Black Horce Model L-39 Albatros BH 141 Owner's manual

Instruction Manual book
SPECIFICATION


Wingspan: 1,450mm 57.09 in.


Length : 1,860 mm 73.23 in.


Weight : 4.3-4.6 kg 9.46-10.12 Lbs.


Radio : 08 channels.


Servo : 08 miniservos+3servosretracts(FUTABA,S3170G).


EDF:90MMMIDI-FANEVO/HET650-68-2000


Battery:6S-LIPO-22.2V-5,500-7,200mAh


Speed control: 120A
Madein Vietnam.
ITEM CODE:BH 141

2
L-39 ALBATROS Item code: BH141 . Instruction Manual
This instruction manual is designed to help you build a great flying aeroplane. Please read this
manualthoroughlybeforestartingassemblyofyourL-39ALBATROS.Usethepartslistingbelow
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
proceduresdesignedtohelp thenew pilotonhiswaytosuccessfulR/C flight.They willalso 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
Landinggear.....
Toavoid 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 air-
craftandto protect the table. Keep a couple of
jars or bowls handy to hold the small parts af-
ter you open the bag.
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.
Pleasetrialfitall theparts. Makesureyouhave
the correct parts and that they fit and are
alignedproperly before gluing!Thiswill assure
proper assembly.L-39 ALBATROS ARF is
handmade fromnatural materials,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.

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L-39 ALBATROS Item code: BH141 . Instruction Manual
Caution:
this model is not a toy!
Ifyouare a beginner to this type of powered model, please ask an experienced modelflyer for 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
youhave to carry out is important and must bedone carefully.The modelwill onlybe strongand 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.
SAFETY PRECAUTION.
+ 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.

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L-39 ALBATROS Item code: BH141 . Instruction Manual
REPLACEMENT LARGE PARTS
REPLACEMENT SMALL PARTS
4. Wheels
1. Retract main gear. 6.wirecable(nosegear)
2. Retract nose gear. 3.Plastic parts of
tailfuselage. 5. Ply wood nose gear.
F. Carbon tube Horizontal stabilizer.
B. Wing panel (B1,B2).
A.Fuselage.
C. Horizontal stabilizer(D1,D2).
D. Vertical stabilizer.
E. Carbon tube wing dihedral brace. G. Decal sheet.
K.Pilot

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L-39 ALBATROS Item code: BH141 . Instruction Manual
1) Install the rubber grommets and brass
eyelets onto the aileron servos.
I. AILERON.
1.INSTALLING THE AILERON SERVOS.
2)Using a modeling knife, remove thecov-
ering at possition show below.
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.
4)Drill1,6mm pilot holes through the block
of wood for each of the four mounting screws
provided with the servo.
Aileron
Flap
Servotray.
Remove
covering
Servotray.
Secure.
thread
Electric
wire.
Top side

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L-39 ALBATROS Item code: BH141 . Instruction Manual
Repeat the procedure for the other wing
half.
Aileroncontrolhorn
Repeat the procedure for the other wing
half.
5. Instal servo tray with aileron servo into
the wing as same as picture below.
Installing the aileron linkages as pictures
below.
INSTALLINGTHEAILERON CONTROLHORN.
Secure.
A+B Epoxy
PLUS glue
Aileron
control horn
INSTALLING THE AILERON
LINKAGES.
60 mm.
M2
Bottom side
Aileron.
2x10mm.

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L-39 ALBATROS Item code: BH141 . Instruction Manual
II. FLAP
1.INSTALLING THE FLAP SERVO
2x10mm.
Flap.
Secure
Electric
wire.
Repeat the procedure for the other wing
half.
Installflapcontrol horn assameas
picturebelow.
ControlhornFlap.
2.INSTALLING THE FLAP
CONTROL HORN.
thread
Electric
wire.
servo tray.

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L-39 ALBATROS Item code: BH141 . Instruction Manual
Repeat the procedure for the other wing
half.
See pictures below:
Installing the flap linkages as pictures
below.
3.INSTALLING THE FLAP
LINKAGES.
A+B Epoxy
PLUS glue
Control horn
of the flap.
60 mm.
M2
Bottom side.
Flap. Aileron.
INSTALLING RETRACT SERVOS.
Top side
Retract
servos

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L-39 ALBATROS Item code: BH141 . Instruction Manual
PARTSREQUIRED
INSTALLING RETRACTABLE LANDING
GEAR.
Bottom side.
Topside
Retract
servos
3x15mm
5x30mm
connector.

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L-39 ALBATROS Item code: BH141 . Instruction Manual
Secure.
Secure.
3x15mm.
5x30mm
Secure.
See pictures below:
INSTALLING THE RETRACT PUSHROD.

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L-39 ALBATROS Item code: BH141 . Instruction Manual
Cut.
2x10mm.
Secure
Repeat the procedure for the other gear.
Seepictures below:
(Notincluded)
INSTALLINGELECTRICEDF-90MM.
Bottom side
Open
Bottom side
retract pushrod

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L-39 ALBATROS Item code: BH141 . Instruction Manual
3x 12mm
Secure.
Left side
A+B Epoxy
PLUSglue.
.Plastic parts of tail fuselage.

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L-39 ALBATROS Item code: BH141 . Instruction Manual
Elevator
servo
1. Install the rubber grommets and brass
collets into the elevator servo. Test fit the
servo into the servo tray.
2. Mount the servo to the tray using the
mounting screws provided with your radio
system.
Bottomside
Elevator control horn install as same as the
way of aileron control horn. Please see pic-
tures below.
ELEVATOR CONTROL HORN
INSTALLATION.
Controlhornofelevator.
HORIZONTALSTABILIZER.
ELEVATOR SERVO INSTALLATION.
Horizontalstabilizerinstallation .
See picture below.
2x10mm.
Secure.
Right horizontal
stabilizer
Secure.
Left horizontal
stabilizer
Servotray

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L-39 ALBATROS Item code: BH141 . Instruction Manual
 Elevatorpushrodinstall as same as the way
of aileron pushrod.
Elevator
control horn
Right side
Elevator
pushrod
Leftside.
Rightside.
Bottom side
ELEVATOR PUSHROD INSTALLATION.
60 mm.
M2
Horizontal stabilizer installation
See picture below.
HORIZONTAL STABILIZER.
carbon tube.
215 mm
8mm
A+B Epoxy
PLUSglue.

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L-39 ALBATROS Item code: BH141 . Instruction Manual
Epoxyglue.
Left side
C/Aglue.
C/Aglue.
Left side.
Epoxy
glue.
Right side.
VERTICAL INSTALLATION
Top side.
Elevatorpushrod Elevatorpushrod
Bottom side.
See picture below:

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L-39 ALBATROS Item code: BH141 . Instruction Manual
Rudder control horn install as same as the
way of aileron control horn. Please see pic-
tures below.
Controlhorn ofRudder.
RUDDER CONTROL HORN INSTALLA-
TION.
Rudder servo install as same as method of
elevatorservo.
See picture below:
Rudderservo
2x10mm.
Secure.
A+BEpoxy
PLUS glue.
Control Rudder.

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L-39 ALBATROS Item code: BH141 . Instruction Manual
RUDDER PUSHROD INSTALLATION.
 Rudder pushrod install as same as the way
of aileron pushrod.
60mm.
Top side.
Rudder pushrod.
Epoxy glue
C/Aglue.
Rudder
pushrod.
Top side.

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L-39 ALBATROS Item code: BH141 . Instruction Manual
Top side
Seepicture below:
INSTALLING RETRACT SERVO
NOSE GEAR.
Seepicture below:
INSTALLING RETRACT NOSE GEAR.
Retract servo
nose gear
Retract servo
nose gear
Secure
3x15mm.
5x30mm
3x15mm

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L-39 ALBATROS Item code: BH141 . Instruction Manual
Secure.
wire cable.
wire cable.
wire cable.
Seepicture below:
INSTALLING SERVO NOSE GEAR.
Servo
nose gear
Open.
Secure
Retract pushrod
(nose gear)

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L-39 ALBATROS Item code: BH141 . Instruction Manual


4. Usinga2mm drill bit, drill a hole through
the side of the fuselage, near the receiver, for
the antenna to exit.
Servo
nose gear
Rudder
cable.
Ply wood of nose gear.
C/Aglue.


3. Position the battery pack and receiver
is as picture below.
Do not permanentlysecurethereceiverand
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.Usearubber band or masking tape to
hold the foam in place.
Tie wrap.
INSTALLINGTHEESC-RECEIVERANDBATTERY.
ESC
Battery EDF