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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
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This instruction manual is designed to help you build a great flying aeroplane. Please read thismanual thoroughly before starting assembly of your B-25J MITCHELL. Use the parts listing belowto identify all parts.
WARNING.
Please be aware that this aeroplane is not a toy and if assembled or used incorrectly it iscapable of causing injury to people or property. WHEN YOU FLY THIS AEROPLANE YOUASSUME ALL RISK & RESPONSIBILITY.If you are inexperienced with basic R/C flight we strongly recommend you contact your R/C supplierand join your local R/C Model Flying Club. R/C Model Flying Clubs offer a variety of trainingprocedures designed to help the new pilot on his way to successful R/C flight. They will also be ableto 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.....
To avoid scratching your new airplane, do notunwrap the pieces until they are needed forassembly. Cover your workbench with an oldtowel or brown paper, both to protect the air-craft and to protect the table. Keep a couple ofjars or bowls handy to hold the small parts af-ter you open the bag.
Please trial fit all the parts. Make sure you havethe correct parts and that they fit and arealigned properly before gluing! This will assureproper assembly. B-25J MITCHELL ARF ishand made from natural materials, every planeis unique and minor adjustments may have tobe made. However, you should find the fit su-perior and assembly simple.The painted and plastic parts used in this kitare fuel proof. However, they are not tolerantof many harsh chemicals including the follow-ing: paint thinner, C/A glue accelerator, C/A gluedebonder and acetone. Do not let these chemi-cals come in contact with the colors on thecovering and the plastic parts.
PARTS LISTING.
FUSELAGE ASSEMBLY(1) Fuselage.
WING ASSEMBLY
(1) Right wing half with pre-installedaileron.(1) Left wing half with pre-installedaileron.
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 yourradio frequency. +The glow plug clip must be securely attachedto the glow plug.+ Do not flip the propeller with your fingers.+ Keep loose clothing and wires away fromthe propeller.+ Do not st art the motor if people are near .Do not stand in line with the side of the propel-ler.
SAFETY PRECAUTION.Caution: this model is not a toy!If you are a beginner to this type of poweredmodel, please ask an experienced model flyerfor help and support. If you attempt to operatethe model without knowing what you are doingyou could easily injure yourself or somebodyelse. Please keep your safety and well-beingin mind at all times.
Important: before you start constructionEven if you have already built a large numberof RC models please read right through theseinstructions and check all the kit componentsagainst the parts list. We have taken greattrouble to keep construction as simple aspossible, without making any compromisesin the area of safety.
Note regarding the film coveringMinor creases or bubbles may develop in thefilm covering due to major fluctuations inweather conditions (temperature, humidityetc.); in rare cases you may even find a slightwarp in a component. These minor faults arein the nature of film-covered built-up woodenstructures, and can easily be corrected usinga heat gun, as commonly used for modelling.Creases: Blow warm air over the area
and rub down with a softcloth.
Wing warp: Hold the panel twistedgently in the oppositedirection to the warp, andapply warm air to removethe creases from thecovering.
Caution! do not heat the film more than isabsolutely necessary. If the air or the iron istoo hot, the film may melt and holes may beformed.
This model is highly pre-fabricated and canbe built in a very short time. However, the workwhich you have to carry out is important andmust be done carefully . The model will onlybe strong and fly well if you complete yourtasks competently - so please work slowlyand accurately.
When self-tapping screws have to bescrewed into wood, apply a little whiteglue to prevent them shaking loose: justsquirt white glue into the hole and fit thescrew.
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 retractablenose 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
AB
CD
E
F
5
8.Font Greenhouse Canopy .
8
9
9.Main Cockpit canopy .
B-25J MITCHELL . Instruction Manual
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1) Install the rubber grommets and brasseyelets onto the aileron servo.
2) Install the metal connector onto servoarm.
INSTALLING THE AILERON - FLAP SERVOCONTROL HORN.
INSTALLING THE AILERON - SERVO CONTROL HORN.
C/A glue.
C/A glue.
Bottom side of left wing.
Flap FlapAileron
Epoxy gue
C/A glue.C/A glue.
B-25J MITCHELL. INSTRUCTION MANUAL
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Epoxy glue.
C/A glue
Bottom side of leftwing.
3) Install the aileron servo as same aspicture.
Remove covering
ThreadElectric wire
Thread
B-25J MITCHELL . Instruction Manual
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4) Attach the micro control connector tothe servo arms. Be sure to use the lock tie butit could free rotation.
Micro controlconnector.
CONTROL HORN OF THE AILERON
Bottom side.
Aileron
Flap
Insert aileron control horn to the aileron.
Remove the covering to pre-cut slot of aileronas picture below.
58mm
Pushrod wire
aileron control horn. Flap control horn.
aileron control horn.
C/A glue
C/A glue
B-25J MITCHELL. INSTRUCTION MANUAL
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Aileroncontrol horn
Secure
Aileron
Secure
Remove the covering to pre-cut slot of flap aspicture below.
INSTALLING FLAP SERVO-CONTROL HORN.
Remove covering
Flap
Bottom side
Installing the flap servo as picture below.
B-25J MITCHELL . Instruction Manual
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CONTROL HORN OF THE FLAP
Flap control horn
Pushrod wire
Insert flap control horn to the flap as picturebelow.
C/A glue
Secure
Cut
B-25J MITCHELL. INSTRUCTION MANUAL
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Repeat the procedure for the otherwing 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.
B-25J MITCHELL . Instruction Manual
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B-25J MITCHELL. INSTRUCTION MANUAL
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C/A glue
Epoxy glue.
balsa wood piece
C/A glue
C/A glue
B-25J MITCHELL . Instruction Manual
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INSTALLING RETRACTABLE LANDINGGEAR
3 x 12mm
3 x 15mm
Mark point
Drill 2mm hole
Top side
Bottom side
B-25J MITCHELL. INSTRUCTION MANUAL
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Secure
3 x 12mm
B-25J MITCHELL . Instruction Manual
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Retract landinggear pushrod
Mark point
Secure
Cut
Top side
B-25J MITCHELL. INSTRUCTION MANUAL
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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 onto pre-cut slot of hole
B-25J MITCHELL . Instruction Manual
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Install the engine cowl as same as picturebelow.
ENGINE COWLING INTALLATION.
Ply wood piece
Center line
Bottom side
Secure the wing to the bottom nacelle
Cowling
Bottom nacellePly wood piece
25 mm
C/A glue
3 x 12 mm
Epoxy glue
B-25J MITCHELL. INSTRUCTION MANUAL
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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
B-25J MITCHELL . Instruction Manual
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Line 2Line 1
Mark line 3Right side
Mark line 4
Right side
Right side
Line 3Line 4
C/A glue
C/A glue
B-25J MITCHELL. INSTRUCTION MANUAL
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C/A glue
Line 1Line 2
Line 3Line 4
Mark point
Push downand push on
Repeat procedure for the other wing panel.
Secure
Drill 4mm a hole diameter
B-25J MITCHELL . Instruction Manual
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Secure
Secure
2. OPTION 2: ENGINE MOUNT.
Draw the straight lineas picture below.
B-25J MITCHELL. INSTRUCTION MANUAL
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Saw cross - cut and remove the balsa ply-wood as picture below.
Mark point
C/A glue
Epoxy glue
balsa wood piece
B-25J MITCHELL . Instruction Manual
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3x20mm3x20mm
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
B-25J MITCHELL . Instruction Manual
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Secure
Cut
Throttle servo
Throttle pushrod
B-25J MITCHELL. INSTRUCTION MANUAL
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Repeat the procedure for the other winghalf.
Bottom side
Trim and cut
B-25J MITCHELL . Instruction Manual
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Secure
Secure
INSTALLING RETRACT NOSE GEAR.
3 x 12mm
Secure
B-25J MITCHELL. INSTRUCTION MANUAL
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Cut
Epoxy glue
C/A glue
C/A glue
B-25J MITCHELL . Instruction Manual
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1) Install the rubber grommets and brasseyelets onto the elevator servo and nose gearservo.
2) Install the metal connector onto servoarm.
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 armof retracts.
Metal conector
25mm
15mm
Retracts pushrod system
B-25J MITCHELL . Instruction Manual
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B-25J MITCHELL. INSTRUCTION MANUAL
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VERTICAL INSTALLATION.
HORIZONTAL VERTICAL STABILIZER IN-STALLATION.
Elevator servo
Elevator pushrod
C/A glue
C/A glue
C/A glue
Top
Remove covering
Bottom
B-25J MITCHELL . Instruction Manual
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Remove covering
B-25J MITCHELL. INSTRUCTION MANUAL
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C/A glue
Mark point
Secure
A hole 2.5mmdiameter.
B-25J MITCHELL . Instruction Manual
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C/A glue
Mark point
Removecovering
B-25J MITCHELL. INSTRUCTION MANUAL
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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
HORIZONTAL INSTALLATION.
B-25J MITCHELL . Instruction Manual
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90º
VerticalStabilizer.Horizontal
Stabilizer.
Install the elevator pushrod- elevator controlhorn as picture below.
B-25J MITCHELL. INSTRUCTION MANUAL
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Secure
Elevatorcontrol horn .
Elevatorcontrol horn .
Elevatorcontrol horn .
Elevator servo.
Elevator pusrod
Cut
B-25J MITCHELL . Instruction Manual
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See pictures below:
ATTACHMENT WING-FUSELAGE.
Secure
Secure
Cut
B-25J MITCHELL. INSTRUCTION MANUAL
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INSTALLING THE RECEIVER ANDBATTERY.
battery
See picture below.
Nose gear servo
Tie wrap.
Elevator servo
Battery
B-25J MITCHELL . Instruction Manual
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Cut
Radiator.
B-25J MITCHELL. INSTRUCTION MANUAL
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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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3. Turn the airplane up side down. Placeyour fingers on the masking tape and care-fully lift the plane .
1) It is critical that your airplane be bal-anced correctly. Improper balance will causeyour plane to lose control and crash.THE CENTER OF GRA VITY IS LOCA TED95MM BACK FROM THE LEADING EDGEOF THE WING.
2) Mount the wing to the fuselage. Using acouple of pieces of masking tape, place themon the top side of the wing 95 mm back fromthe leading edge, at the fuselage sides.
BALANCING.
Accurately mark the balance point on the topof the wing on both sides of the fuselage. Thebalance point is located 95mm back from theleading edge. This is the balance point at whichyour model should balance for your first flights.Later, you may wish to experiment by shiftingthe balance up to 10mm forward or back tochange the flying characteristics. Moving thebalance forward may improve the smooth-ness and arrow- like tracking, but it may thenrequire more speed for take off and make itmore difficult to slow down for landing. Movingthe balance aft makes the model more agilewith a lighter and snappier ”feel”. In any case,please start at the location we recommend . With the wing attached to the fuselage, allparts of the model installed ( ready to fly), andempty fuel tanks, hold the model at themarked balance point with the stabilizer level. Lift the model. If the tail drops when youlift, the model is “tail heavy” and you must addweigh* to the nose. If the nose drops, it is “noseheavy” and you must add weight* to the tail tobalance.
*If possible, first attempt to balance the modelby changing the position of the receiver bat-tery and receiver. If you are unable to obtaingood balance by doing so, then it will be nec-essary to add weight to the nose or tail toachieve the proper balance point.
CG95mm
B-25J MITCHELL. INSTRUCTION MANUAL
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1) We highly recommend setting up aplane using the control throws listed.
2) The control throws should be meas-ured at the widest point of each control sur-face.
3) Check to be sure the control surfacesmove 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 andreceiver batteries before your first day of fly-ing.
2) Check every bolt and every glue joint inyour plane to ensure that everything is tightand well bonded.
3) Double check the balance of theairplane.
4) Check the control surface.
5) Check the receiver antenna . It shouldbe fully extended and not coiled up inside thefuselage.
6) Properly balance the propeller.
PRE-FLIGHT CHECK.
We wish you many safe and enjoyableflights with your B25-MITCHELL.
Aileron Control
12
12
1818
2020