Instruction Manual Book - Blackhorsemodel · 2017-09-08 · SUKHOI 31. INSTRUCTION MANUAL. 3 Caution: this model is not a toy! If you are a beginner to this type of powered model,

SPECIFICATION

1 Wingspan : 1,750 mm 68.9 in.1 Length : 1,730 mm 68.1 in.1 Weight : 4.8 kg 10.56 lbs.Parts listing required (not included):1 Radio : 06 channels.1 Servo : 06 servos.1 Engine : 160 cu.in 2 stroke; 200 cu.in 4 stroke.

Instruction Manual Book

Made in Vietnam.

ITEM CODE: BH12.

SUKHOI 31. INSTRUCTION MANUAL.

2

This instruction manual is designed to help you build a great flying aeroplane. Please read thismanual thoroughly before starting assembly of your SUKHOI 31. Use the parts listing below toidentify 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.

1 Thick cyanoacrylate glue.1 30 minute epoxy.1 5 minute epoxy.1 Hand or electric drill.1 Assorted drill bits.1 Modelling knife.1 Straight edge ruler.1 2mm ball driver.1 Phillips head screwdriver.1 220 grit sandpaper.1 90° square or builder’s triangle.1 Wire cutters.1 Masking tape & T-pins.1 Thread-lock.1 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. SU KHOI 31 ARF is handmade from natural materials, every plane isunique 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 ASSEMBLY1 (1) Fuselage.

WING ASSEMBLY

1 (1) Right wing half with pre-installedaileron.

1 (1) Left wing half with pre-installedaileron.

Tail section assembly

1 (1) Vertical stabilizer with pre-installed rudder.

1 (1) Horizontal stabilizer with pre-installed elevator halves.

SUGGESTION.

NOTE.


3

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.

+ This is not a toy + Be sure that no other flyers are using yourradio frequency. + Do not smoke near fuel + Store fuel in a cool, dry place, away fromchildren and pets. + Wear safety glasses. +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 engine if people are near.Do not stand in line with the side of the propel-ler. + Make engine adjustments from behind thepropeller only. Do not reach around the spin-ning propeller.

SAFETY PRECAUTION.

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

INSTALLING THE AILERON SERVOS.


4

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

1 5. 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.

1 4. Drill 1,5mm pilot holes through the blockof wood for each of the four mounting screwsprovided with the servo. Install servo into ai-leron servo tray as same as picture below.

1 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.

C/A glue.

C/A glue.

C/A glue.

Bottom of wing.

Remove thecovering.

Electricwire.

Thread.


5

Control horn of Aileron

3x50mm.

Nilon control clasp.M3 lock nut.

Repeat the procedure for the other winghalf.

INSTALLING THE AILERON CONTROL HORN.

Remove thecovering.

Bottom side.

Remove thecovering.

Top side.


6


Install aileron control horn as sameas picture below.

bottom size

C/A ghue.

Control horn.


Installing the aileron linkages as pictures below.

Attach the clevis to the outer hole in the con-trol horn.

M3 M3 lock nut

INSTALLING THE AILERONLINKAGES.


7

INSTALLING THE ENGINE MOUNT.

C/A glue.

4x30mm

4x30mm

INSTALLING THE STOPPER ASSEMBLY

FUEL TANK.


8

1 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.

1 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.

1 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.

Blow through one of the lines to ensurethe fuel lines have not become kinked insidethe fuel tank compartment. Air should flowthrough easily.

1 1. The stopper has been pre-assembled at the factory.1 2. Using a modeling knife, cut one length ofsilicon fuel line (the length of silicon fuel line iscalculated 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.1 3. Carefully bend the second nylon tube upat a 45 degree angle (using a cigarette lighter).This tube will be the vent tube to the muffler.1 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.

When the stopper assembly is installedin the tank, the top of the vent tube shouldrest just below the top surface of the tank.It should not touch the top of the tank.

1 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.

1 6. When satisfied with the alignment of thestopper 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.

Vent tube Fuel pickup tube

Fuel fill tube


9

Do not secure the tank into place perma-nently until after balancing the airplane.You may need to remove the tank to mountthe battery in the fuel tank compartment.

Fuel tank.

Locate the long piece of wire used for thethrottle pushrod. One end of the wire has beenpre-bend in to a “Z” bend at the factory. This“Z” bend should be inserted into the throttlearm of the engine when the engine is fitted ontothe engine mount. Fit the engine to the enginemount using the screws provided.

INSTALLING THE ENGINE-THROTTLE.

14.5 cm.


10

4 x30mm.

Secure.

Left side.

Right side.

COWLING.

1 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.

Pushrod wire.


11

Right side. Trim and

Trim and cut.

Bottom side.

Bottom side.

1 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 x 12mm.

Install the spinner backplate, propeller andspinner cone. The spinner cone is held inplace using two 3mm x 12mm wood screws.

1 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.

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

INSTALLING THE SPINNER.

3 x 12mm.


12

1 1. Assemble and mounting the wheelpants as shown in the following pictures.

Secure.

PARTS REQUIRED

MAIN GEAR INSTALATION.

1 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.

Repeat the procedure for the otherwheel pant .


13

INSTALLING THE MAIN LANDING GEAR.

Landing gear.

Secure.

1 3. Using the hardware provided, mountthe main landing gear to the fuselage.

1 1. The blind nuts are already mountedinside the fuselage.1 2. The holes in the landing gear shouldbe to accept the mounting bolts.

1 1. Set the tail wheel assembly in placeon the plywood plate. The pivot point of thetail wheel wire should be even with the rud-der hinge line and the tail wheel bracketshould be centered on the plywood plate.

1 2. Using a pen, mark the locations ofthe two mounting screws. Remove the tailwheel bracket and drill 1mm pilot holes atthe locations marked.

3x12mm

MOUNTING THE TAIL WHEELBRACKET.

Bottom side


14

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

Remove the covering 1 Horizontal stabilize installation .See picture below.

elevator servo right side

Top elevator.

HORIZONTAL STABILIZER INSTALLATION.

elevator servo left side

ELEVATOR INSTALLATION

SERVO INSTALLATION


15

C/A glue.

C/A glue.

C/A glue.

1 1. Using a modeling knife, cut away the covering from the fuselage for the stabilizer and remove it.

1 2. Draw a center line onto the horizontalstabilizer. Then put the horizontal into the fuselarge.

1 3. Mark the shape of the vertical on the leftand right sides onto the horizontal stabilizerusing a felt-tip pen

Center line.

Top elivator


16

Bottom side.

1 4. Remove the stabilizer. Using the linesyou just drew as a guide, carefully remove thecovering from between them using a modelingknife. When cutting through the covering toremove it, cut with only enough pressureto only cut through the covering it’s self.Cutting into the balsa structure mayweaken it. This could lead to possible fail-ure during flight

Remove covering.

Bottom side.

1 5. 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 re-align. Double check all of your meas-urements one more time before the epoxycures. Remove any excess epoxy using apaper towel and rubbing alcohol and hold thestabilizer in place with T-pins or masking tape.

Epoxy glue.

C/A glue.

Check to mark sure the wing and stabi-lizer are paralell. If they are not, lightly sandthe opening in the fuselage for the stabilizeruntil the stabilizer is paralell to the wing.

C/A glue.


17

6. After the epoxy has fully cured, removethemasking tape or T-pins used to hold thestabilizer in place and carefully inspect theglue joints. Use more epoxy to fill in anygaps that were not filled previously andclean up the excess using a paper towel andrubbing alcohol.

Control horn of elevator.

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

ELEVATOR CONTROL HORNPUSHROD INSTALLATION.

3mm x 40mm.

M3 lock nut.

Nilon control clasp.

Remover covering.

Bottom side.

Bottom side.

Elevatorcontrol horn.

Elevatorcontrol horn.


18

1 Elevator pushrod install as same as theway of aileron pushrod.

ELEVATOR PUSHDRODINSTALLATION

Top side.

VERTICAL INSTALLATION.

1 1. Using a modeling knife cut away thecovering from the end of fuselage for the rud-der hinge.

Vertical stabilizer installation See picture below.

Hinge.

C/A glue.

Left side.

Right side.

Elevatorpushrod.

Elevatorpushrod.

Bottom side.

Rudder

2. A/B


19

1 3. Mark the shape of the vertical on the leftand right side of the rudder using a felt-tip pen.

1 2. Put the rudder into the fuselage as sameas picture below.

Hinge slot.

Mark line

1 4. Now, remove the rudder and using amodeling knife, carefully cut just inside themarked lines and remove the film of the rud-der. Just as you did with the horizontal stabi-lizer, make sure you only press hard enough to cut the film, not the balsa rudder.

Remove covering.

1 Also carefully remove the covering fromthe horizontal fin as below the lines whichyou drew as same picture below.

Removecovering.

Epoxy glue.


20

Rudder push-pull system install as samsas picture below

RUDDER PUSHROD INSTALLATION.

1 1. Rudder pushrod install as same asthe way of aileron control horn.

1 2. Rudder push - pull system install assame as picture below.

M3 clevis ( 4pcs for push - pull system ).

M3 lock nut.

1 6) When you are sure that everything is aaligned correctly, mix up a generous amountof 30 minute epoxy. Apply a thin layer to theslot in the mounting platform and to the verti-cal stabilizer mounting area. Apply epoxy tothe lower rudder hinge. Set the stabilizer in

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

Control horn of Rudder.

Nilon control clasp.

M3 lock nut.

3mmx60mm.

RUDDER CONTROL HORN INSTALLA-TION.

Removecovering.

place and re-align. Double check all of yourmeasurements once more before the epoxycures. Remove any excess epoxy using apaper towel and rubbing alcohol and hold thestabilizer in place with T-pins or masking tape.Allow the epoxy to fully cure before proceed-ing.

C/A glue.

C/A glue.


21

C/A glue.

Elevatorpushrod.

Rudder cable. Rudder cable.

Elevatorpushrod.

Cut.

Rudder push - pull cable


22

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 accommodatethe servo connector. Remove the excessmaterial from the arm.

After installing the adjustable metal connec-tor apply a small drop of thin C/A to the bot-tom nut. This will prevent the connector fromloosening during flight.

Conector.

Servo arm.

Cut.

secure.

1 1. Cut out the switch hole using amodeling knife. Use a 2mm drill bit and drillout the two mounting holes through the fuse-lage side.1 2. Secure the switch in place using thetwo machine screws provided with the radiosystem.

INSTALLING THE SWITCH.

1 3. Secure the tail wheel bracket in placeusing three 3mm x 12mm wood screws.Be careful not to overtighten the screws.

Rudder cable.

Secure

3X12mm

INSTALLING THE THROTTLE PUSHROD.

Throttle pushrod.


23

Switch

INSTALLING THE RECEIVER AND BATTERY.

1 2. Wrap the receiver and battery pack inthe protective foam to protect them from vi-bration. Use a rubber band or masking tapeto hold the foam in place.

1 3. Position the battery pack and receiverbehind the fuel tank. Use two tie wraps tohold the battery and receiver securely in place.As pictures below. Do not permanently secure the receiverand battery until after balancing the model.

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

1 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.

Tie warp for battery

Recever

Tie wrap.


24

2. Locate the aluminium wing dihedralbrace.

1 1. Using a modeling knife, remove the cov-ering fuselage.

1 3. Test fit the dihedral brace into fuse-lage.

WING ATTACHMENT.

Wing bolt.

Secure the wing and fuse large through wingbolt as picture below.

Wing bolt.

1 )***Test fit the aluminium tube dihedralbrace into each wing haft. The brace shouldslide in easily. If not, use 220 grit sand aroundthe edges and ends of the brace until it fitsproperly.

Battery


25

Installing the canopy as same aspicture below

Secure the canopy frame.

1 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 LOCATED115MM BACK FROM THE LEADING EDGEOF THE WING.

1 2) Mount the wing to the fuselage. Using acouple of pieces of masking tape, place themon the top side of the wing 115mm back fromthe leading edge, at the fuselage sides.

Accurately mark the balance point on the topof the wing on both sides of the fuselage. Thebalance point is located 115mm back fromthe leading edge. This is the balance point atwhich your model should balance for your firstflights. Later, you may wish to experiment byshifting the balance up to 10mm forward orback to change the flying characteristics.Moving the balance forward may improve thesmoothness and arrow- like tracking, but itmay then require more speed for take offand make it more difficult to slow down forlanding. Moving the balance aft makes themodel more agile with a lighter and snappier”feel”. In any case, please start at the loca-tion 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 mustadd weigh* to the nose. If the nose drops, itis “nose heavy” and you must add weight* tothe tail to balance.

*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.

1 3. Turn the airplane upside down. Placeyour fingers on the masking tape and care-fully lift the plane .

BALANCING.


26

4 1) Completely charge your transmitter andreceiver batteries before your first day of fly-ing.4 2) Check every bolt and every glue joint inyour plane to ensure that everything is tightand well bonded.

4 3) Double check the balance of theairplane.

4 4) Check the control surface.

4 5) Check the receiver antenna . It shouldbe fully extended and not coiled up inside thefuselage.4 6) Properly balance the propeller.

PRE-FLIGHT CHECK.

Ailerons : 30mm up 30mm down Elevator : 30mm up 30mm down Rudder : 35mm right 35mm left

4 1) We highly recommend setting up aplane using the control throws listed.

CONTROL THROWS.

4 2) The control throws should be meas-ured at the widest point of each control sur-face.

4 3) Check to be sure the control surfacesmove in the correct directions.

We wish you enjoy.

CG115mm

Ailerons Control

3030

3030

3535


27

Documents

Instruction Manual Book - Blackhorsemodel · 2017-09-08 · SUKHOI 31. INSTRUCTION MANUAL. 3 Caution: this model is not a toy! If you are a beginner to this type of powered model,