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TOOLS AND SUPPLIES NEEDED.

•  Medium C/A glue

•  30 minute epoxy

•  6 minute epoxy

•  Hand or electric drill

•  Assorted drill bits

•  Modeling knife

•  Straight edge ruler

•  2 bender plier

•  Wire cutters

•  Masking tape

•  Thread lock

•  Paper towels

•  Rubbing alcohol

SUGGESTION 

To 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.

NOTE:

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. The 

YAK54    MK2  GP/EP  size.120/20cc  SCALE  1:4  ¾ 

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.

SAFETY PRECAUTION:

•  This is not a toy

•  Be sure that no other flyers are using your radio 

frequency.

•  Do not smoke near fuel

•  Store  fuel  in  a  cool,  dry  place,  away  from 

children and pets.

•  Wear safety glasses.

•  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 start the engine if people are near. Do not 

stand in line with the side of the propeller.

•  Make engine adjustments from behind the propeller 

only. Do not reach around the spinning propeller.

PREPARATIONS

Use  a  covering  iron  with  a  covering  sock  on 

high  heat  to  tighten  the  covering  if  necessary. 

Apply  pressure  over  sheeted  areas  to 

thoroughly bond the covering to the wood.

INSTALLING THE AILERONS AND Flaps

1.  Test fit the ailerons to the wing with the hinges. 

If the hinges don’t remain centered, stick a pin 

through  the  middle  of  the  hinge  to  hold  it  in 

position.

TEMPORARY PIN

TO KEEP HINGE

CENTERED

2.  Apply six drops of thin CA to the top and bottom 

of each hinge. Do not use CA accelerator. After 

the  CA  has  fully  hardened,  test  the  hinges  by 

pulling on the aileron.

1

YAK54  MK2

Instruction Manual

< Bottom view >

Main Wing

Aileron

Summary of Contents for YAK54 MK2

Page 1: ...mount 21mm x 42 mm Propeller suit with your engine Engine 120 2 stroke or 120 4 stroke glow engine or 20cc gas engine not included Motor brushless outrunner 2000 2400 W 450 KV not included Gravity CG...

Page 2: ...er and acetone Do not let these chemicals come in contact with the colors on the covering and the plastic parts SAFETY PRECAUTION This is not a toy Be sure that no other flyers are using your radio fr...

Page 3: ...e the masking tape and the servo lead from the thread 5 Repeat step 2 5 to install the second aileron servo in the opposite wing half Make certain the hinges are adequately secured with glue If they c...

Page 4: ...nut against and then install the metal M3 clevis to the other side of the pushrod wire 3 Plug the aileron servo into the receiver and center the servo Install the servo arm onto the servo The servo a...

Page 5: ...e Wing To The Fuselage Attach the wings to the fuselage and secure the wing panels using 4 plastic screw Cut off shaded portion Assemble left and right sides the same way Aileron Aileron Neutral Ailer...

Page 6: ...off shaded portion 4mm Washer 5mm Washer 4mm Spring Washer 4 x 20mm Cap Screw 4 YAK54 MK2 Instruction Manual 5 Apply threadlocker screw cement Main Gear R Main Gear L Collar Collar Washer Washer Nut N...

Page 7: ...rrectly mix up a generous amount of 30 minute epoxy Apply a thin layer to the bottom and to the top of the stabilizer mounting area and to the stabilizer mounting platform sides in the fuselage Insert...

Page 8: ...der YAK54 MK2 Instruction Manual 7 Align the center line of horizontal tail with elevator Cut away film only here Secure nylon hinges with instant glue being careful tail wing and elevator Make certai...

Page 9: ...lide a crimp onto the cable then pass the cable through the threaded cable end Pass the cable back into the crimp and use crimping pliers to secure the crimp to the cable Guide the cable into the fuse...

Page 10: ...able rod INSTALLING THE ELEVATOR SERVO 1 Remove the covering from both size of the fuselage 2 Install two servo to the fuselage as shown 3 Repeat these step as installing the aileron control horn INST...

Page 11: ...Must be purchased separately Cut off shaded portion Pay close attention here YAK54 MK2 Instruction Manual 10 Apply threadlocker screw cement Elevator rod 3x12mm Aluminum ball...

Page 12: ...portion YAK54 MK2 Instruction Manual 11 INSTALLING THE Tail wheel 3 x 12mm TP Screw 3 x 15mm Cap Screw 2 2 2 2 3mm Spring Washer Spring Must be purchased separately 3x12mm Top Hatch Silicone Silicone...

Page 13: ...INSTALLING THE ENGINE MOUNT Apply threadlocker screw cement 4 x 30mm Screw 4mm Washer 4mm Spring Washer 4x30mm 4x30mm 4mm 4mm 4mm 4mm Engine Mount YAK54 MK2 Instruction Manual 12 3x15mm Spring...

Page 14: ...Fuel Tank YAK54 MK2 Instruction Manual 13 7 Using a modeling knife cut 3 lengths of fuel line 150mm long Connect 2 lines to the 2 vent tubes and 1 line to the fuel pickup tube in the stopper 8 Feed t...

Page 15: ...into the throttle arm of the engine when the engine is fitted onto the engine mount Fit the engine to the engine mount using the screws provided Must be purchased separately Nut 4x30mm Screw 4mm 4 8...

Page 16: ...screw INSTALLING THE THROTTLE 1 Install one adjustable metal connector through the third hole out from the center of one servo arm enlarge the hole in the servo arm using a 2mm drill bit to accommodat...

Page 17: ...of the engine The front of the cowl should be positioned so the crankshaft is in the middle of the precut opening Hold the cowl firmly in place using several pieces of masking tape Enlarging the hole...

Page 18: ...opeller and spinner cone The spinner cone is held in place using two screws The propeller should not touch any part of the spinner cone If it dose use a sharp modeling knife and carefully trim away th...

Page 19: ...switch lead into the receiver You may want to plug an aileron extension into the receiver to make plugging in the aileron servo lead easier when you are installing the wing Plug the battery pack lead...

Page 20: ...19 White glue Check the motor rotation When rotating clock wise charge the connection of 2 wires Velcro Battery Cord 4x70mm 4x70mm 4mm 4mm 4mm 4mm Electric Speed Controller Open and Close Top Hatch Ba...

Page 21: ...g to the fuselage Using a couple of pieces of masking tape place them on the top side of the wing 137mm 5 3 in back from the leading edge at the fuselage sides YAK54 MK2 Instruction Manual 20 CONTROL...

Page 22: ...Aileron Aileron Rudder Servo YAK54 MK2 Instruction Manual 21 Elevator Control Aileron Control 11mm 11mm Rudder Control 35mm 35mm 11mm 11mm FLIGHT PREPARATION PRE FLIGHT CHECK 1 Completely charge your...

Page 23: ...22 Main Gear Dimensional Detail TAIL Gear Dimensional Detail 13 0 30 0 270 1 19 0 49 1 25 0 9 0 3 2 16 0 137 7 49 2 25 0 17 0 24 0 167 7 205 7 40 0 13 0 17 0 24 0 4 0 12 0 YAK54 MK2 Instruction Manual...

Page 24: ...23 EXPLODED VIEW 3mm 3mm 3mm 3x10mm TP 2mm 2mm 2x10mm 4x4mm 3x25mm 4x30mm 4x30mm 4x30mm 4mm 4mm 4mm 4mm 4x70mm 4mm 4mm 3x15mm 3x12mm 3mm 4x20mm 3x12mm 3x25mm 3x25mm 3x20mm 3x20mm 3mm 3mm...

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