instruction manual book€¦ · yak 55m arf is hand made from natural materials, every plane is...

SPECIFICATION

Wingspan : 1,810 mm. 71.26 in. Length : 1,600 mm. 62.99 in. Weight : 4.6kg. 10.12 lbs. Radio : 6 channels. Servo : 06 standard high torque servos. Engine : 30 cc gas

Made in Vietnam.

Instruction Manual book

ITEM CODE: BH111

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YAK 55 - ITEM CODE:BH111. Instruction Manual

This instruction manual is designed to help you build a great flying aeroplane. Please read thismanual thoroughly before starting assembly of your YAK 55M. Use the parts listing below to identifyall 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. YAK 55M ARF is hand madefrom natural materials, every plane is uniqueand minor adjustments may have to be made.However, you should find the fit superior andassembly 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.

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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.

SAFETY PRECAUTION.

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 slowly andaccurately.

When self-tapping screws have to bescrewed into wood, apply a little white glueto prevent them shaking loose: just squirtwhite glue into the hole and fit the screw.

REPLACEMENT LARGE PARTS

+ 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 start the motor if people are near.Do not stand in line with the side of the propel-ler.

G. Decal sheet. E. Rudder. F. Aluminium wing dihedral brace.

G.

B.

C.

D.

D.B.

F.A.

E.

F.

A. Cowling.

B. Wing panel(Left&Right).

C. Fuselage.D . Horizontal stabilizer.

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1. Install the rubber grommets and brasseyelets onto the aileron servo.

REPLACEMENT SMALL PARTS

1. Aluminium landing gear(Right &Left).

3. Spinner.

2. Wheels.

4. Fuel Tank.

2) Using a modeling knife, remove the cov-ering at possition show below.

3) Using the thread as a guide and usingmasking tape, tape the servo lead to the endof the thread: carefully pull the thread out.When you have pulled the servo lead out, re-move the masking tape and the servo leadfrom the thread.

4) Drill 1,6mm pilot holes through the blockof wood for each of the four mounting screwsprovided with the servo.

6. Tail gear set.

5.Engine mount ply of wood .

INSTALLING THE AILERON SERVOS.

3x12mm 3x15mm

3x12mm

Aileron

Bottom side

Electricwire

Thread

5


Repeat the procedure for the other winghalf.

Install aileron control horn as same aspicture below.

5. Instal servo tray with aileron servo intothe wing as same as picture below.

INSTALLING THE AILERON CONTROL HORN.

Secure

A+B EpoxyPLUS glue

Aileron Control horn.

Installing the aileron linkages as pictures below.

3.INSTALLING THE AILERONLINKAGES.

Secure.

60mm3x10 mm.

Drill a hole1.5mm diameter.

Drill a hole3mm diameter.

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See pictures below:

Repeat the procedure for the other winghalf.

Bottom side

Aileron

Secure

See pictures below:

INSTALLING THE ENGINE MOUNT.

INSTALLING THE ENGINE.

Drill a hole4mm diameter.

5x90mm

4x12mm

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After installing the adjustable metal con-nector apply a small drop of thin C/A tothe bottom nut. This will prevent the con-nector from loosening during flight.

1. Install one adjustable metal connectorthrough the third hole out from the center ofone servo arm, enlarge the hole in the servoarm using a 2mm drill bit to accommodate theservo connector. Remove the excess mate-rial from the arm.

INSTALLING THE THROTTLE PUSHROD.

Secure

Throttle servo

Throttle servo

Secure

Throttle pushrod

C u t

Engine mountply of wood .

3 x 12mm.

Secure.

Pushrod wire.

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PARTS REQUIRED

1) Assemble and mounting the wheel pantsas shown in the following pictures.

MAIN GEAR INSTALATION.

Left side.

Secure.

1. 1.

2.

Secure.

Secure.

L a n d i n ggear.

Secure

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2) A drop of C/A glue on the wheel collarscrews will help keep them from coming loseduring operation.

Repeat the process for the other wheel.

INSTALLING THE STOPPER ASSEMBLY

1) The stopper has been pre-assembledat the factory.

2) Using a modeling knife, cut one lengthof silicon fuel line (the length of silicon fuel lineis calculated by how the weighted clunk shouldrest about 8mm away from the rear of the tankand move freely inside the tank). Connect oneend of the line to the weighted clunk and theother end to the nylon pick up tube in the stop-per.

3) Carefully bend the second nylon tubeup at a 45 degree angle (using a cigarettelighter). This tube will be the vent tube to themuffler.

4) Carefully bend the third nylon tube downat a 45 degree angle (using a cigarette lighter).This tube will be vent tube to the fueling valve.

FUEL TANK.

When the stopper assembly is installed in thetank, the top of the vent tube should rest justbelow the top surface of the tank. It should nottouch the top of the tank.

5) Test fit the stopper assembly into thetank. It may be necessary to remove some ofthe flashing around the tank opening usinga modeling knife. If flashing is present, makesure none of it falls into the tank.

Bottom side.

6) When satisfied with the alignment ofthe stopper assembly tighten the 3mm x 20mmmachine screw until the rubber stopper ex-pands and seals the tank opening. Do not overtighten the assembly as this could cause thetank to split.

7) Using a modeling knife, cut 3 lengths offuel line 150mm long. Connect 2 lines to the 2vent tubes and 1 line to the fuel pickup tube inthe stopper.

8) Feed three lines through the fuel tankcompartment and through the pre-drilled holein the firewall. Pull the lines out from behindthe engine, while guiding the fuel tank intoplace. Push the fuel tank as far forward aspossible, the front of the tank should just abouttouch the back of the firewall.

Blow through one of the lines to ensurethe fuel lines have not become kinked insidethe fuel tank compartment. Air should flowthrough easily.9) To secure the fuel tank in place, apply abead of silicon sealer to the forward area ofthe tank, where it exits the fuselage behind theengine mounting box and to the rear of the tankat the forward bulkhead.

(tygon gas tubing not included)

Vent tube Fuel pickup tube

Fuel fill tube

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4. Install the muffler and muffler extensiononto the engine and make the cutout in thecowl for muffler clearance. Connect the fueland pressure lines to the carburetor, mufflerand fuel filler valve.

Do not secure the tank into place perma-nently until after balancing the airplane. Youmay need to remove the tank to mount thebattery in the fuel tank compartment

1. Slide the fiberglass cowl over the en-gine and line up the back edge of the cowl withthe marks you made on the fuselage.

2. While keeping the back edge of thecowl flush with the marks, align the front ofthe cowl with the crankshaft of the engine. Thefront of the cowl should be positioned so thecrankshaft is in nearly the middle of the cowlopening. Hold the cowl firmly in place usingpieces of masking tape.

3. Slide the cowl back over the engineand secure it in place using four wood screws.See picture below.

Top side.

COWLING.

Secure

Tie wrap.

Trim andcutFuel tank

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Mark point.

65 mm

Mark point

65 mm


Left side.

Top side

3x 12mm

Secure.


Secure.

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Install the spinner backplate, propeller andspinner cone. The spinner cone is held inplace using two 3mm x 8mm machine screws.

Front view.

Machine screw.

Secure.

INSTALLING THE SPINNER.

Secure.

Elevator control horn install as same as theway of aileron control horn. Please see pic-tures below.

Control horn of elevator.

HORIZONTAL STABILIZER.

ELEVATOR CONTROL HORN INSTALLATION.

A+B EpoxyPLUS glue

Bottom side.

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Elevatorcontrol horn

4x12mm

Drill a hole 3 mmdiameter

1. Install the rubber grommets and brasscollets into the elevator servo. Test fit theservo into the servo tray.2. Mount the servo to the tray using themounting screws provided with your radiosystem.

Secure.

Left side

Elevatorservo

ELEVATOR SERVO INSTALLATION.

Bottom side

Secure.

Right side.

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Secure.

Left side.

Right side.

9 mm

247 mm

Drill a hole 1.5mmdiameter

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Elevator pushrod install as same as the wayof aileron pushrod.

ELEVATOR PUSHROD INSTALLATION.

Secure

Elevator pushrod Elevator pushrod

Bottom side.

Rudder servo install as same as method ofelevator servo.See picture below:

Rudder servo

RUDDER SERVO NSTALLATION

Drill a hole 1.5mmdiameter

Rudder servo

Secure

Secure4x12mm

124 mm.3x10mm.

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Rudder control horn install as same as theway of aileron control horn. Please see pic-tures below.

Control horn of Rudder.

RUDDER CONTROL HORN ANDRUDDER CABLE INSTALLATION.

A+B EpoxyPLUS glue.

A+B EpoxyPLUS Glue.

Cut.

Aluminium tube

Aluminium tube

Drill a hole 1.5mm diameter

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Bottom side.

Rudder cable.Elevatorpushrod

MOUNTING THE TAIL WHEELBRACKET.

3x12mm

3x15mm

Drill a hole2.5mm.

Secure.

Secure.

Bottom side.Mark point

Rudder push-pullcable.

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Rudder cable

1) Cut out the switch hole using a modelingknife. Use a 2mm drill bit and drill out the twomounting holes through the fuselage side.

2) Secure the switch in place using thetwo machine screws provided with the radiosystem.

INSTALLING THE SWITCH.

Switch ofengine

Switch

1. Plug the servo leads and the switchlead into the receiver. You may want to plugan aileron extension into the receiver to makeplugging in the aileron servo lead easierwhen you are installing the wing . Plug thebattery pack lead into the switch.

2. Wrap the receiver and battery pack inthe protective foam to protect them from vi-bration. Use a rubber band or masking tape tohold the foam in place.3. Position the battery pack and receiverbehind the fuel tank. Use two tie wraps to holdthe battery and receiver securely in place aspictures below

INSTALLING THE RECEIVER AND BATTERY.

4. Using a 2mm drill bit, drill a hole throughthe side of the fuselage, near the receiver, forthe antenna to exit.

Tie wrap.

Receiver

Locate the aluminium wing dihedral brace.

WING ATTACHMENT.

25 mm

605mm

Switch ofreceiver

Battery ofengine.

Battery ofreceiver.

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*** Test fit the aluminium tube dihedral braceinto each wing haft. The brace should slide ineasily. If not, use 220 grit sand around theedges and ends of the brace until it fits prop-erly.

Left wing

Right wing

Secure.

E p o x yglue

See picture below:

INSTALLING COCKPIT FUSELAGE .

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Top side

C/A glue

Accurately mark the balance point on the topof the wing on both sides of the fuselage. Thebalance point is located 135mm 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 .

3. Turn the airplane upside 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 GRAVITY IS LOCATED135MM 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 135 mm back fromthe leading edge, at the fuselage sides.

BALANCING.

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.

135mm

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1. We highly recommend setting up a planeusing 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 : 25 mm up 25mm down

Elevator : 30 mm up 30mm down

Rudder : 35 mm right 35mm 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 enjoy-able flights with your YAK 55M.

25mm

25mm

30mm30mm

35mm

35mm

instruction manual book€¦ · yak 55m arf is hand made from natural materials, every plane is...

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