Black Horse Model BH123 Owner's manual

Instruction Manual book
Made in Vietnam.
SPECIFICATION
ITEM CODE BH123.


 Wingspan : 1,800 mm 70.87 in.


 Length : 1,385 mm 54.53 in.


 Weight : 4.3 kg 9.46 Lbs.


 Radio : 08 channels.


 Servo : 09 servos


 Engine : 55 - 2 Stroke
15-20 CC Gas
Electric Motor: RIMFIRE.80
 Battery: 5-6 Cells-Li-Poly-18.5 -22.2V-5.500mAh
 Propeller: 15X 6
Speed control: 60A.

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GROB G-115E TUTOR T1 - Item code: BH123 . 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 GROB G-115 TUTOR T1.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.
If you are inexperienced with basic R/C flight we strongly recommend you contact your R/C supplier
and join your local R/C Model Flying Club. R/C Model Flying Clubs offer a variety of training
procedures designed to help the new pilot on his way to successful R/C flight. They will also be able
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.
Modelling knife.
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
COWLING.
Landing gear.....
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 air-
craft and to protect the table. Keep a couple of
jars or bowls handy to hold the small parts af-
ter you open the bag.
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.GROBG-115ETUTORT1 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 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 follow-
ing: paint thinner, C/A glue accelerator, C/A glue
debonder and acetone. Do not let these chemi-
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-
installed rudder.
(1) Horizontal stabilizer with pre-
installed elevator halves.
SUGGESTION.
NOTE.

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GROB G-115E TUTOR T1 - Item code: BH123 . Instruction Manual
Caution: this model is not a toy!
If you are a beginner to this type of powered model, please ask an experienced model flyer 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
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.
+ Make engine adjustments from behind the propeller only.Do not reach around the spinning propeler.
SAFETY PRECAUTION.
REPLACEMENT LARGE PARTS
B. B.
F.
D.
C.
E.
A.
G. D.
A. Cowling.
B. Wing panel(Right&Left).
C. Fuselage.
D. Horizontal stabilizer. G. Decal sheet.
E. Rudder
F. Aluminium wing dihedral brace.

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GROB G-115E TUTOR T1 - Item code: BH123 . Instruction Manual
1) Install the rubber grommets and brass
eyelets onto the aileron servos.
REPLACEMENT SMALL PARTS
3. Wheels.
2. Wheel pants.
6.Ply wood of Vertical stabilizer.
4. Nose gear set.
11. Spinner.
1. Aluminium landing gear(Right& Left).
7. Fuel Tank.
8. Tie wrap
10.Plastic parts bottom of Fuselage
5. Plastic parts for elevator and rudder
pushrod.
9. Electric motor ply of wood .
1. 1.
3. 3.
8.
2.
4.
5.
7.
10.
9.
11.
6.
a. b. c.
3x 15mm
I. AILERON.
1.INSTALLING THE AILERON SERVOS.
C/A glue
Aileron
Flap. Aileron
Bottom side

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GROB G-115E TUTOR T1 - Item code: BH123 . Instruction Manual
C/A glue
2) Using a modeling knife, remove the cov-
ering at possition show below.
C/A glue
Flap. C/A glue
C/A glue
C/A glue
C/A glue
Remove
covering
Bottom of wing.
C/A glue

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GROB G-115E TUTOR T1 - Item code: BH123 . Instruction Manual
Install aileron control horn as same
as picture below.
Secure.
thread
Electric wire
2x10mm.
INSTALLING THE AILERON
CONTROL HORN.
4. Drill 1,5mm pilot holes 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.
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.
5. 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.
Servo tray.
Aileron
control horn
Secure.

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GROB G-115E TUTOR T1 - Item code: BH123 . Instruction Manual
Repeat the procedure for the other wing
half.
Repeat the procedure for the other wing
half.
Installing the aileron linkages as pictures
below.
50 mm
M2
INSTALLING THE AILERON
LINKAGES.
Control horn.
A+B PLUS glue
A+B Epoxy
PLUS glue
1.INSTALLING THE FLAP SERVOS.
II. FLAP
Electric wire
2x10mm.

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GROB G-115E TUTOR T1 - Item code: BH123 . Instruction Manual
PARTSREQUIRED
 1) Assemble and mounting the wheel pants
as shown in the following pictures.
Bottom side
2.INSTALLING THE FLAP CONTROL HORN.
A+B Epoxy
PLUS glue
Installing the aileron linkages as pictures
below.
3.INSTALLING THE FLAP LINKAGES.
50mm
M2
Secure
Flap control
horn
Flap
control horn
INSTALLING THE MAIN LANDING GEAR.
Drill 5.2mm
hole
5x40 mm.
Mark point
5x40mm. 5x40mm.
3x15mm. 3x15mm.

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GROB G-115E TUTOR T1 - Item code: BH123 . Instruction Manual
2) A drop of C/A glue on the wheel collar
screws will help keep them from coming lose
during operation.
Remove wood
THERE ARE TWO OPTIONS:
1. ELECTRIC MOTOR
2. ENGINE MOUNT.
1. OPTION 1: ELECTRIC MOTOR
Secure.
3 x 15 mm.
Secure.
Repeat the process for the other wheel.
INSTALLING THE ENGINE MOUNT.
INSTALLING ELECTRIC MOTOR.
3x 15mm

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GROB G-115E TUTOR T1 - Item code: BH123 . Instruction Manual
3x 15mm
secure
secure
3x 15mm
Drill a hole
3mm diameter
Drill a hole
3mm diameter

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GROB G-115E TUTOR T1 - Item code: BH123 . Instruction Manual
INSTALLING THE ENGINE.
Front view
Front view
Secure
5x 70mm
See pictures below:
2. OPTION 2: ENGINE MOUNT
Drill a hole
6mm diameter
INSTALLING THE ENGINE MOUNT.
Battery

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GROB G-115E TUTOR T1 - Item code: BH123 . Instruction Manual
1. Install one adjustable metal connector
through the third hole out from the center of
one servo arm, enlarge the hole in the servo
arm using a 2mm drill bit to accommodate the
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.
Secure.
Right side.
INSTALLING THE THROTTLE - CABLE.
Throttle servo.
Electric power.
Throttle cable.
Throttle cable.
Throttle servo.

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GROB G-115E TUTOR T1 - Item code: BH123 . Instruction Manual
INSTALLING THE STOPPER ASSEMBLY
1) The stopper has been pre-assembled
at the factory.
2) Using a modeling knife, cut one length
of silicon fuel line (the length of silicon fuel line
is calculated by how the weighted clunk should
rest about 8mm away from the rear of the tank
and move freely inside the tank). Connect one
end of the line to the weighted clunk and the
other end to the nylon pick up tube in the stop-
per.
3) Carefully bend the second nylon tube
up at a 45 degree angle (using a cigarette
lighter). This tube will be the vent tube to the
muffler.
4) Carefully bend the third nylon tube down
at a 45 degree angle (using a cigarette lighter).
This tube will be vent tube to the fueling valve.
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.
6) When satisfied with the alignment of
the stopper assembly tighten the 3mm x 20mm
machine screw until the rubber stopper ex-
pands and seals the tank opening. Do not over
tighten the assembly as this could cause the
tank to split.
7) 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.
5) Test fit the stopper assembly into the
tank. It may be necessary to remove some of
the flashing around the tank opening using
a modeling knife. If flashing is present, make
sure none of it falls into the tank.
Secure
Front view.
FUEL TANK.
Tygon gas tubing not
included only use for
gasoline
silicon tube not included only
use for glow fuel.

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GROB G-115E TUTOR T1 - Item code: BH123 . Instruction Manual
Adjust the nose gear steering arm until the
arm is parallel with the fire wall.
Installing steering arm as follow
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.
Blow through one of the lines to ensure
the fuel lines have not become kinked inside
the fuel t ank comp artment. Air should flow
through easily.
9) To secure the fuel tank in place, apply a
bead of silicon sealer to the forward area of
the tank, where it exits the fuselage behind the
engine mounting box and to the rear of the tank
at the forward bulkhead.
8) 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, the front of the tank should just about
touch the back of the firewall.
Tie wrap.
Tie wrap.
Fuel Tank.
NOSE GEAR INSTALLATION.
3 x 20 mm.
Secure.
3 x20 mm.
Right side.

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GROB G-115E TUTOR T1 - Item code: BH123 . Instruction Manual
Steering arm
SERVO NOSE GEAR INSTALLATION.
Bottom side.
Secure.

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GROB G-115E TUTOR T1 - Item code: BH123 . Instruction Manual
1. Slide the fiberglass cowl over the en-
gine and line up the back edge of the cowl with
the marks you made on the fuselage.
COWLING.
Top side
Pushrod wire.
connector.
Servo arm
Connector.
Secure.
Bottom side.

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GROB G-115E TUTOR T1 - Item code: BH123 . Instruction Manual
Mark point 1.
center line 1
Mark point 2.
Center line 2.
2. While keeping the back edge of the
cowl flush with the marks, align the front of
the cowl with the crankshaft of the engine. 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.
4. Install the muffler and muffler extension
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.
3. Slide the cowl back over the engine
and secure it in place using four wood screws.
See picture below.
center line 2
center line 1
Trim and cut.

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GROB G-115E TUTOR T1 - Item code: BH123 . Instruction Manual
Drill 2.5mm hole.
3x12mm
Secure.
Right side
Machine screw
Install the spinner backplate, propeller and
spinner cone. The spinner cone is held in
place using two 3mm x 12mm wood screws.
INSTALLING THE SPINNER.

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GROB G-115E TUTOR T1 - Item code: BH123 . 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 sys-
tem.
Elevator servo.
180 mm
9 mm
See pictures below:
Bottom side.
Elevator servo.
Elevator servo.
HORIZONTAL STABILIZER.
Secure.
Secure.
ELEVATOR INSTALLATION.
SERVO INSTALLATION.

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GROB G-115E TUTOR T1 - Item code: BH123 . Instruction Manual
Epoxy glue.
C/A glue.
Bottom side.
Elevator control horn install as same as the
way of aileron control horn. Please see pic-
tures below.
ELEVATOR CONTROL HORN INSTALLA-
TION.
Epoxy glue.
elevator
control horn.