Black Horce Model L-39 Albatros BH141 User manual

Instruction Manual book
SPECIFICATION


Wingspan: 1,450mm 57.09 in.


Length : 1,860 mm 73.23 in.


Weight : 4.6-4.9 kg 10.12-10.78 Lbs.
Parts listing required (not included).


Radio : 08 channels.


Servo : 08 size (29 x 13 x 30) mm.


EDF:DS51-AXI-HDS90mm10BladeImpeller


Motor: HET 700-68 - 1200KV


Battery:2 Packs x 5 Cells LIPO 37V-5,000mAH 50c.


(Or)EDF:90MMMIDI-FAN EVO/HET650-68-1.500KV


Battery:8S-LIPO-29,6V-6,000mAh.


Speed control: 120A MadeinVietnam.
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
proceduresdesignedto help thenewpilotonhiswaytosuccessful R/C flight. Theywillalsobeable
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.....
To avoidscratching yournew airplane, donot
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 to protect thetable.Keepa 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-
installedelevatorhalves.
SUGGESTION.
NOTE.
Pleasetrialfit all theparts.Makesureyouhave
the correct parts and that they fit and are
alignedproperlybeforegluing!Thiswillassure
proper assembly.L-39 ALBATROS ARF is
handmadefromnatural 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
debonderand acetone. 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!
Ifyou are abeginner to thistype of poweredmodel,please ask anexperienced model flyerfor 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 tocarryout is importantand must bedone carefully.The model willonly be 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
5.wirecable(nosegear)
3.Plastic parts of tail fuselage.
1.Oleo struts retracts.
2.Oleostrutsretract nose gear. 4.Plywood of nose gear
F.Aluminium tube Horizontal stabilizer.
B. Wing panel (B1,B2).
A.Fuselage.
C. Horizontal stabilizer(D1,D2).
D. Vertical stabilizer.
E.Aluminium tube wing dihedral brace. G. Decal sheet.
K.Pilot

5
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)Usinga modeling knife, removethecov-
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)Drill 1,6mm pilot holesthroughtheblock
of wood for each of the four mounting screws
provided with the servo.
Servotray.
Secure.
thread
Electric
wire.
Bottom side.
Aileron
Flap
Remove
covering
Servotray.
Servotray.

6
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.

7
L-39 ALBATROS Item code: BH141 . Instruction Manual
II. FLAP
1.INSTALLING THE FLAP SERVO
2x10mm.
Secure
Electric
wire.
Repeat the procedure for the other wing
half.
Installflapcontrolhornassameas
picturebelow.
ControlhornFlap.
2.INSTALLING THE FLAP
CONTROL HORN.
thread
Electric
wire.
servo tray.
Flap.

8
L-39 ALBATROS Item code: BH141 . Instruction Manual
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
Repeat the procedure for the other wing
half.
Bottom side.
Flap.
Aileron.
PARTSREQUIRED
Electric retract
(notincluded)
(Electric
Not Included.)
3x15mm.
Onlyincludingoleostruts.
INSTALLING ELECTRIC GEAR
RETRACTS.

9
L-39 ALBATROS Item code: BH141 . Instruction Manual
3x15mm
Secure.
Secure.
Repeat the procedure for the other gear.
4x12mm
Bottom side
Seepicturesbelow:
(Notincluded)
INSTALLINGELECTRICEDF-90MM.

10
L-39 ALBATROS Item code: BH141 . Instruction Manual
Open
Bottom side
3x 12mm
Secure.
.Plastic parts of tail fuselage.

11
L-39 ALBATROS Item code: BH141 . Instruction Manual
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.
Horizontalstabilizerinstallation.
See picture below.
HORIZONTALSTABILIZER.
ELEVATOR SERVO INSTALLATION.
A+B Epoxy
PLUSglue.
Left side
Elevator
servo
Servotray
Bottomside
2x10mm.
Secure.
Right horizontal
stabilizer

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L-39 ALBATROS Item code: BH141 . Instruction Manual
Secure.
Left horizontal
stabilizer
Elevator control horn install as same as the
way of aileron control horn. Please see pic-
tures below.
A+B Epoxy
PLUSglue.
ELEVATOR CONTROL HORN
INSTALLATION.
Controlhornofelevator.
 Elevatorpushrodinstall as sameas theway
of aileron pushrod.
60 mm.
M2
ELEVATOR PUSHROD INSTALLATION.
Elevator
control horn
Right side
Elevator
pushrod
Leftside.
Rightside.
Bottom side
Aluminiumtube.
8mm
215 mm

13
L-39 ALBATROS Item code: BH141 . Instruction Manual
Left side.
Epoxyglue.
C/Aglue.
Left side
Elevatorpushrod Elevatorpushrod
Bottom side.
Top side.
C/Aglue.
Epoxy
glue.
Right side.

14
L-39 ALBATROS Item code: BH141 . Instruction Manual
VERTICAL INSTALLATION
See picture below:
Rudder servo install as same as method of
elevatorservo.
See picture below:
Rudderservo
2x10mm.
Secure.
Rudder control horn install as same as the
way of aileron control horn. Please see pic-
tures below.
RUDDER CONTROL HORN INSTALLA-
TION.
ControlhornofRudder.
A+BEpoxy
PLUS glue.
Control Rudder.

15
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
Seepicturebelow:
INSTALLING ELECTRIC NOSE GEAR
RETRACT.
Only Including Oleo Strut Nose Gear.
( Electric
Not Included.)
3x15mm
3x10mm
2x8mm
Secure
2x8mm.
Secure
3x10mm.

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L-39 ALBATROS Item code: BH141 . Instruction Manual
wire cable.
Secure
wire cable.
wire cable.
Open.
Seepicturebelow:
3x15mm
Servo
nose gear
INSTALLING SERVO NOSE GEAR.

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L-39 ALBATROS Item code: BH141 . Instruction Manual


3. Position the battery pack and receiver
is as picture below.
Do not permanentlysecure thereceiverand
battery until after balancing the model.


1. Plug the servo leads and the switch
leadintothe receiver. You may want to plug
anaileron extensioninto 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.
Ply wood of nose gear.
INSTALLINGTHEESC-RECEIVERANDBATTERY.
Servo
nose gear


2. Wrap the receiver and battery pack in
the protective foam to protect them from vi-
bration.Use a rubber bandormasking tape to
hold the foam in place.
C/Aglue.
Rudder
cable.


4. Using a 2mmdrillbit, drill a holethrough
the side of the fuselage, near the receiver, for
the antenna to exit.
Tie wrap.
ESC
Battery EDF
Battery
Receiver.

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L-39 ALBATROS Item code: BH141 . Instruction Manual
Receiver.
INSTALLING COCKPIT FUSELAGE .
See picture below:
Pilot
A+BEpoxy
PLus glue
WINGATTACHMENT.
Top side
510mm.
12mm
Aluminium tube.
1.Locate the aluminium wing dihedral
brace.
*** Test fit the aluminium tube dihedral brace
into each wing haft. The brace should slide in
easily. If not, use 220 grit sand around the
edges and ends of the brace until it fits prop-
erly.

20
L-39 ALBATROS Item code: BH141 . Instruction Manual
3.Insert two wing panels as pictures below.
Left wing.
Right wing.
Bottom side
Secure.
Secure.
Bottom side.
Bottom side
2. Attach the aluminium tube into the
fuselage.