wing dihedral brace.
480mm
Carbon 12mm tube
WINGATTACHMENT.
C/Aglue.
Secure.
Bottom side.
Rightwing.
Secure.
Leftwing.
Left wing.
Secure.

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VIPER JET MKII - Item code: BH133 . INSTRUCTION MANUAL
Plasticpartsbottomtailfuselage.
Plywoodofverticalstabilizer.
A+B Epoxy
PLUS glue


1) It is critical that your airplane be bal-
anced correctly. Improper balance will cause
your plane to lose control and crash.
THE CENTER OF GRAVITY IS LOCATED
141 MM BACK FROMTHE LEADINGEDGE
OF THE WING.


2) Mount the wing to the fuselage. Using a
couple of pieces of masking tape, place them
onthe topsideofthewing 141 mm back from
the leading edge, at the fuselage sides.


3. Turn the airplane upside down. Place
your fingers on the masking tape and care-
fully lift the plane .
BALANCING.