Black Horse Model BH175 User manual

VIPER JET MKII
ALL BALSA - PLY WOOD CONSTRUCTION
COVERED IN A HEAT-SHRINK FILM WITH PRINTED.
NOT INCLUDING ELECTRIC RETRACT GEAR
ONLY INCLUDING CNC SUSPENSION METAL STRUTS.
95% ALMOST READY TO FLY
SPECIFICATION:
- Wingspan: 1,885mm (74.21 in).
- Length: 1,820mm (71.65 in).
- Weight: 8.9 - 9.1kg (19.58 - 20 lbs).
- Wing area: 62.2dm2.
- Wing loading:143.1g/dm2.
- Wing type: Naca Airfoil.
- Gear type: Electric retract gear,
size: (92.55 x 51 x 35.1)mm (not included).
CNC Suspension Metal Struts (included).
Parts listing required (not included):
- Radio: 8 channels minimum.
- Servo: 8 standard high torque servos, size: (33 x 17)mm.
- Engine: EDF 120mm.
- Battery: 10S - 12S LIPO 37V- 44.4 V.
- ESC: 160A.
Recommended EDF and Battery set up
(not included):
- Engine: Ducted Fan EDF JETFAN-120 eco
Ejets+ HET 800-68-685.
- Battery: 12S LIPO – 44.4 V ≥ 6000mAh 40C.
- Or Engine: Ducted Fan EDF Schubeler
DS-86-AXI HDS 120mm + TP 5660-9D motor.
- Battery: 10S LIPO - 37V ≥ 6000mAh 40C.
- ESC: 160A Phoenix Castle.
Instruction Manual Book
Item code: BH175
Made in Vietnam.
Glow and EP

Viper Jet MKII Item code: BH175 Instruction Manual
TABLE OF CONTENTS
Academy of Model Aeronautics: If you are not already a member of the AMA, please join! The AMA is the
governing body of model aviation and membership provides liability insurance coverage, protects modelers’
rights and interests and is required to fly at most R/C sites.
Academy of ModelAeronautics
5151 East Memorial Drive Muncie IN 47302-9252
Tele. [phone]
Fax. [phone]
Or via the Internet at: http://www.modelaircraft.org
SINCE 1939
INTRODUCTION
Thank you for purchasing Black Horse Model products. With over 18 years experience in production and fly
testing, Black Horse Model is committed to bring the best quality products and good service to customers. Along
with a team of creative engineers and skilled workers, we will always accompany with customers by our great
experiences, fully enthusiasm... which will burn our passion!! Joining with us to explore and conquer challenges
in the sky ...
Your satisfaction is our success. Please read through this manual before starting construction.
2
Introduction...............................................2
Warranty....................................................3
Disclaimer..................................................3
Safety precaution......................................3
Important building notes............................3
Suggestion................................................3
Flight warnings..........................................3
Covering tools...........................................4
Adhesives and required tools....................4
Academy of Model Aeronautics National
Model Aircraft Safety Code........................4
Parts listing (not included).........................6
Tools & supplies needed...........................6
Symbols used throughout this instruction
manual comprise.......................................6
Preparations..............................................8
Installing the ailerons and flaps.................8
Installing the aileron and flap servo...........9
Installing the aileron and flap linkages.....11
Installing main gear.................................13
Electric gear retracts...............................14
Installing horizontal stabilizer..................18
Installing the horizontal stabilizer
servo.......................................................19
Installing the horizontal stabilizer
linkages...................................................22
Installing the vertical stabilizer.................25
Installing the vertical stabilizer servo.......26
Installing the vertical stabilizer
linkages...................................................28
Installing the nose gear retract................32
Installing the edf and lip of air inlet and
outlet........................................................37
Secure the wing to the fuselage...............43
Installing the receiver and battery............45
Installing the swith...................................45
Installing cockpit fuselage........................46
Balacing...................................................48
Lateral balance................................................48
Control throws.................................................50
Flight preparation pre flight check............50
For your radio installation Basic connection
for airplane And adjustment of servos......51
Main gear dimensional detail....................52
Decoration................................................53
Exploded view..........................................54

Viper Jet MKII Item code: BH175 Instruction Manual
Black Horse Model guarantees the component parts
in this kit to be free from defects in both material and
workmanship at the date of purchase by the
purchaser.
This warranty does not cover cosmetic damage or
damage due to acts of God, accident, misuse,
abuse, negligence, commercial use, or modification
of or to any part of the Product.
This warranty does not cover damage due to
improper installation, operation, maintenance, or
attempted repair by anyone other than Black Horse
Model.
Further, Black Horse Model reserves the right to
change or modify this warranty without notice.
WARRANTY
Read this disclaimer carefully before using this
product. Please strictly follow the instruction manual
to assemble and use this.
In that Black Horse Model has no control over the
final assembly or material used for final assembly,
Black Horse Model is not responsible for loss of use ,
or other incidental or consequential damages.
Furthermore, Black Horse Model cannot be held
liable for personal injury or property damage caused
by the use or misuse of Black Horse Model products.
By the act of using the user-assembled products, the
user accepts all resulting liability.
DISCLAIMER
Please trial fit all the parts. Make sure you have the
correct parts and that they fit and are aligned properly
before gluing! This will assure proper assembly. This
kit is hand made from natural materials, every plane
is unique and minor adjustments may have to be
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 following: paint thinner,
C/A glue accelerator, C/A glue debonder and
acetone. Do not let these chemicals come in contact
with the colors on the covering and the plastic parts.
Some parts included in this kit such as the cowl or
wheel pants are made of fiberglass, the fibers of
which may cause eye, skin and respiratory tract
irritation. Never blow into a part to remove fiberglass
dust, as the dust will blow back into your eyes.
Always wear safety goggles, a particle mask and
rubber gloves when grinding, drilling and sanding
fiberglass parts. Vacuum the parts and the work area
thoroughly after working with fiberglass parts.
IMPORTANT BUILDING NOTES
To avoid scratching your new 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 aircraft and to
protect the table. Keep a couple of jars or bowls
handy to hold the small parts after you open the bag.
SUGGESTION
Always operate in open areas, away from factories,
hospitals, schools, buildings and houses etc.
NEVER fly your aircraft close to people or built up
areas.
NEVER fly near power lines, aerials or other
dangerous areas including airports, motorways etc.
NEVER fly in wet conditions or on windy or stormy
days.
ALWAYS adjust the engine from behind the
propeller, and do not allow any part of your body to
be in line with the propeller.
THE PROPELLER IS DANGEROUS Keep fingers,
clothing (ties, shirt sleeves, scarves) or any other
loose objects that could be caught or drawn in,
away from the propeller. Take care at ALL times.
NEVER use damaged or deformed propellers
or spinners.
Keep all onlookers (especially small children and
animals) well back from the area of operation. This
is a flying aircraft, which will cause serious injury in
case of impact with a person or animal.
DO NOT dispose of empty fuel containers on a fire,
this can lead to an explosion.
FLIGHT WARNINGS
This is not a toy and pilots must be over the age
of 14
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.
Moisture causes damage to electronics. Avoid
water exposure to all equipment not specifically
designed and protected for this purpose.
SAFETY PRECAUTION
3

Viper Jet MKII Item code: BH175 Instruction Manual
When ready to fly, first extend the transmitter aerial.
Switch on the transmitter.
Switch on the receiver.
Check that the wings are correctly fitted to the
fuselage.
Operate the control sticks on the transmitter and
check that the control surfaces move freely and in
the CORRECT directions.
Check that the transmitter batteries have adequate
power.
ALWAYS take off into the wind.
If the model does not respond correctly to the
controls, land it as soon as possible and correct the
fault.
ALWAYS land the model INTO the wind, this ensures
that the model lands at the slowest possible speed.
Switch off the receiver.
Switch off the transmitter.
Empty the fuel tank after flying, fuel left in the tank
can cause corrosion and lead to engine problems.
A. GENERAL: A model aircraft is a non-human-carrying aircraft capable of sustained flight in the atmosphere. It may
not exceed limitations of this code and is intended exclusively for sport, recreation, education and/or competition.
All model flights must be conducted in accordance with this safety code and anyadditional rules specific to the
flying site.
1. Model aircraft will not be flown:
(a) In a careless or reckless manner.
(b) At a location where model aircraft activities are prohibited.
2. Model aircraft pilots will:
(a) Yield the right of way to all human-carrying aircraft.
(b) See and avoid all aircraft and a spotter must be used when appropriate. (AMA Document #540-D.)
(c) Not fly higher than approximately 400 feet above ground level within three (3) miles of an airport without notifying
the airport operator.
(d) Not interfere with operations and traffic patterns at any airport, heliport or seaplane base except where there is a
mixed use agreement.
(e) Not exceed a takeoff weight, including fuel, of 55 pounds unless in compliance with the AMA Large Model
Airplane program. (AMA Document 520-A.)
(f) Ensure the aircraft is identified with the name and address or AMA number of the owner on the inside or affixed
to the outside of the model aircraft. (This does not apply to model aircraft flown indoors.)
(g) Not operate aircraft with metal-blade propellers or with gaseous boosts except for helicopters operated under the
provisions of AMA Document #555.
(h) Not operate model aircraft while under the influence of alcohol or while using any drug that could adversely affect
the pilot’s ability to safely control the model.
(i) Not operate model aircraft carrying pyrotechnic devices that explode or burn, or any device which propels a
projectile or drops any object that creates a hazard to persons or property.
Exceptions:
• Free Flight fuses or devices that burn producing smoke and are securely attached to the model aircraft during
flight.
• Rocket motors (using solid propellant) up to a G-series size may be used provided they remain attached to the
model during flight. Model rockets may be flown in accordance with the National Model Rocketry Safety Code
but may not be launched from model aircraft.
Academy of Model Aeronautics National Model Aircraft Safety Code
Effective January 1, 2014
FLIGHT WARNINGS ADHESIVES AND REQUIRED TOOLS
Top Flite® MonoKote® Sealing Iron
Top Flite Hot Sock Iron Cover
Top Flite MonoKote Trim Seal Iron
Top Flite MonoKote Heat Gun
COVERING TOOLS
Thin CA
30-minute epoxy
6-minute epoxy
Threadlocker thread locking cement
Mixing sticks
Mixing cups (GPMR8056)
Epoxy brushes
Denatured alcohol
Canopy Glue
Felt-tipped pen or pencil
Flat screwdriver
Adjustable wrench
Drill
Hobby knife
Masking tape
Phillips screwdriver (large)
Phillips screwdriver (small)
Ruler
Sandpaper
Soldering iron
Solder
Hex wrench
Drill bit: 1/16-inch (1.5mm), 5/64-inch (2mm),
1/8-inch (3,2mm), 3/16-inch (4,8mm),11/64-inch
(4.5mm), 13/64-inch (5,2mm), 1/4-inch (6,4mm)
4

Viper Jet MKII Item code: BH175 Instruction Manual
• Officially designated AMA Air Show Teams (AST) are authorized to use devices and practices as defined within
the Team AMA Program Document. (AMA Document #718.)
(j) Not operate a turbine-powered aircraft, unless in compliance with the AMA turbine regulations. (AMA Document
#510-A.)
3. Model aircraft will not be flown in AMA sanctioned events, air shows or model demonstrations unless:
(a) The aircraft, control system and pilot skills have successfully demonstrated all maneuvers intended or anticipated
prior to the specific event.
(b) An inexperienced pilot is assisted by an experienced pilot.
4. When and where required by rule, helmets must be properly worn and fastened. They must be OSHA, DOT,
ANSI, SNELL or NOCSAE approved or comply with comparable standards.
B. RADIO CONTROL (RC)
1. All pilots shall avoid flying directly over unprotected people, vessels, vehicles or structures and shall avoid
endangerment of life and property of others.
2. A successful radio equipment ground-range check in accordance with manufacturer’s recommendations will be
completed before the first flight of a new or repaired model aircraft.
3. At all flying sites a safety line(s) must be established in front of which all flying takes place. (AMA Document
#706.)
(a) Only personnel associated with flying the model aircraft are allowed at or in front of the safety line.
(b) At air shows or demonstrations, a straight safety line must be established.
(c) An area away from the safety line must be maintained for spectators.
(d) Intentional flying behind the safety line is prohibited.
4. RC model aircraft must use the radio-control frequencies currently allowed by the Federal Communications
Commission (FCC). Only individuals properly licensed by the FCC are authorized to operate equipment on
Amateur Band frequencies.
5. RC model aircraft will not knowingly operate within three (3) miles of any pre-existing flying site without a
frequency-management agreement. (AMA Documents #922 and #923.)
6. With the exception of events flown under official AMA Competition Regulations, excluding takeoff and landing, no
powered model may be flown outdoors closer than 25 feet to any individual, except for the pilot and the pilot's
helper(s) located at the flightline.
7. Under no circumstances may a pilot or other person touch an outdoor model aircraft in flight while it is still under
power, except to divert it from striking an individual.
8. RC night flying requires a lighting system providing the pilot with a clear view of the model’s attitude and
orientation at all times. Hand-held illumination systems are inadequate for night flying operations.
9. The pilot of an RC model aircraft shall:
(a) Maintain control during the entire flight, maintaining visual contact without enhancement other than by corrective
lenses prescribed for the pilot.
(b) Fly using the assistance of a camera or First-Person View (FPV) only in accordance with the procedures outlined
in AMA Document #550.
(c) Fly using the assistance of autopilot or stabilization system only in accordance with the procedures outlined in
AMA Document #560.
C. FREE FLIGHT
1. Must be at least 100 feet downwind of spectators and automobile parking when the model aircraft is launched.
2. Launch area must be clear of all individuals except mechanics, officials, and other fliers.
3. An effective device will be used to extinguish any fuse on the model aircraft after the fuse has completed its
function.
D. CONTROL LINE
1. The complete control system (including the safety thong where applicable) must have an inspection and pull test
prior to flying.
2. The pull test will be in accordance with the current Competition Regulations for the applicable model aircraft
category.
3. Model aircraft not fitting a specific category shall use those pull-test requirements as indicated for Control Line
Precision Aerobatics.
4. The flying area must be clear of all utility wires or poles and a model aircraft will not be flown closer than 50 feet
to any above-ground electric utility lines.
5. The flying area must be clear of all nonessential participants and spectators before the engine is started.
5

Viper Jet MKII Item code: BH175 Instruction Manual
Wire cutters.
Hex Wrench.
Threadlocker
(screw cement).
Hand or
electric drill.
cm
12345678
910
Straight edge ruler.
Some more tools.
Assorted drill bits.
Masking tape.
Paper towels.
Rubbing alcohol
90° square or builder's triangle.
Screw driver
Medium C/A glue
EPOXY A
EPOXY B
30 minute epoxy.
5 minute epoxy.
Modeling knife.
2 bender plier
TOOLS & SUPPLIES NEEDED
PARTS LISTING (NOT INCLUDED).
Cut off excess.
BApply epoxy glue.
Apply threadlocker
(screw cement).
C . A
Apply instant glue
(C.A glue, super glue).
Cut off shaded portion
carefully.
Assemble left and right
sides the same way.
Must be purchased
separately!
Ensure smooth, non-binding
movement when assembling.
Warning!
Set all scerws securely. If they come off during
flight you will lose control of your aircraft!
Pay close attention here. Drill holes using the stated.
(in this case 1.5mm ).
1.5mm
Take particular care here.
The number of times
the same way Assembly
(in this case twice).
2
Symbols used throughout this instruction manual, comprise:
6
Servos size: (32.3x16.8x31)mm.
Torque: 4.8V(3.89kg-cm), 6V(4.82 kg-cm).... 6pcs ESC: 160A ..... 1pcs
LiPo: 6 Cell ...................2 Packs
LiPo: 4 Cell ...................2 Packs
BATTERY
ESC
EDF: 120mm
Servo extension leads.
................. pcs.2
................. 1 pcs.
190mm ...... 8 pcs.
330mm ...... 2 pcs.
720mm ...... 3 pcs.

Viper Jet MKII Item code: BH175 Instruction Manual
7
: Fuselage.
: Wing panel (2a, 2b).
: Horizontal stabilizer (3a, 3b).
: Vertical stabilizer.
: Aluminium wing dihedral brace.
: Aluminium tube horizontal stabilizer..
: Aluminium tube vertical stabilizer.
: Cockpit fuselage ( 8a: Canopy, 8b: Pilot, 8c: Cockpit).
: Wing tip (9a,9b).
:Plastic air intake (10a, 10b).
: Fiberglass air outflow.
1
2
3
4
5
6
7
8
7
9
10
11
: Fiberglass intake (12a,12b).
: Wheel well (13a, 13b, 13c ).
: Main gear struts ( 14a, 14b).
: Nose gear truts.
: Wheels ( 16a, 16b).
12
13
14
15
16
: Door gear.
17
: Ply Wood part for the rear bottom fuselage ( 18a, 18b ).
18
: Plastic air intake for cooling ESC ( 20a, 20b ).
20
: Ply Wood part for rudder stab.
19
19
13c 13a
13b
8a
8b 8c
Nose gear Main gear
15
14b
16a
16b
14a
11
4
6
5
7
1
2b 9b
9a
2a
3a
3b
18b
20b
20a
10a
2x10mm Tp Screw
- - - - 28
3mm Flat Washer
- - - - - - - 14
- - - - - - - 14
Ball link
- - 4
- - 2
3x12mm Cap Screw
- - - - - 14
- - - - - 14
3x40mm Push rod
- - 1
2x40mm Push rod
3x45mm Push rod
3mm Hex Nut
3x6mm Button Screw
- - 8- - - - - -
5x35mm Socket Head
Cap Screw
- - - - - 3
5mm Flat washer
- - - - - 3
Cable rod - - 2
- - - 2
Metal Clevis
- - - - - 4
- - - - - 4
Cab link
- - - - - 2
- - - - - 2
3mm Hex Nut
- - - 12
3x20mm Cap screw
- - - 6
Pinned hinge
- - - 18
Pinned hinge
- - - - - - - 7
- - - - - - - 2
Horn
Plastic air intake for
cooling ESC
- - - - - - - 14
Aluminum ball
12b
12a
10b
17
18a

Flap
Aileron
Viper Jet MKII Item code: BH175 Instruction Manual
8
INSTALLING THE AILERONS AND FLAPS
Bottom view
- - - - - - - - - - - - - 6
- - - - - - - - - - - - - 6
Pinned hinge
Main Wing
Make certain the hinges are adequately secured with glue. If
they come loose in flight accidents may result.
Assemble left and right
sides the same way.
Apply epoxy glue
Cut off shaded portion

Viper Jet MKII Item code: BH175 Instruction Manual
9
INSTALLING THE AILERON AND FLAP SERVO
Assemble left and right
sides the same way.
Cut off shaded portion
1. Install the rubber grommets and brass eyelets
onto the aileron servo.
4. 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, remove the
masking tape and the servo lead from the
thread.
5. Place the aileron servo tray / hatch into the
servo box on the bottom of the wing and drill
pilot holes through the tray and the servo box
for each of the four mounting screws. Secure
the servo tray in place using the mounting
screws provided .
6. Repeat step # 2 - # 5 to install the second
aileron servo in the opposite wing half.
2. Using a modeling knife, remove the covering
from over the pre-cut servo arm exit hole on the
aileron servo tray / hatch. This hole will allow
the servo arm to pass through when installing
the aileron pushrods
3. Place the servo into the servo tray. Center the
servo within the tray and drill pilot holes
through the block of wood for each of the four
mounting screws provided with the servo.
For Flap servo.
Bottom view
Flap
Aileron
For Aileron servo.
Left wing
Right wing

Viper Jet MKII Item code: BH175 Instruction Manual
10
Bottom view
Set all scerws securely. If they come
off during flight you will lose control
of your aircraft!
< Left Wing >
Flap Servo
< Right Wing >
o
60
Flap
o
90
Aileron
approx.16mm
2 mm
4
Aileron and
flap servos.
4
2x10mm Screw
2
For Flap.
For Aileron.
2
For Flap.
For Aileron.
Screw
1.5 mm
1.5 mm
2 m m
1.5 mm
2 x 10mm Tp Screw
- - - - 16
Warning!
2x10mm Tp Screw
Tie the string.
Pull out servo cord with string.
1
1
2
2
Aileron Servo
Aileron Servo
Flap Servo
Flap
Aileron
Assemble left and right
sides the same way.
The number of times
the same way Assembly
(in this case twice).
2
Drill holes using the stated.
(in this case 1.5mm ).
1.5mm
Pay close attention here.

Viper Jet MKII Item code: BH175 Instruction Manual
11
INSTALLING THE AILERON AND FLAP LINKAGES
B
Horn
4
Bottom view
3x45 mm Push rod - - 4
- - - - - - - 8
- - - - - - - 8
- - - - - - - 8
- - - - - - - 8
- - - - - - - 4
- - - - - - - 8
Aluminum ball
3mm Flat Washer
Horn
3mm Hex Nut
3 x 12mm Cap Screw
3x45mm
Aluminum ball
Aluminum ball
x4
Cut off shaded portion
Assemble left and right
sides the same way
The number of times
the same way Assembly
(in this case twice).
2
1. Install the control horn into the aileron and flap.
2. Locate the metal rod wire, screw the plastic link ball
onto the threaded end of the wire.
3. Plug the aileron and flap servo into the receiver and
center the servo. Install the servo arm onto the
servo. The servo arm should be perpendicular to the
servo and point toward the middle of the wing.
4. Center the aileron and hold it in place using a
couple of pieces of masking tape. Adjust the
linkage until the aileron and the servo arm are
both centered and then tighten the nut against.
Remember use thread locking compound to
secure.
5. Repeat step 1 - step 4 for the second aileron and
flap linkage.
BApply epoxy glue.

3x12mm
3mm Flat Washer
Viper Jet MKII Item code: BH175 Instruction Manual
12
Bottom view
Bottom view
Bottom view
Left Wing
Right Wing
x4
x4
3mm Hex Nut
3x12mm
3mm Hex Nut
3mm Flat Washer
Assemble left and right
sides the same way.
Apply threadlocker
(screw cement).
The number of times
the same way Assembly
(in this case twice).
2

Viper Jet MKII Item code: BH175 Instruction Manual
13
INSTALLING MAIN GEAR
43.70
30.70
41.00
51.00
4.20
30.60
92.20
24.10
48.50
2.50
9.75
5.10
21.00
12.00
ELECTRICGEARDIMENSIONALDETAIL(mm)
ELECTRIC NOT INCLUDED.
ONLY INCLUDING OLEO STRUTS.
Main gear
75mm Wheels.
5x35mm
5mm Washer
Screw
Screw
Main gear
3x4mm Setscrew
Wheel well
Door gear
- - - - - - - - - - - 2
- - - - - - - - 4
5x35mm Socket Head
Cap Screw
- - - - - - - 2
5mm Flat washer
3x6mm Button screw
- - - - - - - - 2
- - - 2
- - - 2
- - - - - - - - 8
- - - 8
3x20mm Cap screw
Must be purchased
separately!
Apply threadlocker
(screw cement).

Viper Jet MKII Item code: BH175 Instruction Manual
14
ELECTRIC GEAR RETRACTS
C . A
Screw
Bottom view
Bottom view
Close
Open
C . A
Apply instant glue
(C.A glue, super glue). Must be purchased
separately!
Cut off shaded portion
carefully.
Assemble left and right
sides the same way.

Viper Jet MKII Item code: BH175 Instruction Manual
15
Bottom view
19mm
118mm
3x20mm Screw
2. 5mm
Bottom view
Apply threadlocker
(screw cement).
Assemble left and right
sides the same way.
Drill holes using the stated.
(in this case 1.5mm ).
1.5mm

Viper Jet MKII Item code: BH175 Instruction Manual
16
Bottom view
Bottom view
3x6mm
Bottom view
3x4mm
Assemble left and right
sides the same way.

Viper Jet MKII Item code: BH175 Instruction Manual
17
Top view
Wing tip
Top view
Top view
BApply epoxy glue.
Assemble left and right
sides the same way.
Must be purchased
separately!

Viper Jet MKII Item code: BH175 Instruction Manual
18
Top view
INSTALLING HORIZONTAL STABILIZER
- - - - - - - - - - - - - 8
Pinned hinge
Bottom view
BApply epoxy glue.
Cut off shaded portion
carefully.
Assemble left and right
sides the same way.
Wing tip

Viper Jet MKII Item code: BH175 Instruction Manual
19
Bottom view
INSTALLING THE HORIZONTAL STABILIZER SERVO
1. Install the rubber grommets and brass eyelets
onto the aileron servo.
4. 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, remove the
masking tape and the servo lead from the
thread.
5. Place the horizontal stabilizer servo tray / hatch
into the servo box on the bottom of the wing
and drill pilot holes through the tray and the
servo box for each of the four mounting
screws. Secure the servo tray in place using
the mounting screws provided.
2. Using a modeling knife, remove the covering
from over the pre-cut servo arm exit hole on the
horizontal stabilizer servo tray / hatch. This
hole will allow the servo arm to pass through
when installing the aileron pushrods.
3. Place the servo into the servo tray. Center the
servo within the tray and drill pilot holes
through the block of wood for each of the four
mounting screws provided with the servo.
Assemble left and right
sides the same way.
Must be purchased
separately!

Viper Jet MKII Item code: BH175 Instruction Manual
20
o
90
approx.16mm
2 mm
22
2x10mm Screw
22
Screw
1.5 mm
1.5 mm
2 m m
1.5 mm
Bottom view
Set all scerws securely. If they come
off during flight you will lose control
of your aircraft!
2 x 10mm Tp Screw
- - - - 8
Warning!
2x10mm Screw
Bottom view
3mm
Assemble left and right
sides the same way.
Pay close attention here. Drill holes using the stated.
(in this case 1.5mm ).
1.5mm
The number of times
the same way Assembly
(in this case twice).
2
Cut off shaded portion
carefully.