background image

 

1

3DHobbyShop.com

  Yak 54  55” Assembly Manual 

 

Thank you for purchasing this 3DHobbyShop ARF RC aircraft.  If you have any issues, questions, 
concerns or problems during assembly, please contact our tech department at: 
 

[email protected]

 or 1-830-990-6978 10am-5pm Central M-F 

 

SAFETY in Assembly 

 
During assembly of this aircraft, you will be asked to use sharp knives and hobby adhesives.  Please 
follow all safety procedures recommended by the manufacturers of the products you use, and always 
follow these important guidelines: 
 
ALWAYS protect your eyes when working with adhesives, knives, or tools, especially power tools.  Safety 
glasses are the best way to protect your eyes. 
 
ALWAYS protect your body, especially your hands and fingers when using adhesives, knives, or tools, 
especially power tools.  Do not cut toward exposed skin with hobby knives.  Do not place hobby knives on 
tables or benches where they can roll off or be knocked off.   
 
ALWAYS have a first-aid kit handy when working with adhesives, knives, or tools, especially power tools.   
 
ALWAYS keep hobby equipment and supplies out of the reach of children. 
 
 

SAFETY in Flying 

 
ALWAYS fly your aircraft in a safe area, away from spectators. 
 
ALWAYS fly your aircraft in a safe manner, within your control. 
 
NEVER fly too close to yourself. 
 
ALWAYS wear eye protection while operating your model aircraft. 
 
ALWAYS keep your hands and body clear of propellers. 
 
ALWAYS observe lipoly battery safety procedures. 
 
 

REQUIRED ITEMS 

 
Thin CA Glue 
Medium CA Glue 
Hobby Knife 
Small Phillips Screwdriver 
Set Metric Allen Wrenches 
Scissors 
Small Pliers 
Clear Tape 
Wire Cutters 
Paper towels 
1/16 inch drill bit 
Epoxy glue (optional) 
 

Summary of Contents for Yak 54

Page 1: ...ingers when using adhesives knives or tools especially power tools Do not cut toward exposed skin with hobby knives Do not place hobby knives on tables or benches where they can roll off or be knocked off ALWAYS have a first aid kit handy when working with adhesives knives or tools especially power tools ALWAYS keep hobby equipment and supplies out of the reach of children SAFETY in Flying ALWAYS ...

Page 2: ...nd corners or even by melting it The covering will shrink at low temperature with patient application of heat Wrinkles do not affect flight performance WING ASSEMBLY The ailerons hinge onto the wings using 4 hinges each The hinges are already installed into the wings but need to be glued with THIN CA glue Check the fit of the aileron to be sure the color stripes line up on the wing and flex the ai...

Page 3: ...dlocker to lock the nut on the bottom of the arm If you do not use CA glue or threadlocker on all of the nuts on this aircraft they will come loose in flight and the airplane will crash Insert your servo into the mount hole in the wing and attach with the servo mounting screws included with your servos The head of the servo where the servo arm attaches should be toward the FRONT of the airplane Ma...

Page 4: ...teps for the other wing Let the wings cure and move on to the fuselage and tail FUSELAGE TAIL ASSEMBLY Attach the landing gear to the fuselage with two 3mm black screws as shown BEFORE attaching the wheels to the landing gear ...

Page 5: ...and secure with wheel collars Install axles and wheels into pants and bolt pant assembly onto landing gear as shown using the locknuts Remove the covering over the horizontal stabilizer opening and elevator servo openings as shown ...

Page 6: ...ections Check the alignment with a ruler and check to make sure the stabilizer is level with the wing tube It may be helpful to temporarily slide the elevators into their slots DO NOT GLUE THE ELEVATORS IN YET to help check alignment This alignment will take some time When you are satisfied with your stabilizer position use thin CA glue to glue the stabilizer into the slot The fit between the stab...

Page 7: ...or the rudder control horn remove the covering over the slot and glue the control horn into the rudder as shown with medium and thin CA using the same procedure as for the aileron horns Test fit the horn before applying CA glue as you did before Slide the rudder into the rear of the fuselage vertical stabilizer and use two large drops of CA glue on each rudder hinge Slide the tailwheel tiller wire...

Page 8: ...or alignment and free motion of the elevators Because good 3D flight requires extreme elevator throw leave a small 1 2mm gap between the elevators and horizontal stabilizer to allow maximum throw Apply two large drops of thin CA glue to each hinge Do not use less than two large drops Install your servo extensions onto the elevator servos Install the elevator servos as shown in each side of the fus...

Page 9: ...9 Make and install the elevator pushrods in the same way you did the aileron pushrods Locate the slot in the fuselage for the rudder pull pull cable exit and remove the covering as shown ...

Page 10: ...embled as shown in this diagram below Begin by assembling the rear rudder mounted end of the cables Crimp the brass tube crimp sleeves securely with pliers but not wire cutters you might accidentally cut the crimp sleeves in half and add a drop of thin CA to each crimp sleeve after crimping ...

Page 11: ... no sag and no play at the rudder end of the system but not severely tight Over the life of your Yak you will need to periodically tighten these rudder cables Slack rudder cables can cause poor handling and lead to major trim problems on your Yak Use motor mount to mark holes in the firewall in the proper location as shown Drill holes in marked locations and install brushless outrunner motor onto ...

Page 12: ...selage Either mount it to the fuselage side or restrain it properly inside the fuselage so that the switch cannot be flipped to the off position while in flight NOTE ESC cooling is extremely important Do not use foam rubber foam tape or any other insulating material in the mounting of your ESC If you fly in extremely hot conditions consider the use of an add on heat sink ...

Page 13: ...crews These screws go into the small plywood squares on the front inside of the fuselage Soak these squares in thin CA glue to harden them before proceeding The following procedure is helpful to be sure the wood screws hit the plywood squares First make small holes into the plywood squares through the covering with the cowl and canopy off Tape small pieces of paper over these holes as shown and ma...

Page 14: ...irplane on for the first time Once your radio is powered center all servo trims and sub trims then re install all servo horns WITHOUT the prop installed reverse servos as necessary NEVER do servo reversing on an airplane with the propeller installed you may accidentally reverse the throttle channel causing injury WITHOUT the prop run your motor check for correct direction of rotation Reversing mot...

Page 15: ...he elevator In any case I recommend sealing all three control surfaces gaps There are two basic materials that are commonly used to seal hinge gaps on model airplanes tape and clear covering I prefer Blenderm clear tape as it sticks extremely well and doesn t make a crinkling sound when moved in the hinge If you choose to use clear covering make sure it is a low temperature covering to match the s...

Page 16: ...16 Scott s Tip Sealing Hinge Gaps Continued ...

Page 17: ...o manufacturer s instructions Make your first flight with the controls set on low rates During the trimming phase we recommend landing with some throttle not attempting to dead stick the airplane This may mean you need to time your flights and keep them a bit shorter than usual After your first flights check all control connections and motor and prop mounts for tightness If you have any damage to ...

Page 18: ...18 ...

Reviews: