SPECIFICATION
Wingspan : 1,590mm 62.60 in.
Length : 1,230 mm 48.43 in.
Weight : 2.8 kg 6.16 Lbs.
Radio : 06-7 channels.
Servo : 08-10 servos.
Parts listing required :
Electric Motor : ( 02pcs ) + AXI 2814/12.
+ KMS 2814/08
Battery: 3 CELLS-LI-POLY
11.1V-4,500 mA.h-20c.
Speed control : ( 02pcs ) : 40 A
Engine (02PCS) : 25 -2 stroke.
Propeller : 9 x 6
Instruction Manual book
Made in Vietnam.
ITEM CODE: BH51.
B-25J MITCHELL . Instruction Manual
2
This instruction manual is designed to help you build a great flying aeroplane. Please read this
manual thoroughly before starting assembly of your B-25J MITCHELL. 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.
HARDWARE PACK
COWLING.
Landing gear.....
T
o 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.
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.
B-25J MITCHELL 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 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) 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.
B-25J MITCHELL. INSTRUCTION MANUAL
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+ This is not a toy
+ Be sure that no other flyers are using your
radio frequency.
+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 st art the motor if people are near .
Do not stand in line with the side of the propeller.
SAFETY PRECAUTION.
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.
REPLACEMENT LARGE PARTS
REPLACEMENT SMALL PARTS
A. Wing panel.
B. Fuselage.
C. Horizontal stabilizer.
D. Vertical stabilizer.
1. Cowling.
3.Guns & Radiator.
2.Gun turret.
4. Retractable landing gear and retractable
nose gear.
5. Wheels.
E. Decal sheet.
6. Radiator.
7. Top fuselage hatch.
1
1
2
3
2
4
6
7
F. Aluminium wing dihedral brace.
A
A
B
C
D
E
F
5
8.Font Greenhouse Canopy .
8
9
9.Main Cockpit canopy .
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1) Install the rubber grommets and brass
eyelets onto the aileron servo.
2) Install the metal connector onto servo
arm.
INST ALLING THE AILERON - FLAP SERVO
CONTROL HORN.
INSTALLING THE AILERON - SERVO CONTROL HORN.
C/A glue.
C/A glue.
Bottom side of left wing.
Flap
Flap
Aileron
Epoxy gue
C/A glue.
C/A glue.
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Epoxy glue.
C/A glue
Bottom side of leftwing.
3) Install the aileron servo as same as
picture.
Remove covering
Thread
Electric wire
Thread
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4) Attach the micro control connector to
the servo arms. Be sure to use the lock tie but
it could free rotation.
Micro control
connector.
CONTROL HORN OF THE AILERON
Bottom side.
Aileron
Flap
Insert aileron control horn to the aileron.
Remove the covering to pre-cut slot of aileron
as picture below.
58mm
Pushrod wire
aileron control horn.
Flap control horn.
aileron control horn.
C/A glue
C/A glue
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Aileron
control horn
Secure
Aileron
Secure
Remove the covering to pre-cut slot of flap as
picture below.
INST ALLING FLAP SERVO-CONTROL HORN.
Remove covering
Flap
Bottom side
Installing the flap servo as picture below.
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CONTROL HORN OF THE FLAP
Flap control horn
Pushrod wire
Insert flap control horn to the flap as picture
below.
C/A glue
Secure
Cut
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Repeat the procedure for the other
wing half.
See pictures below
THERE ARE TWO OPTIONS:
1. ELECTRIC MOTOR.
2. ENGINE MOUNT.
1. ELECTRIC MOTOR.
INSTALLING THE ENGINE MOUNT.
4.5mm
3x 15mm.
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C/A glue
Epoxy glue.
balsa wood piece
C/A glue
C/A glue
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INSTALLING RETRACTABLE LANDING
GEAR
3 x 12mm
3 x 15mm
Mark point
Drill 2mm hole
Top side
Bottom side
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Secure
3 x 12mm
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Retract landing
gear pushrod
Mark point
Secure
Cut
Top side
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Top side of left haft wing
Top side of left haft wing
Top side
Bottom side of left haft wing
Mark point
Remove covering on
to pre-cut slot of hole
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Install the engine cowl as same as picture
below.
ENGINE COWLING INT ALLATION.
Ply wood piece
Center line
Bottom side
Secure the
wing to
the bottom
nacelle
Cowling
Bottom nacelle
Ply wood piece
25 mm
C/A glue
3 x 12 mm
Epoxy glue
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Cut nacelle as picture below.
Cut
Push
Mark line 1
Left side
Left nacelle
Right nacelle
Top side
Mark line 2
Left side
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Line 2
Line 1
Mark line 3
Right side
Mark line 4
Right side
Right side
Line 3
Line 4
C/A glue
C/A glue
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C/A glue
Line 1
Line 2
Line 3
Line 4
Mark point
Push down
and push on
Repeat procedure for the other wing panel.
Secure
Drill 4mm a hole diameter
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Secure
Secure
2. OPTION 2: ENGINE MOUNT.
Draw the straight line
as picture below.
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Saw cross - cut and remove the balsa plywood as picture below.
Mark point
C/A glue
Epoxy glue
balsa wood piece
B-25J MITCHELL . Instruction Manual
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3x20mm
3x20mm
Secure
FUEL TANK.
Vent tube
Fuel fill tube
Fuel pick - up tube
Tie wrap.
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Tie wrap.
92mm
Drill 2mm hole
Mark point
Secure
Throttle pushrod
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Secure
Cut
Throttle servo
Throttle pushrod
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Repeat the procedure for the other wing
half.
Bottom side
Trim and cut
B-25J MITCHELL . Instruction Manual
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Secure
Secure
INSTALLING RETRACT
NOSE GEAR.
3 x 12mm
Secure
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Cut
Epoxy glue
C/A glue
C/A glue
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1) Install the rubber grommets and brass
eyelets onto the elevator servo and nose gear
servo.
2) Install the metal connector onto servo
arm.
Servo for retract only
RETRACTABLE INSTALLATION
SERVO INSTALLATION.
servo for retract
Cut
Secure
Nose gear servo
B-25J MITCHELL. INSTRUCTION MANUAL
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Servo arm
of retracts.
Metal conector
25mm
15mm
Retracts
pushrod system
B-25J MITCHELL . Instruction Manual
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VERTICAL INST ALLA TION.
HORIZONT AL VERTICAL ST ABILIZER IN-
STALLATION.
Elevator servo
Elevator pushrod
C/A glue
C/A glue
C/A glue
Top
Remove covering
Bottom
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Remove covering
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C/A glue
Mark point
Secure
A hole 2.5mm
diameter.
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C/A glue
Mark point
Remove
covering
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Epoxy glue
90 - degree
C/A glue
C/A glue
Top
Bottom
C/A glue
B-25J MITCHELL . Instruction Manual
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C/A glue
C/A glue
B-25J MITCHELL. INSTRUCTION MANUAL
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Secure
Cut
HORIZONT AL INST ALLA TION.
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90º
Vertical
Stabilizer.
Horizontal
Stabilizer.
Install the elevator pushrod- elevator control
horn as picture below.
B-25J MITCHELL. INSTRUCTION MANUAL
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Secure
Elevator
control horn .
Elevator
control horn .
Elevator
control horn .
Elevator servo.
Elevator pusrod
Cut
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See pictures below:
ATTACHMENT WING-FUSELAGE.
Secure
Secure
Cut
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INSTALLING THE RECEIVER AND
BATTERY.
battery
See picture below.
Nose gear servo
Tie wrap.
Elevator servo
Battery
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Cut
Radiator.
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C/A glue
B-25J MITCHELL . Instruction Manual
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B-25J MITCHELL. INSTRUCTION MANUAL
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B-25J MITCHELL . Instruction Manual
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3. Turn the airplane up side down. Place
your fingers on the masking tape and carefully lift the plane .
1) It is critical that your airplane be bal-
anced correctly. Improper balance will cause
your plane to lose control and crash.
THE CENTER OF GRA VITY IS LOCA TED
95MM BACK FROM THE LEADING EDGE
OF THE WING.
2) Mount the wing to the fuselage. Using a
couple of pieces of masking tape, place them
on the top side of the wing 95 mm back from
the leading edge, at the fuselage sides.
BALANCING.
Accurately mark the balance point on the top
of the wing on both sides of the fuselage. The
balance point is located 95mm back from the
leading edge. This is the balance point at which
your model should balance for your first flights.
Later, you may wish to experiment by shifting
the balance up to 10mm forward or back to
change the flying characteristics. Moving the
balance forward may improve the smoothness and arrow- like tracking, but it may then
require more speed for take off and make it
more difficult to slow down for landing. Moving
the balance aft makes the model more agile
with a lighter and snappier ”feel”. In any case,
please start at the location we recommend .
With the wing attached to the fuselage, all
parts of the model installed ( ready to fly), and
empty fuel tanks, hold the model at the
marked balance point with the stabilizer level.
Lift the model. If the tail drops when you
lift, the model is “tail heavy” and you must add
weigh* to the nose. If the nose drops, it is “nose
heavy” and you must add weight* to the tail to
balance.
*If possible, first attempt to balance the model
by changing the position of the receiver battery and receiver. If you are unable to obtain
good balance by doing so, then it will be necessary to add weight to the nose or tail to
achieve the proper balance point.
CG
95mm
B-25J MITCHELL. INSTRUCTION MANUAL
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1) We highly recommend setting up a
plane using the control throws listed.
2) The control throws should be meas-
ured at the widest point of each control surface.
3) Check to be sure the control surfaces
move in the correct directions.
CONTROL THROWS.
Ailerons : 12mm up 12mm down.
Elevator : 18mm up 18mm down.
Rudder : 20mm right 20mm left.
1) Completely charge your transmitter and
receiver batteries before your first day of flying.
2) Check every bolt and every glue joint in
your plane to ensure that everything is tight
and well bonded.
3) Double check the balance of the
airplane.
4) Check the control surface.
5) Check the receiver antenna . It should
be fully extended and not coiled up inside the
fuselage.
6) Properly balance the propeller.
PRE-FLIGHT CHECK.
We wish you many safe and enjoyable
flights with your B25-MITCHELL.
Aileron Control
12
12
18
18
20
20
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