Black Horse Model ZLIN 50LS Owner's manual

SPECIFICATION
MadeinVietnam.
1Wingspan: 1,700 mm 66.93 inches.
1Length : 1,300 mm 51.18 inches.
1Weight : 3.4 kg 7.48 lbs.
1Radio : 04 channels.
1Servo : 05 servos.
1Glow Engine: 55 2 stroke; 72 4 stroke.
Parts listing required (not included).
1 Electric Motor: O.S.(OMA-5020-490).
1Battery: 5-6 Cells-Li-Poly-18.5-22.2V-5.500mAh.
1Speed control: 80A.
1Propeller: 14 x 8.
Instruction Manual Book
ITEM CODE:BH116.

ZLIN 50LS -
Item code: BH116
.
Instruction Manual
2
This instruction manual is designed to help you build a great flying aeroplane. Please read this
manualthoroughlybeforestartingassemblyofyour ZLIN50LS.Usethepartslistingbelowtoidentify
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
proceduresdesignedtohelpthenewpilotonhiswaytosuccessfulR/Cflight.Theywillalsobeable
to advise on any insurance and safety regulations that may apply.
TOOLS & SUPPLIES NEEDED.
1Thick cyanoacrylate glue.
130 minute epoxy.
15 minute epoxy.
1Hand or electric drill.
1Assorted drill bits.
1Modellingknife.
1Straightedge ruler.
12mm ball driver.
1Phillips head screwdriver.
1220 grit sandpaper.
190° square or builder’s triangle.
1Wire cutters.
1Masking tape & T-pins.
1Thread-lock.
1Paper towels.
Some more parts.
HARDWARE PACK
COWLING.
Landinggear.....
Toavoidscratching 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
aircraftandto protectthetable. Keepacouple
of jars or bowls handy to hold the small parts
after you open the bag.
Pleasetrial fitalltheparts.Makesureyouhave
the correct parts and that they fit and are
alignedproperlybefore gluing!Thiswill assure
properassembly. ZLIN 50LS ARF ishandmade
from natural materials, every plane is unique
andminoradjustmentsmay have to bemade.
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.
PARTS LISTING.
FUSELAGE ASSEMBLY
1(1) Fuselage.
WING ASSEMBLY
1(1) Right wing half with pre-installed
aileron.
1(1) Left wing half with pre-installed
aileron.
Tail section assembly
1(1) Vertical stabilizer with pre-
installedrudder.
1(1) Horizontal stabilizer with pre-
installedelevator halves.
SUGGESTION.
NOTE.

3
ZLIN 50LS -Item code: BH116.Instruction Manual
Caution: this model is not a toy!
Ifyouarea beginner to this typeofpoweredmodel, please ask anexperiencedmodelflyerfor 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
instructionsandcheckallthe kit components against thepartslist.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!donotheat the film more thanisabsolutelynecessary. 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
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.
+ 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.
+Makeengine adjustments frombehindthepropeller only.Do notreacharound the spinningpropeler.
SAFETY PRECAUTION.
B.
C.
D.
D.
A.
B.
F.
E.
G.
F. Aluminium wing
dihedral brace.
G. Decal sheet .
A.Cowling.
B.Wing panel.
C. Fuselage
D.Horizontal stabilizer.
E. Rudder.

ZLIN 50LS -
Item code: BH116
.
Instruction Manual
4
3. Wheels.
2.Aluminium landinggear.
7. Plastic parts for elevator and rudder pushrod.
6.Spinner.
1 1. Install the rubber grommets and brass
eyelets onto the aileron servo.
4. Plastic- Engine mount.
8. Tail gear set.
5.FuelTank.
1. Wheel pants.
REPLACEMENT SMALL PARTS
I. INSTALLING THE AILERON SERVO
Aileron.
Bottom side
Aileron.
Cutthe covering
awayfromtheslot.
4x30mm.
3x20mm.
3x15mm.
5x40mm.
3x12mm
8

5
ZLIN 50LS -Item code: BH116.Instruction Manual
12)Usinga modelingknife,removethe cov-
ering at possition show below.
14.Drill1,5mmpilotholes through the block
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.
13. 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.
Electricwire
Bottomside.
Thread
Repeat the procedure for the other wing
half.
INSTALLINGTHEAILERON CONTROL HORN
.
Installaileron control hornassame as
picturebelow.
A+B Epoxy
PLUS glue
Temporary pin to
keep hinge centered.
Assemble then apply drops of thin
C/A to center of hinge,on both sides.
Aileron.
Bottom side

ZLIN 50LS -
Item code: BH116
.
Instruction Manual
6
Repeat the procedure for the other wing
half.
Aileron Control
horn.
11. Working with the aileron linkage for
now, thread one clevis onto one of the
threaded wires.
12. Attach the clevis to the outer hole in the
control horn. Install a silicone tube on the
clevis.
INSTALLING THE AILERON
LINKAGES.
Attach the clevis to the outer hole in the con-
trol horn.
13. Plug the aileron servo into the receiver
andcenter theservo. Installthe servoarm onto
the servo. The servo arm should be perpen-
dicular to the servo and point toward the mid-
dle of the wing.
16.Insert the90 degree bend down through
the hole in the servo arm. Install one nylon
snap keeper over the wire to secure it to the
arm.Install theservoarm retainingscrewand
remove the masking tape from the aileron.
Bend and
cut after.
14. 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.
15.Usingpliers,carefullymake a 90 degree
bend down at the mark made. Cut off the ex-
cess wire, leaving about 4mm beyond the
bend.
M2 clevis.
M2locknut. Snap keeper.

7
ZLIN 50LS -Item code: BH116.Instruction Manual
Repeat the procedure for the other wing
half.
THERE ARE TWO OPTIONS:
1. ELECTRIC MOTOR
2. ENGINE MOUNT.
1. OPTION 1: ELECTRIC MOTOR
INSTALLING ELECTRIC MOTOR.
Drill a hole
4mmdiameter.
Aileron servo
Aileron
Bottom side
50mm
50mm
Cut.
220 mm
Aluminium tube.
4 x 60 mm

ZLIN 50LS -
Item code: BH116
.
Instruction Manual
8
Front view.
Secure.
Motor.
Battery.
Push
Secure.
Rotor sharft.
Battery tray.

9
ZLIN 50LS -Item code: BH116.Instruction Manual
2. OPTION 2: ENGINE MOUNT.
11) Slide the cowl over the motor and line
up the back edge of the cowl with the marks
you made on the fuselage.
COWLING.
13) Slide the cowl back over the motor.
12) While keeping the back edge of the
cowl flush with the marks, align the front of
thecowlwiththe crankshaft of themotor. 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.
See pictures below:
INSTALLING THE ENGINE MOUNT.
Frontview.
Drill a hole
4mm diameter.
4x30mm
3x20mm

ZLIN 50LS -
Item code: BH116
.
Instruction Manual
10
Markpoint.
Markpoint.
119mm
Markpoint.
Drill a hole
2mm diameter.
Secure.
Secure.
3 x 20mm

11
ZLIN 50LS -Item code: BH116.Instruction Manual
11. Install one adjustable metal connector
through the third hole out from the center of
one servo arm, enlarge the hole in the servo
armusinga2mm drill bit toaccommodatethe
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 CABLE. Connector.
Throttle servo
Secure
Pushrod
wire
Pushrod wire
Throttle servo

ZLIN 50LS -
Item code: BH116
.
Instruction Manual
12
Fuel tank.
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.
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.
16. When satisfied with the alignment of the
stopper assembly tighten the 3mm x 20mm
machine screw until the rubber stopper ex-
pandsandseals thetank opening.Donot over
tighten the assembly as this could cause the
tank to split.
17. 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.
18. 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,thefront ofthe tankshouldjust about
touch the back of the firewall.
Secure.
19. To secure the fuel tank in place, apply a
bead of silicon sealer to the forward area of
thetank,where itexitsthe fuselagebehindthe
enginemounting boxand tothe rearof thetank
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
through easily.
FUEL TANK.
INSTALLING THE STOPPER ASSEMBLY
11.Thestopperhas been pre-assembledat
the factory.
Vent tube Fuel pick- up tube
Fuelfilltube
13.Carefullybendthe second nylontubeup
ata45 degreeangle (usingacigarette lighter).
This tube will be the vent tube to the muffler.
14.Carefullybendthethird nylon tube down
ata45 degreeangle (usingacigarette lighter).
This tubewillbe venttubeto the fuelingvalve.
(Silicon tube not included)
Silicon tube.
12.Usingamodeling knife, cut onelengthof
siliconfuelline(the length ofsiliconfuelline is
calculated by how the weighted clunk should
restabout8mmaway from therearofthe tank
andmovefreelyinside the tank).Connectone
end of the line to the weighted clunk and the
otherendto the nylon pickuptube in thestop-
per.

13
ZLIN 50LS -Item code: BH116.Instruction Manual
11. Slide the fiberglass cowl over the en-
gineandline uptheback edgeof thecowlwith
the marks you made on the fuselage.
COWLING.
Top side
12. While keeping the back edge of the
cowl flush with the marks, align the front of
thecowlwiththecrankshaft oftheengine. 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.
14. Installthe mufflerandmufflerextension
onto the engine and make the cutout in the
cowl for muffler clearance. Connect the fuel
and pressure lines to the carburetor, muffler
and fuel filler valve.
13. Slide the cowl back over the engine
andsecureit in placeusingfour woodscrews.
See picture below.
Tie wrap.
Trim and
cut
Bottom side.
3 x 12mm
Drill a hole
2mm diameter.

ZLIN 50LS -
Item code: BH116
.
Instruction Manual
14
Install the spinner backplate, propeller and
spinner cone. The spinner cone is held in
place using two 3mm x 12mm wood screws.
Secure.
Machine screw.
Front view.
INSTALLING THE SPINNER.
Secure.
Secure.
3x15mm

15
ZLIN 50LS -Item code: BH116.Instruction Manual
11. Install the rubber grommets and brass
collets into the elevator servo. Test fit the
servo into the servo tray.
12. Mount the servo to the tray using the
mounting screws provided with your radio
system.
INSTALLING THE ELEVATOR
SERVO.
HORIZONTAL STABILIZER.
Elevator servo
133 mm
9mm
Elevator servo
Top side
Installing CA Hinges for the
Horizontal stabilizer
Cutthe covering
awayfromtheslot.
Assemble then apply drops of thin
C/A to center of hinge,on both sides.
Push
Temporary pin to
keep hinge centered.

ZLIN 50LS -
Item code: BH116
.
Instruction Manual
16
Elevator control horn install as same as the
way of aileron control horn. Please see pic-
tures below.
Bottom side.
C/Aglue.
Epoxy glue.
ELEVATOR CONTROL HORN AND
ELEVATOR PUSHROD INSTALLATION.
A+ B Epoxy
PLUSglue
Epoxy glue.

17
ZLIN 50LS -Item code: BH116.Instruction Manual
Elevatorpushrodinstall as sameasthe way
of aileron pushrod.
ELEVATOR PUSHROD INSTALLATION.
Elevator
cotrolhorn
Elevator
pushrod
Bottomside.
Elevator pushrod
Elevator pushrod
Cut.
M2
M2 lock nut.
M2
M2 lock nut.

ZLIN 50LS -
Item code: BH116
.
Instruction Manual
18
Plastic parts of elevator
pushrod.
Cut.
HORIZONTAL STABILIZER STRUTS.
3x15mm.
Secure
3x15mm.
Secure.
Secure.
Secure.

19
ZLIN 50LS -Item code: BH116.Instruction Manual
Rudder servo
C/Aglue
Bottom side.
Rudder servo
Installing CA Hinges for the
Rudder
Cutthe covering
awayfromtheslot.
Temporary pin to
keep hinge centered.
Assemble then apply drops of thin
C/A to center of hinge,on both sides.
See picture below:
Rudder servo install as same as method of
elevator servo. See picture below:
RUDDER INSTALLATION.

ZLIN 50LS -
Item code: BH116
.
Instruction Manual
20
Rudder control horn install as same as the
way of aileron control horn. Please see pic-
tures below.
ControlhornofRudder.
RUDDER CONTROL HORN INSTALLA-
TION.
A+B Epoxy
PLUSglue
Rudder
control
RUDDER PUSHROD INSTALLATION.
Rudder pushrod install as same as the way
of aileron pushrod.
M2 M2 lock nut.
Rudder servo