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3D Hobby Shop Yak-55 Assembly Manual

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Download this manual See also: Assembly Manual
Yak-55 46"
- Assembly Manual
Thank you for purchasing this 3DHobbyShop aircraft.
If you have any issues, questions, concerns or problems during assembly, please contact our tech
department at:
info@3DHobbyShop.com
or 1-717-814-5316 10am-4pm Eastern Time, Monday-Thursday.
We highly recommend
www.RCGroups.com
as a good source for RC tips, tricks, and information.
SAFETY NOTICE: 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.
IMPORTANT NOTE – We strive to provide the absolute best-quality ARF aircraft on the planet. However, the ultimate
success or failure of this aircraft is dependent upon proper assembly by you. If you have questions about an assembly
step, please contact us, or read the assembly thread for your airplane on RCGroups.com before proceeding. It is
always better to slow down and be sure of your assembly than to rush through it and make a mistake which can cause a
crash.

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Summary of Contents for 3D Hobby Shop Yak-55

  • Page 1 Yak-55 46” - Assembly Manual Thank you for purchasing this 3DHobbyShop aircraft. If you have any issues, questions, concerns or problems during assembly, please contact our tech department at: info@3DHobbyShop.com or 1-717-814-5316 10am-4pm Eastern Time, Monday-Thursday. We highly recommend www.RCGroups.com as a good source for RC tips, tricks, and information.

  • Page 2: Required Items

    SAFETY NOTICE: Flying This is NOT a toy! It is a very high-performance RC airplane capable of high speeds and extreme maneuvers. It should only be operated by a competent pilot in a safe area with proper supervision. ONLY fly your aircraft in a safe, open area, away from spectators and vehicles–and where it is legal to fly. NEVER fly over an unsafe area, such as a road or street.
  • Page 3 ASSEMBLY -- Locate the wheels, wheel axles and axle nuts, wheel collars, and wheel pants. Fit the wheel onto the axle. Install the wheel collar to retain the wheel onto the axle, as shown. Use the axle nut to affix the wheel/axle/pant assembly onto the gear leg, as shown, use included wrench to hold axle.
  • Page 4 -- Using a sharp hobby knife, remove the covering on both sides of the fuselage as shown below, for the wing spar tube, the aileron servo wire access, anti-rotation pin and wing retaining screw. -- Remove the covering over the horizontal stabilizer slot, on both sides with a sharp hobby knife.  ...
  • Page 5 -- Slide the horizontal stabilizer into the fuselage slot. Use a ruler to measure each side to make sure that it is centered. -- Locate the carbon wing-spar tube and slide it into the fuselage. Measure each of the rear corners of the stabilizer to the wing tube as shown.
  • Page 6 -- Locate the elevator half that has the joiner rod attached -- Slide the elevator onto the stabilizer, inserting the elevator joiner rod through the fuselage cutout as shown. DO NOT GLUE THE HINGES YET -- Make sure the elevator can flex up 45 degrees and down 45 degrees easily. You can easily make a tool to measure 45 degrees by folding a piece of paper as shown.
  • Page 7 -- Next place a small piece of tape on the elevator and stab as shown to hold the elevator perfectly straight and level to the stabilizer.   -- Now install the other side elevator without glue. Make sure that the elevator is straight and level to the stabilizer like the first elevator.
  • Page 8 -- Using THIN CA glue, go over the motor box assembly, applying a small amount of glue to all the seams. This is the highest-stress area of the airframe, and we want to make it as strong as possible. -- Your airplane includes a pre-drilled firewall with pre-installed blind nuts that fit Omega, Torque, Hacker, and other popular brands of brushless motors.
  • Page 9 -- Making sure to slide the cowling underneath the taped pieces of paper, slide the cowling onto the front of the plane as shown below. -- Holding the cowling in place with tape, take your time to align the cowling on the fuselage. Measure vertically and horizontally from the edge of the front of the cowling to the motor to ensure that the cowling is centered as shown.
  • Page 10 -- Insert the rudder into the fuselage, make sure it swings 45 degrees in both directions, and glue the hinges with a couple of drops of thin CA from each side as shown. -- Slide the tail wheel bracket over the wire and screw the wood screws into place through the bracket as shown below. Make sure that the rudder swings freely.
  • Page 11 -- Install the tail wheel onto the wire, making sure the wheel rotates freely tighten the set screw with a 1.5mm hex tool as shown below.     -- Insert aileron into wing panel making sure to align the end of the aileron with the wing tip. -- Making sure that the aileron can deflect 45 degrees in each direction freely and glue the hinges with a couple of drops of thin CA on each side.
  • Page 12 -- With a sharp knife, clear the covering over the slot for the control horn in the aileron as shown. -- Test fit the control horn into the slot. Remove the horn and add a bead of thick CA into the control horn slot. Apply some thick CA to each side of the lower portion of the control horn and insert the horn into the aileron as shown.
  • Page 13 -- Install the aileron servo into the wing as shown below. Inside the servo hole there is a piece of string added for convenience to attach your servo wire with tape to help guide the servo wire to the wing root. -- The pushrods for the Yak are assembled as shown below.
  • Page 14 -- Slide the horn through and center it to get an idea as to where it sits, slide out, add thick CA to the center of the horn (make sure to get CA into the holes) on both sides and slide back in making sure it’s centered properly before the glue cures.
  • Page 15   -- Mount the rudder servo as shown below. -- Insert the pull-wire ends into the servo connectors on the rudder servo as shown, just barely poking through the servo connectors, and tighten down the set screws with a 1.5mm hex wrench. Note that the cables cross each other once inside the fuselage, making an “X”...
  • Page 16 -- With a sharp knife, remove a panel of covering underneath the fuselage as shown to allow cooling air a place to exit the aircraft.   -- Mount your receiver and radio equipment into the fuselage. An example of final setup is shown below. A balsa plate is also provided to glue into the plane where convenient to mount your receiver with velcro or your preferred technique.
  • Page 17 OPTIONAL ASSEMBLY Side Force Generators Side force generators (SFG) are optional on this airframe and simple to install and remove. -- Locate the small rectangular holes near the tip of the wings and clear the covering with a sharp hobby knife as shown.  ...
  • Page 18 Another optional feature of this kit is the cowling detail that resembles the radial cooling vanes seen on the full scale Yak-55. Note that the use of the plate does restrict some cooling air entering the cowling to cool the motor, ESC and batteries.

  • Page 19: Setup Information

    SETUP INFORMATION Center of Gravity The recommended Center of Gravity range is 2.75 to 3.25 inches from the leading edge of the wing root. For maiden flight, the plane should ideally have the Center of Gravity at the designer recommended 2.75 inches. After several flights, you can and should adjust to find your perfect, personal CG location.