1/4 Sbach 342 1.20 GP EP ARF Manual

16 mm flat washer
32
I/C FLIGHT GUIDELINES
Made in Vietnam
When ready to fly, first extend the
transmitter aerial.
Operate the control sticks on the
transmitter and check that the control
surfaces move freely and in the
CORRECT directions.
ALWAYS land the model INTO the
wind, this ensures that the model lands
at the slowest possible speed.
Switch on the transmitter.
Switch off the transmitter.
Check that the transmitter batteries
have adequate power.
Switch off the receiver.
Switch on the receiver.
ALWAYS take off into the wind.
Check that the wings are correctly
fitted to the fuselage.
If the model does not respond correctly
to the controls, land it as soon as
possible and correct the fault.
Empty the fuel tank after flying, fuel left
in the tank can cause corrosion and
lead to engine problems.
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SBACH
Instruction Manual
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Switch
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2. Wrap the receiver and battery pack in the
protective foam to protect them from vibration.
Use a rubber band or masking tape to hold the
foam in place.
3. Position the battery pack and receiver in place
and using the two zip ties for mounting them as
the picture below.
4. Using a 2mm drill bit, drill a hole through the
side of the fuselage, near the receiver, for the
antenna to exit.
Battery
Zip tie
Receiver
Switch
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Engine head
Carburator
Muffler
FINAL ASSEMBLY
INSTALLING THE SPINNER
. Install the spinner back-plate, propeller and
spinner cone. The spinner cone is held in place
using two 3mm x 20mm wood screws.
. The propeller should not touch any part of the
spinner cone. If it dose, use a sharp modeling
knife and carefully trim away the spinner cone
where the propeller comes in contact with it.
INSTALLING THE SWITCH
1. The switch should be mounted on the fuselage
side, opposite the muffler, close enough to the
receiver so the lead will reach. Use the face
plate of the switch cut out and locate the
mounting holes.
2. Cut out the switch hole using a modeling knife.
Use a 2mm drill bit and drill out the two
mounting holes through the fuselage side.
3. Secure the switch in place using the two
machine screws provided with the radio
system.
INSTALLING THE RECEIVER AND BATTERY
1. Plug the servo leads and the switch lead into
the receiver. You may want to plug an aileron
extension into 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.
Secure
the cowl
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Instruction Manual
INSTALLING THE MAIN LANDING GEAR
1. Nuts have been installed at the factory.
2. Install main landing gear into the fuselage using
(4) 4mm x 20mm socket head screws and flat
washers provided in the kit.
INSTALLING THE WHEEL PANTS
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Instruction Manual
115mm
BALANCING
1. It is critical that your airplane be balanced
correctly. Improper balance will cause your
plane to lose control and crash.
THE CENTER OF GRAVITY IS LOCATED
115mm BACK FROM THE LEADING EDGE
OF THE WING, AT THE FUSELAGE.
BALANCE A PLANE UPSIDE DOWN WITH
THE FUEL TANK EMPTY.
2. Mount the wing to the fuselage. Using a couple
of pieces of masking tape, place them on the
top side of the wing 115mm back from the
leading edge, at the fuselage sides.
3. Turn the airplane upside down. Place your
fingers on the masking tape and carefully lift
the plane .
4. If the nose of the plane falls, the plane is nose
heavy. To correct this first move the battery
pack further back in the fuselage. If this is not
possible or does not correct it, stick small
amounts of lead weight on the fuselage under
the horizontal stabilizer. If the tail of the plane
falls, the plane is tail heavy. To correct this,
move the battery and receiver forward or if this
is not possible, stick weight into the firewall.
When balanced correctly, the airplane should
sit level or slightly nose down when you lift it
up with your fingers.
TOOLS AND SUPPLIES NEEDED
• Medium C/A glue
• 30 minute epoxy
• 6 minute epoxy
• Hand or electric drill
• Assorted drill bits
• Modeling knife
• Straight edge ruler
SUGGESTION
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.
NOTE:
1. 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. The SBACH 342 .120 SCALE 1:4 ½
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.
2. 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.
3. The SBACH 342 .120 SCALE 1:4 ½ ARF will
perform 3-D aerobatics easily if you use the
largest engines recommended within the
engine range. If you setup your airplane to do
3D maneuvers, you will need to be throttle
conscious; that is, never apply full throttle on
straight and level flying or in dives to prevent
flutter.
SAFETY PRECAUTION:
• 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.
PREPARATIONS
Remove the tape and separate the ailerons
from the wing and the elevators from the stab.
Use a covering iron with a covering sock on
high heat to tighten the covering if necessary.
Apply pressure over sheeted areas to
thoroughly bond the covering to the wood.
• 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.
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• 2 bender plier
• Wire cutters
• Masking tape
• Thread lock
• Paper towels
• Rubbing alcohol
INSTALLING THE AILERONS
1. Test fit the ailerons to the wing with the hinges.
If the hinges don’t remain centered, stick a pin
through the middle of the hinge to hold it in
position.
TEMPORARY PIN
TO KEEP HINGE
CENTERED
CA glue
2
2. Apply six drops of thin CA to the top and bottom
of each hinge. Do not use CA accelerator. After
the CA has fully hardened, test the hinges by
pulling on the aileron.
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INSTALLING THE RUDDER
Repeat step 1 - step 2 from the installing aileron
for the installing rudder.
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6. After the epoxy has fully cured, remove the
masking tape or T-pins used to hold the
stabilizer in place and carefully inspect the glue
joints. Use more epoxy to fill in any gaps that
were not filled previously and clean up the
excess using a paper towel and rubbing alcohol.
7. Repeat step 1 - step 2 from the installing aileron
for the installing elevator.
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5. When you are sure that everything is aligned
correctly, mix up a generous amount of 30
minute epoxy. Apply a thin layer to the bottom
and to the top of the stabilizer mounting area
and to the stabilizer mounting platform sides in
the fuselage. Insert the stabilizer in place and
re-align. Double check all of your
measurements one more time before the epoxy
cures. Remove any excess epoxy using a
paper towel and rubbing alcohol and hold the
stabilizer in place with T-pins or masking tape.
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6. Temporarily position the aileron servo into the
servo bay. Drill a 1.6mm hole through the four
mounting holes of the servo, drilling through
the plywood mounting plate in the wing. Install
and remove a servo mounting screw into each
of the four holes. Insert a drop of thin CA into
the holes to harden the wood. After the glue
has cured, install the servo into the servo bay
using the hardware that came with your servo.
Center the servo and install a servo arm as
shown.
7. Repeat step # 1 - # 6 to install the second
aileron servo in the opposite wing half.
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5. Tie the string from inside the wing to the end of
the servo wire. Pull the servo wire through the
wing with the string. Tape the servo wire to the
wing to prevent it from falling back into the wing.
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Instruction Manual
Remove the
covering
3
Collar
4
Masking tape
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INSTALL THE AILERONS SERVOS & PUSHRODS
1. Install the servo in the wing require the use of
one 305mm servo extension for each aileron
servo. One Y-harness connector is required
and is used to allow the aileron servo to plug
into one slot in your receiver. You may have a
computer radio that allows you to plug the
servos into separate slots and then mix them
together through the radio transmitter. If you
choose to mix them with the radio rather than
the Y-harness, refer to the instructions with
your particular brand of radio.
2. Attach the servo extension to the aileron servo.
Secure the connectors together using a large
piece of heat shrink tubing, tape or other
method for securing the connectors together.
3. Turn the wing panel right side up. Using a
modeling knife, remove the covering from over
the precut servo box.
4. Using the string as a guide and pass the string from
the servo opening to the hole in the root of the wing.
Note: A weigh tied to a string can be used first,
then tied to the servo lead to pull it through.
INSTALLING THE CONTROL HORNS
1. The aileron has a block wood plate for mounting
the control horn. One aileron control horn in
positioned on each aileron.
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2. Make the same way for the plastic linkball to the
other side of the pushrod wire.
3. Plug the aileron 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.
Install the plastic linkball to the servo arm.
Remember use thread locking compound to
secure.
1. Locate the pushrod wire. Screw the link ball
onto the threaded end of the wire. Tighten the
nut against and then install the link ball on the
aileron control horn.
2. Secure the control horn into the aileron.
3. Repeat step # 1 - # 2 to install the control horn
on the second aileron.
INSTALLING THE AILERON LINKAGES
The aileron linkages are assembled as shown
below.
M3 nut
Plastic link ball
10
Adjust
the linkages
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Link ball
M3 nut
12
95mm
22mm
22mm
Remove the covering
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Plastic washer
Plastic control
3mm Screw
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Instruction Manual
INSTALLING THE HORIZONTAL STABILIZER
1. Using a modeling knife, cut away the covering
from the fuselage for the stabilizer and remove it.
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2. Remove the covering from the stabilizer.
When cutting through the covering to remove it,
cut with only enough pressure to only cut
through the covering it's self. Cutting into the
balsa structure may weaken it. This could lead
to possible failure during flight.
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16
Plastic screw
3. Attach the wing to the fuselage as picture.
4. Test the position of the elevator and adjust it as
shown.
5. Repeat step 1 - step 4 for the second aileron
linkage.
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Screw
Flat washer
Flat washer
M3 nut
Aluminum link ball
Servo arm
Plastic link ball
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Instruction Manual
INSTALLING THE THROTTLE SERVO
1. Install the rubber grommets and brass collets
into the elevator, rudder and throttle servos.
Test fit the servos into the servo tray. Trim the
tray if necessary to fit your servos
2. Mount the servos to the tray using the mounting
screws provided with your radio system.
INSTALLING THE ELEVATOR SERVO
1. Remove the covering from both size of the
fuselage.
2. Install two servo to the fuselage as shown.
→
Engine side
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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.
6. When satisfied with the alignment of the stopper
assembly tighten the 3mm x 20mm machine
screw until the rubber stopper expands 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.
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. 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.
Do not secure the tank into place permanently
until after balancing the airplane. You may need
to remove the tank to mount the battery in the
fuel tank compartment.
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.
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To muffler
To carburator
To vent tube
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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
stopper.
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.
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Instruction Manual
INSTALLING THE THROTTLE PUSHROD HOUSING
1. Place the engine into the engine mount and
align it properly with the front of the cowling.
The distance from the firewall to the front of the
engine thrust washer should 145mm.
If your engine is equipped with a remote needle
valve, we suggest installing it into the engine at
this time.
2. When satisfied with the alignment of the engine,
use a pencil and mark the mounting hole
location onto the firewall, where the throttle
pushrod will exit.
!
After installing the wheel pant, apply a small
drop of thin C/A to the bottom nut.
!
3. Now, remove the engine. Using a 5mm drill bit,
drill holes through the firewall and the forward
bulkhead at the marks made.
4. Slide the pushrod housing through the hole in
the firewall, through the hole in the forward
bulkhead, and into the servo compartment.
5. Apply a couple of drops of thin C/A to the pushrod
housing where it exits the firewall and where it
passes through the forward bulkhead. This will
secure the housing in place.
6. Using a modeling knife, cut off the nylon
pushrod housing in front of the servo tray.
INSTALLING THE ENGINE
Locate the long piece of wire used for the
throttle pushrod. One end of the wire has been
pre-bend in to a "Z" bend at the factory. This
"Z" bend should be inserted into the throttle
arm of the engine when the engine is fitted
onto the engine mount. Fit the engine to the
engine mount using the screws provided.
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Collar
8mm
4mm collar
8mm screw
4mm axle
Nut
Collar
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Instruction Manual
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Instruction Manual
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MOUNTING THE COWL
1. Remove the muffler and needle valve assembly
from the engine. Slide the fiberglass cowl over
the engine.
2. Measure and mark the locations to be cut out
for engine head clearance, needle valve,
muffler. Remove the cowl and make these cut
outs using a rotary tool with a cutting disc and a
rotary sanding drum attachment.
3. Slide the cowl back into place. 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 the middle of the precut
opening. Hold the cowl firmly in place using
several pieces of masking tape.
4. While holding the cowl firmly in position, drill
four 1,6mm pilot holes through both the cowl
and the side edges of the firewall.
5. Using a 3mm drill bit, enlarge the four holes in
the cowling.
Enlarging the holes through the cowl will prevent
the fiberglass from splitting when the mounting
screws are installed.
6. Slide the cowl back over the engine and secure
it in place using four 3mm x 12mm wood
screws.
7. Install the muffler. Connect the fuel and
pressure lines to the carburator, muffler and
fuel filler valve. Tighten the screws completely.
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INSTALLING THE THROTTLE
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 material from the arm.
After installing the adjustable metal connector
apply a small drop of thin C/A to the bottom nut.
This will prevent the connector from loosening
during flight.
2. Plug the throttle servo into the receiver and turn
on the radio system. Check to ensure that the
throttle servo output shaft is moving in the
correct direction. When the throttle stick is
moved forward from idle to full throttle, the
throttle barrel should also open and close using
this motion. If not, reverse the direction of the
servo, using the transmitter.
3. Slide the adjustable metal connector/ servo arm
assembly over the plain end of the pushrod
wire. Position the throttle stick and the throttle
trim at their lowest positions.
4. Manually push the carburator barrel fully closed.
Angle the arm back about 45 degree from
center and attach the servo arm onto the servo.
With the carburator barrel fully closed, tighten
the set screw in the adjustable metal connector.
5. Remove the excess throttle pushrod wire using
wire cutters and install the servo arm retaining
screw.
170mm
22mm
22mm
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Instruction Manual
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3. The elevator has a block wood plate for
mounting the control horn. One elevator control
horn in positioned on each elevator.
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INSTALLING THE ELEVATOR LINKAGES
The elevator linkages are assembled as shown below
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105mm
22mm
22mm
The elevator linkages are assembled as shown below
. Repeat these step for the second servo elevator.
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. Repeat these step as installing the aileron
linkages (Page 4 and page 5).
LATERAL BALANCE
After you have balanced a plane on the C.G. You
should laterally balance it. Doing this will help the
airplane track straighter.
5. Turn the airplane upside down. Attach one loop
of heavy string to the engine crankshaft and
one to the tail wheel wire. With the wings level,
carefully lift the airplane by the string. This may
require two people to make it easier.
6. If one side of the wing fall, that side is heavier
than the opposite. Add small amounts of lead
weight to the bottom side of the lighter wing
half's wing tip. Follow this procedure until the
wing stays level when you lift the airplane.
3d sERVOS
The large control throws require servos with
great centering. The digital servos are second to
none in this department. Digital servos such as
the Futaba BLS 351 should be used on all
control surfaces of this airplane for optimum
performance.
Aileron Control
12mm
12mm
Rudder Control
30mm
30mm
Elevator Control
12mm
12mm
CONTROL THROWS
1. We highly recommend setting up a plane using
the control throws listed.
2. The control throws should be measured at the
widest point of each control surface.
3. Check to be sure the control surfaces move in the
correct directions.
Ailerons : 12mm up 12mm down
Elevator : 12mm up 12mm down
Rudder : 30mm right 30mm left
• LOW RATE
3-D PERFORMANCE SETTINGS
The SBACH size 120 will perform 3-D aerobatics
easily if you use the largest engines
recommended within the engine range. If you
setup your airplane to do 3D maneuvers, you
will need to be throttle conscious; that is,
never apply full throttle on straight and level
flying or in dives to prevent flutter.
Ailerons : 45mm up 45mm down
Elevator : 40mm up 40mm down
Rudder : 45mm right 45mm left
HIGH RATE (FOR 3D)
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5. Connect the spring.
INSTALLING THE TAIL WHEEL
1. The tail wheel set.
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2. Remove the covering.
3. Secure the plate to the rudder.
4. Secure the tail brace to the fuselage.
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6. Center the rudder servo using the radio and
install the servo arm. Attach the metal clevis to
the rudder servo arm.
7. Slide a crimp onto the cable, then pass the cable
through the threaded cable end. Pass the cable
back into the crimp and use crimping pliers to
secure the crimp to the cable.
8. Thread the metal connector to the metal clevis.
9. Attach the clevis to the rudder servo. There
should be light tension on each of the wires
when installed properly.
Note: Remember use thread locking compound
to secure.
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Control horn
Control horn
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4. Slide a crimp onto the cable, then pass the
cable through the threaded cable end. Pass
the cable back into the crimp and use crimping
pliers to secure the crimp to the cable. Guide
the cable into the fuselage to the position for
the rudder servo.
2. The rudder has a block wood plate for mounting
the control horn. Two control horn in positioned
on both side rudder (left and right).
3. Install the control horn to the rudder.
5. Thread the metal connector to the link ball.
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Control horn
Screw
Control horn
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Remove the covering
Remove the covering
Remove the covering
Remove the covering
Remove the covering
Remove the covering
Screw
Screw
Screw
Cable end
Crimp
Aluminum ball
Cable
Metal connector
Plastic ball link
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INSTALLING THE RUDDER SERVO
Install the rudder servo to the fuselage as shown.
INSTALLING THE RUDDER LINKAGES
The rudder is controlled by two metal cables.
Install the rudder linkages and cables as below.
1. Use a hobby knife to remove the covering from
the openings for the rudder control cables.
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Install with OS 22cc Engine
Install with OS 120 two stroke
SPECIFICATION
- Wingspan: 1663mm (65.5 in)
- Length: 1638mm (64.5 in)
- Flying weight: 4700-5200 gr
- Wing area: 56 dm2
- Wing loading: 85g/dm2
- Wing type: Naca airfoils
- Covering type: Genuine ORACOVER®
- Gear type: Aluminum Hi-grade for main
gear and spring wire for tail gear (included)
- Spinner size: Plastic 70mm (included)
- Radio: 4 channel minimum (not included)
- Servo: 6 standard hitorque servo: 2 aileron;
2 elevator; 1 rudder; 1 throttle (not included)
- Recommended receiver battery:
4.8-6V / 1200-2000mAh NiMH (not included)
- Servo mount: 21mm x 42 mm
- Propeller: suit with your engine
- Engine: .120 / 2-stroke or .120/4-stroke
glow engine (not included)
- Motor: brushless outrunner 2000-2400 W,
450 KV (not included)
- Gravity CG: 115 mm (4.5in) Back from the
leading edge of the wing, at the fuselage
- Control throw Ailerons: Low: 12mm up/down,
10% expo; High: 15mm up/down, 10% expo
- Control throw Elevators: Low: 12mm up/down,
12% expo; High: 15mm up/down, 12% expo
- Control throw Rudder: Low: 30mm right/left,
15% expo; High: 45mm right/left, 15% expo
- Experience level: Intermediate
- Plane type: Scale Aerobatic
RECOMMENDED MOTOR AND BATTERY SET UP
- Motor: RIMFIRE .120 (not included)
- Lipo cell: 6-12 cells / 4000 – 5500mAh (not included)
- Esc: 80-100A (not included)
50mm
15mm
35mm
70mm
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SBACH
Instruction Manual
INSTALLING THE MOTOR AND BATTERY
This model can fly with electric, here is our
recommended for set up the system.
- Motor: RIMFIRE .120 (not included)
- Lipo cell: 6-12 cells / 4000 – 5500mAh (not included)
- Esc: 80-100A (not included)
Installing the electric motor
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Battery
37
Screw
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ESC
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