ms: 65 assembly manual - hobbygulf.comms: 65 assembly manual kit features. • ready-made—minimal...

MS: 65

ASSEMBLY MANUAL

Kit features.

• Ready-made—minimal assembly & finishing required.• Ready-covered covering.• Photo-illustrated step-by-step Assembly Manual.

Made in Vietnam.

SpecificationsWingspan---------------------------------------- 57 in---------------------------- 145cm.Wing area---------------------------------------- 697 sq.in------------------- 45 sq.dm.Approximate flying weight------------------ 6.4-7.5lbs------------------- 2.9-3.4kg.Length-------------------------------------------- 52.8 in--------------------------- 134cm.Recommended engine size---------------- .61 cu.in---------------------- 2-stroke. .72-.82 cu.in------------------ 4-stroke.Radio System required 4 channels with 6 digital servos.Flying skill level Intermediate/advanced.

YAK 54. Instruction Manual

2

INTRODUCTION.

Thank you for choosing the YAK 54 ARTF by SEAGULL MODELS. The YAK 54 was designedwith the intermediate/advanced sport flyer in mind. It is a scale airplane which is easy to fly and quickto assemble. The airframe is conventionally built using balsa, plywood to make it stronger than theaverage ARTF , yet the design allows the aeroplane to be kept light. You will find that most of the workhas been done for you already. The motor mount has been fitted and the hinges are pre-installed. Flying the YAK 54 is simply a joy.

This instruction manual is designed to help you build a great flying aeroplane. Please read thismanual thoroughly before starting assembly of your YAK 54. 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 itis capable 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/Csupplier and 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.

ADDITIONAL ITEMS REQUIRED.

.61 2-stroke engine .72-.82 4-stroke engineComputer radio with six digitalservos.Glow plug to suit engine.Propeller to suit engine.Protective foam rubber for radiosystem.Silicone fuel line.

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.

PARTS LISTING.

FUSELAGE ASSEMBLY(1) Fuselage.(1) Canopy hatch.

WING ASSEMBLY

(1) Right wing half/ aileron.(1) Left wing half with/ aileron.(1) Aluminium dihedral brace.

Tail section assembly

(1) Horizontal stabilizer/ elevatorhalves.

(1) Rudder halves.

Some more parts.

HARDWARE PACK

COWLINGLanding gear.....

www.seagullmodels.com

3

NOTE: To avoid scratching your new aero-plane we suggest that you cover yourworkbench with an old towel. Keep acouple of jars or bowls handy to holdthe small parts after you open thebags.Please trial fit all parts. Make sure youhave the correct parts and that theyfit and are aligned properly beforegluing! This will ensure proper as-sembly as the YAK 54 is made fromnatural materials and minor adjust-ments may have to be made.The paint and plastic parts used inthis kit are fuel proof. However, theyare not tolerant of many harsh chemi-cals including the following: paintthinner, cyano-acrylate glue accel-erator, cyanoacrylate glue de-bonderand acetone. Do not let these chemi-cals come in contact with the colourson the covering and the plastic parts.

Please contact Horizon Hobby for product support and technical assistance at 877-504-0233. Replacement parts are available from your local dealer or through HorizonHobby.HORIZON HOBBY DISTRIBUTIONS INC4105 Fieldstone Rd, Champaign, IL 61822- USA

FOR USA MARKET ONLY.

Horizon Hobby, Inc. guarantees this kit to be free from defects in both material and workmanshipat the date of purchase. This warranty does not cover any parts damage by use or modification.In no case shall Horizon Hobby’s liability exceed the original cost of the purchased kit. Further,Horizon Hobby reserves the right to change or modify this warranty without notice. In thatHorizon Hobby has no control over the final assembly or material used for the final assembly,no liability shall be assumed nor accepted for any damage resulting from the use by the userof the final user-assembled product. By the act of using the user-assembled product, the useraccepts all resulting liability.

Once assembly of the model has been started, you must contact Horizon Hobby, Inc. directlyregarding any warranty question that you have. Please do not contact your local hobby shopregarding warranty issues, even if that is where you purchased it. This will enable Horizon tobetter answer your questions and service you in the event that you may need any assistance.If the buyer is not prepared to accept the liability associated with the use of this product, thebuyer is advised to return this kit immediately in new and unused condition to the place ofpurchase.

Horizon Hobby4105 Fieldstone RoadChampaign, Illinois 61822(217) 355-9511


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1) Carefully remove the aileron from one ofthe wing panels. Note the position of the hinges.

2) Remove each hinge from the wing paneland aileron and place a T-pin in the center ofeach hinge. Slide each hinge into the wingpanel until the T-pin is snug against the wingpanel. This will help ensure an equal amountof hinge is on either side of the hinge line whenthe aileron is mounted to the aileron.

HINGING THE AILERONS.

3) Slide the wing panel on the aileron untilthere is only a slight gap. The hinge is nowcentered on the wing panel and aileron.Remove the T-pins and snug the aileronagainst the wing panel. A gap of 1/64” or lessshould be maintained between the wing paneland aileron.

4)Deflect the aileron and completelysaturate each hinge with thin C/A glue. Theailerons front surface should lightly contact thewing during this procedure. Ideally, when the

5) Turn the wing panel over and deflect theaileron in the opposite direction from theopposite side. Apply thin C/A glue to eachhinge, making sure that the C/A penetrates intoboth the aileron and wing panel.

The hinge is constructed of a specialmaterial that allows the C/A to wick orpenetrate and distribute throughout thehinge, securely bonding it to the woodstructure of the wing panel and aileron.

hinges are glued in place, a 1/64” gap or lesswill be maintained throughout the lengh of theaileron to the wing panel hinge line.

Note:

The control surfaces, including theailerons, elevators, and rudder, areprehinged with hinges installed, but thehinges are not glued in place. It isimperative that you properly adhere thehinges in place per the steps that followusing a high-quality thin C/A glue.

Note:

C/A glue.

Hinge.

T-pin.

T-pin.

C/A glue.

T-pin.


5

3x20mm.

HINGING THE ELEVATOR.

8) After both ailerons are securely hinged,firmly grasp the wing panel and aileron tomake sure the hinges are securely glued andcannot be pulled out. Do this by carefullyapplying medium pressure, trying to separatethe aileron from the wing panel. Use cautionnot to crush the wing structure.

7) Repeat this process with the other wingpanel, securely hinging the aileron in place.

6) Using C/A remover/debonder and apaper towel, remove any excess C/A glue thatmay have accumulated on the wing or in theaileron hinge area.

HINGING THE RUDDER.

Glue the elevator hinges in place using thesame tectniques used to hinge the ailerons.

Glue the rudder hinges in place using thesame tectniques used to hinge the ailerons.

Work the aileron up and down severaltimes to “work in” the hinges and checkfor proper movement.

Note:

TURNBUCKLE INSTALLATION.

The hole location of turnbuckles shown in pic-ture below .

The mounting holes of turnbuckle waspre-drilled at factory.

Installing the turnbuckle for tail strut of hori-zontal fin as same as pictures below.

See pictures below:

Mark and drill 4 holes for engine mount.3x25mm.

ENGINE MOUNT INSTALLATION.

Horizontal fin bottom.

Turnbuckle.

Hinge.

pre-drilled at factory


6

2) Using a modeling knife, cut one lengthof silicon fuel line. Connect one end of the lineto the weighted fuel pick up and the other endto the nylon pick up tube.

3) Carefully bend the second nylon tubeup at a 45º angle. This tube is the vent tube.

Carefully use a lighter or heat gun topermenently set the angle of the vent tube.

4) Test fit the stopper assembly into thetank. It may be necessary to remove some ofthe flashing around the tank opening using amodeling knife. If flashing is present, makesure none falls into the tank.

5) With the stopper assembly in place,the weighted pick-up should rest away fromthe rear of the tank and move freely inside thetank. The top of the vent tube should rest justbelow the top of the tank. It should not touchthe top of the tank.

6) When satisfied with the alignment ofthe stopper assembly tighten the 3 x 20mmmachine screw until the rubber stopper ex-pands and seals the tank opening. Do notovertighten the assembly as this could causethe tank to split.

Important: When the stopper assembly is in-stalled in the tank, the top of the vent tubeshould rest just below the top surface of thetank. It should not touch the top of the tank.

1) Using a modeling knife, carefully cutoff the rear portion of one of the 3 nylon tubesleaving 1/2” protruding from the rear of thestopper. This will be the fuel pick up tube.

INSTALLING THE STOPPER ASSEMBLY.

FUEL TANK INSTALLATION.

Attach the silicone fuel and pressure pipesto the tank. The lower pipe is the ‘feed’ and theupper two the ‘pressure and fill’. The fill pipe isthe next pipe.

Vent tube. Fuel pick up tube.

Fuel fill tube.


7

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

2) Follow diagram below for wheelinstallation:

Blow through one of the lines to ensurethe fuel lines have not become kinked in-

side the fuel tank compartment. Air shouldflow through easily.

You should mark which tube is the ventand which is the fuel pickup when you

attach fuel tubing to the tubes in the stopper.Once the tank is installed inside the fuselage,it may be difficult to determine which is which.

Wheel Collar.

Axle.

Wheel.

Landing Gear.

Nut.

(2) Washer.

3) You have to trim each axle using a toolcutting and cut-off wheel.

46mm

Caution when cutting the axles andwear protective goggles.

Plastic tape.

WHEEL INSTALLATION.

Rubber band.

Fuel tank.

2:Fuel pick-uptube. 3:Fuel fill tube.

1: Vent tube.1

2 31


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(2) Wheel Collar.

Axle.

Wheel.Nut.

Nut.

(2) Washer.

1) The blind nuts for securing the landinggear are already mounted inside the fuselage.

2) Using the hardware provided, mountthe main landing gear to the fuselage.

4) 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.

4) Remove the engine. Using an drill bit,drill the mounting holes through the enginemount at the four locations marked.

2) Place your engine onto the enginemount. Adjust the engine is centered of theedges of the engine case.

3) When you are satisfied with the align-ment, mark the locations of the enginemounting.

1) Install the pushrod housing through thepredrilled hole in the firewall and into the servocompartment. The pushrod housing shouldprotrude 1/4" out past the front of the firewall.

Make a Z-Bend 1/4" from one end of the plainwire pushrod.

MOUNTING THE ENGINE.

INSTALLING THE MAIN LANDING GEAR.

130mm.

4x20mm.

Landing gear.


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5) Bolt the engine to the engine mount usingthe four machine screws. Double check thatall the screws are tight before proceeding.

6) Attach the Z-Bend in the pushrod wire tothe throttle arm on the carburetor. You will needto remove the throttle arm from the car- buretorto be able to attach the Z-bend. Whencomplete, re-attach the throttle arm to the car-buretor.

COWLING INSTALLATION.

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 then trimand cut.

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. Use the spinner backplate as a guide.Hold the cowl firmly in place using pieces ofmasking tape.

3) Install the muffler and muffler extensiononto the engine and make the cut out in thecowl for muffler clearance. Connect the fueland pressure lines to the carburetor, mufflerand fuel filler valve. Secure the cowl to fuse-lage using the 3x10mm screws (4).

Because of the size of the cowl, it may be nec-essary to use a needle valve extension for thehigh speed needle valve. Make this out of suf-ficient length 1.5mm wire and install it into theend of the needle valve. Secure the wire inplace by tightening the set screw in the side ofthe needle valve.

Pushrod wire. 4x30mm.

4.2mm.

Trim and cut.


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Install the spinner backplate, propeller andspinner cone.

INSTALLING THE SPINNER.

INSTALLING THE FUSELAGE SERVO.

INSTALLING THE SWITCH.

Install the switch into the precut hole in theside, in the fuselage.

1) Install the rubber grommets and brasscollets onto the throttle servo. Test fit the servointo the aileron servo mount.

2) Secure the servos with the screws pro-vided with your radio system.The positionshow in picture below:

Because the size of servos differ, youmay need to adjust the size of the precut open-ing in the mount. The notch in the sides of themount allow the servo lead to pass through.

The propeller should not touch any partof the spinner cone. If it does, use a

sharp modeling knife and carefully trim awaythe spinner cone where the propeller comesin contact with it.

Remove covering.

3x10mm.

Elevator servo.

Rudderservo.

Elevator servo. Throttle servo.


11

THROTTLE SERVO ARM INSTALLATION. 1) Install adjustable servo connector in

the servo arm as same as picture below:

HORIZONTAL STABILIZER.1) Using a ruler and a pen, locate the

centerline of the horizontal stabilizer, at the trail-ing edge, and place a mark. Use a triangleand extend this mark, from back to front,across the top of the stabilizer. Also extendthis mark down the back of the trailing edge ofthe stabilizer.

2) Using a modeling knife, carefully removethe covering at mounting slot of horizontal sta-bilizer ( both side of fuselage).

3) Slide the stabilizer into place in the pre-cut slot in the rear of the fuselage. The stabi-lizer should be pushed firmly against the frontof the slot.

4) With the stabilizer held firmly in place,use a pen and draw lines onto the stabilizerwhere it and the fuselage sides meet. Do thison both the right and left sides and top andbottom of the stabilizer.

5) Remove the stabilizer. Using the linesyou just drew as a guide, carefully remove thecovering from between them using a model-ing knife.Center line.

Adjustable Servoconnector.

Servo arm.Nut.

Remove covering.

Pen.

Switch.

Throttle.

Remove covering.


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6) Using a modeling knife, carefully re-move the covering that overlaps the stabilizermounting platform sides in the fuselage. Re-move the covering from both the top and thebottom of the platform sides.

7) When you are sure that everything isaligned correctly, mix up a generous amountof 30 Minute Epoxy. Apply a thin layer to thetop and bottom of the stabilizer mounting areaand to the stabilizer mounting platform sidesin the fuselage. Slide the stabilizer in placeand realign. Double check all of your mea-surements once more before the epoxy cures.Hold the stabilizer in place with T-pins or mask-ing tape and remove any excess epoxy usinga paper towel and rubbing alcohol.

Remove covering. 2) Slide the vertical stabilizer into the slotin the top of the fuselage. The rear edge ofthe stabilizer should be flush with the rear edgeof the fuselage and the lower rudder hingeshould engage the precut hinge slot in thelower fuselage. The bottom edge of the stabi-lizer should also be firmly pushed against thetop of the horizontal stabilizer.

1) Using a modeling knife, remove thecovering from over the precut hinge slot cutinto the lower rear portion of the fuselage. Thisslot accepts the lower rudder hinge.

When cutting through the covering to re-move it, cut with only enough pressure

to only cut through the covering itself. Cuttinginto the balsa structure may weaken it.

COVERED WOOD FILLER PIECEINSTALLATION.

VERTICAL STABILIZER INSTALLATION.

Covered woodfiller piece.

Glued epoxy.

Hinge.

Hinge slot.


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3) While holding the vertical stabilizerfirmly in place, use a pen and draw a line oneach side of the vertical stabilizer where itmeets the top of the fuselage.

4) Remove the stabilizer. Using a mod-eling knife, remove the covering from belowthe lines you drew.

Pen.

5) Slide the vertical stabilizer back inplace. Using a triangle, check to ensure thatthe vertical stabilizer is aligned 90º to the hori-zontal stabilizer.

Set the stabilizer in place and realign. Doublecheck all of your measurements once more be-fore the epoxy cures. Hold the stabilizer in placewith T-pins or masking tape and remove anyexcess epoxy using a paper towel and rubbingalcohol. Allow the epoxy to fully cure beforeproceeding.

6) When you are sure that everything isaligned correctly, mix up a generous amount of30 Minute Epoxy. Apply a thin layer to the mount-ing slot in the top of the fuselage and to the sidesand bottom of the vertical stabilizer mountingarea. Apply epoxy to the bottom and top edgesof the filler block and to the lower hinge also.

When cutting through the covering to re-move it, cut with only enough pressure to

only cut through the covering itself. Cuttinginto the balsa structure may weaken it.

90º

VerticalStabilizer.Horizontal

Stabilizer.

INSTALLING THE AILERON SERVOS.

Servos.

Small weight.

String.

Removecovering.

C/A glue.

Rudder.


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Secure the servos with the screws pro-vided with your radio system.

Repeat the procedure for orther winghaft.

Wing bottom.String.Small weight.

Attach the string to the servo lead andcarefully thread it though the wing. Once youhave string the lead throught the wing, removethe string so it can use for the other servolead. Tape the servo lead to the wing to preventit from falling back into the wing.

Because the size of servos differ, youmay need to adjust the size of the precut open-ing in the mount. The notch in the sides ofthe mount allow the servo lead to pass through.

Using a small weight (Weighted fuel pick-upworks well) and string, feed the string throughthe wing as indicated.

Electric wire.

String.

Plastic tape.

Aileron electric.

Wing.

Pull.

Wing panelbottom.

String.

Electric wire.

Wing bottom.

String.

Small weight.


15

AILERON CONTROL HORN INSTALLATION

Aileron control horn: Mix a small amount of 30 minute epoxy andlightly coat the inside of the hole in the aileronand the control horn screw.

Wing.

Aileron.

drill hole3.2mm.

Wing bottom.

Wing bottom.

72mm.

C/A glue.

Wing bottom.

Aileron control horn.

Center the servo using the radio system.Attach the servo arm to the servo using thescrew provided with the servo.

2 sets.

3x40mm.Wing bottom.

M3 lock nut.

M3 nut.

Aluminium washer.

M3 control horn.


16

Repeat the procedure for the other wing.

ELEVATOR - RUDDER CONTROL HORNINSTALLATION.

3) Install the rudder control horn using thesame method as with the elevator controlhorns.

Wing.

Aileron.

2) Elevator and rudder pushrods assemblyfollow pictures below.

1) Thread one clevis and M2 lock nut onto each elevator control rod. Thread the hornson until they are flush with the ends of the con-trol rods.

ELEVATOR - RUDDER PUSHRODINSTALLATION.

1) Install the elevator control horn usingthe same method as with the aileron controlhorns.

2) Position the elevator control horn onthe both side of elevator.

M2 lock nut.

2 sets.

3x35mm.

Right side.

Elevator control horn.

Ruddercontrol

Elevatorcontrol horn.

Left side.


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M2 lock nut.Snap keeper.

M2 clevis.

INSTALLING TAIL STRUT SYSTEM.

The tail strut system assembly followpictures below.

3x10mm.Alumium trap.

42mm.

Throttle.

Rudder.

Elevator.

Alumium trap.

3x10cm(2pcs). 1

Plastic clip.

2

1

Rudder pushrod.

Elevator pushrod.

Turnbuckle.


18

3) Secure the tail wheel bracket in placeusing two 3x10mm wood screws. Be carefulnot to overtighten the screws.

2) Using a pen, mark the locations of thetwo mounting screws. Remove the tail wheelbracket and drill 1mm pilot holes at the loca-tions marked.

1) Plug the six servo leads and the switchlead into the receiver. Plug the battery packlead into the switch also.

2) Wrap the receiver and battery pack inthe protective foam rubber to protect themfrom vibration.

3) Route the antenna in the antenna tubeinside the fuselage and secure it to the bot-tom of fuselage using a plastic tape.

INSTALLING THE BATTERY-RECEIVER.

See pictures below.

MOUNTING THE CONTROL CLASP. ATTACHMENT WING-FUSELAGE.

Attach the aluminium tube into fuselage.

1) Set the tail wheel assembly in place onthe plywood plate. The pivot point of the tailwheel wire should be even with the rudderhinge line and the tail wheel bracket shouldbe on the plywood plate.

MOUNTING THE TAIL WHEEL.

2

Receiver.

Tie wrap.

Antenna.

Control clasp.

2x20mm.

2 screws.


19

Insert two wing panels as pictures below.

1) It is critical that your airplane be bal-anced correctly. Improper balance will causeyour plane to lose control and crash. The cen-ter of gravity is locate 6.5-7.5cm back fromthe leading edge of the wing, measured at wingtip.

BALANCING.

2) If the nose of the plane falls, the planeis nose heavy. To correct this first move thebattery pack further back in the fuselage. Ifthis is not possible or does not correct it, sticksmall amounts of lead weight on the fuselagesides under the horizontal stabilizer. If the tailof the plane falls, the plane is tail heavy. Tocorrect this, move the battery and receiver for-ward orif this is not possible, stick weight ontothe firewall. When balanced correctly, the air-plane should sit level or slightly nose downwhen you lift it up with your fingers.

2) Turn on the radio system, and with thetrim tabs on the transmitter in neutral, centerthe control surfaces by making adjustmentsto the clevises or adjustable servo connectors.The servo arms should be centered also.

1) We highly recommend setting up theYAK 54 using the control throws listed at right.We have listed control throws for both LowRate (initial test flying/sport flying) and HighRate (aerobatic flying).

3) When the elevator, rudder and aileroncontrol surfaces are centered, use a ruler andcheck the amount of the control throw in eachsurface. The control throws should bemeasured at the widest point of each sur-face!

CONTROL THROWS.

Wing bolt.

CG=6.5 - 7.5cm.


20

FLIGHT PREPARATION.

A) Check the operation and direction ofthe elevator, rudder, ailerons and throttle.

B) Plug in your radio system per themanufacturer's instructions and turn every-thing on.

4) By moving the position of the adjust-able control horn out from the control surface,you will decrease the amount of throw of thatcontrol surface. Moving the adjustable con-trol horn toward the control surface will in-crease the amount of throw.

INITIAL FLYING/SPORT FLYING

Do not use the aerobatic settings forinitial test flying or sport flying.

Ailerons: 3/16” up 3/16” down Elevator: 3/8” up 3/8” down Rudder: 3/4” right 3/4” left

AEROBATIC FLYING

Ailerons: 3/8” up 3/8” down Elevator: 7/8” up 7/8”down Rudder: 1 1/4” right and left

F) From behind the airplane, look at theaileron on the right wing half. Move the aileronstick to the right. The right aileron should moveup and the other aileron should move down. Ifit does not, flip the servo reversing switch onyour transmitter to change the direction.

PREFLIGHT CHECK.

1) Completely charge your transmitterand receiver batteries before your first day offlying. 2) Check every bolt and every glue jointin the YAK 54 to ensure that everything is tightand well bonded.

3) Double check the balance of the air-plane. Do this with the fuel tank empty.

4) Check the control surfaces. All shouldmove in the correct direction and not bind inany way.

5) If your radio transmitter is equippedwith dual rate switches double check that theyare on the low rate setting for your first fewflights.

6) Check to ensure the control surfacesare moving the proper amount for both lowand high rate settings.

E) Check the throttle. Moving the throttlestick forward should open the carburetor bar-rel. If it does not, flip the servo reversing switchon your transmitter to change the direction.

D) Check the rudder. Looking from be-hind the airplane, move the rudder stick to theright. The rudder should move to the right. If itdoes not, flip the servo reversing switch onyour transmitter to change the direction.

C) Check the elevator first. Pull back onthe elevator stick. The elevator halves shouldmove up. If it they do not, flip the servo re-versing switch on your transmitter to changethe direction.

8) Properly balance the propeller. An outof balance propeller will cause excessive vi-bration which could lead to engine and/or air-frame failure.

We wish you many safe and enjoyable flights with your YAK 54.

7) Check the receiver antenna. It shouldbe fully extended and not coiled up inside thefuselage.

ms: 65 assembly manual - hobbygulf.comms: 65 assembly manual kit features. • ready-made—minimal...

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