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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:
Info@3DHobbyShop.com
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)
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Summary of Contents for 3DHobbyShop.com Yak 54
- Page 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: Info@3DHobbyShop.com 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.
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Page 2: Wing Assembly
WRINKLES Your Yak 54 was packed in plastic at the factory without any wrinkles in the covering. You may notice some wrinkles now; more likely, you will notice a few in a day or two or the first time you take the plane out to the flying field. - Page 3 Test-fit the control horn into the slot to make sure it installs easily – you do not want to experience a problem inserting the horn when you have CA glue on it. Install the control horn, first dripping medium CA into the hole, then pushing the horn in, then adding thin CA around the horn. Allow to dry. NOTE: Install all control horns on this airplane in this same way.
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Page 4: Fuselage/Tail Assembly
Repeat all of these steps 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 Install wheels onto axles 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 Locate the carbon wing-spar tube. Slide it into the fuselage tube. NOTE: Due to the high-performance nature of this airplane, the carbon wing tube must be a snug-fit into the wing and fuselage. It may be necessary to lubricate your wing tube from time to time. We recommend the use of non-stick cooking spray as a lubricant.
- Page 7 Locate the rudder. Measure 2 inches back from the front hinge line on the bottom of the rudder, and drill a 1/16 ” hole on the bottom. Using CA or epoxy glue, glue the tailwheel tiller keeper into the bottom of the rudder as shown.
- Page 8 Prepare the elevator halves. Install the control horns into the bottom of the elevator halves just as you installed the horns into the ailerons. Insert the elevators into the horizontal stabilizer. Check for 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.
- Page 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 Install the rudder servo into the fuselage as shown. The rudder pull-pull cables are assembled 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 Install the rudder pull-pull cables onto the rudder horn, feed the cables into the fuselage through the slots, and guide them to the front. The cables should cross over each other ONE time, making an X shape inside the fuselage. Make sure the cables do not become twisted. Assemble the forward ends of the pull-pull cables and attach them to the rudder servo horn, using the adjustors to set the tension.
- Page 12 Install the ESC as shown. If your ESC includes a switch, install into the fuselage side near the ESC. NOTE: Do not simply allow your ESC switch to flop around inside the fuselage. 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.
- Page 13 Your Yak kit includes a scale cowl baffle, it is attached to the cowl (if desired) with glue (we use thick CA, epoxy also works well). Align the baffle with the cowl, and use tape as shown to hold it in-place for gluing from the back side.
- Page 14 Remove the canopy hatch. Use THIN CA glue to attach one side of the Velcro to the battery tray as shown. Stick the opposite side of the velcro to your battery pack. Use at least 2 velcro straps to retain the battery in the airplane, as shown.
- Page 15 Scott’s Tip: Sealing Hinge Gaps Sealing hinge gaps is a discussion item that will draw as many unique responses as there are people. Some claim wild performance increases, while others consider the task unnecessary. With my full-scale experience to lean on, I think sealing the gaps is time well spent.
- Page 16 Scott’s Tip: Sealing Hinge Gaps Continued...
- Page 17 “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 your Yak, spare parts are available from 3DHobbyShop.com...