RC Factory Yak 55 User manual

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Complete set Yak 55 – Instructions
In this manual we are going to build a complete Yak 55 airplane. Part of the set is the key equipment that the
pilot needs to fly the EPP airplane.

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In the set you can find:
•Yak 55 airplane
•RC radio with receiver
•Motor
•Serva
•ESC
•Propeller
•Batteries
•Charger
•Glue
•Activator
You will need:
•4x AA batteries
•Hobby Knife
•Small Phillips and Flat Screwdriver
•Small pliers or tweezers
•Lighter or hot air gun
•A piece of sandpaper
•Triangle
•Enough space
•For optional landing gear 2mm drill
Airplane construction
First, prepare the individual EPP parts of the airplane that will bend. These are the ailerons, rudder, and
elevator.

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Fold the parts and load them evenly. You can use books, for example. Leave the parts for about 1-2 hours. In the
meantime, prepare a space to build the plane. You will need a free table. Since the plane is primarily glued, it is
good to cover the table with a piece of plastic, which will protect the table and prevent the airplane from
sticking to the table.
Prepare the electronics. Unpack the servos, radio with receiver and ESC. Put batteries in the radio. If the radio is
not paired with the receiver, pair them.
On the radio, put the throttle down and switch all the switches to the upper position. Press and hold the bind
button and turn on the radio. RXBinding should appear on the display.

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Connect the pairing cable to the pins labeled B/VCC on the edge of the receiver. Connect the servo wire from
ESC to any position to power the receiver. The orientation of the connector is important. The signal wire (yellow)
must face the center of the receiver. Finally, connect the battery. The radio should respond to the receiver and
the pairing is complete. Disconnect the battery, remove the pairing cable, and turn off the radio.
Now connect also the servos to the receiver (one is missing in the picture). We will use the first 4 channels CH1,
CH2, CH3 and CH4. Then turn on the radio, put the throttle in the center position and plug the battery into the
ESC. After connecting the radio with the receiver, the servos are centered.

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After 1-2 hours, when the parts were loaded, it should be possible to move the ailerons freely without
resistance. Prepare the center part of the plane and take out the cuttings.

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Let's start with gluing the wing. The wings have differently sized semicircular protrusions. Therefore, it should
not happen that you glue the wings in reverse. Apply the activator to the middle part of the plane and glue on
the wing then press them firmly together. Be careful not to glue the ailerons. We apply the same procedure to
the second wing.

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After gluing the wings, take a knife and cut through the groove that runs through both wings and the center.
Then glue a wooden reinforcement into the groove. The reinforcement fits into the wing precisely and should
not stick out on either the top or bottom side.
Apply glue to the reinforcement from both sides, insert it into the groove, spray it with an activator and press
the EPP around it firmly.

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Next, install the elevator. Spray the elevator with an activator, apply glue to the central part and press tightly.
There are protrusions on the elevator and the central part, thanks to which it should not be possible to glue the
elevator in reverse.

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Take the D10M servo and insert it from below into the prepared cutout in the central part. Secure the servo with
glue. Drop the glue in the corners of the servo and spray it with an activator.
After gluing the servo, glue the lower part of the airplane to the center part. Be careful not to glue the moving
part of the servo. Using a triangle, make sure that the lower part is glued perpendicularly to the center along
the entire length of the airplane. Then spray the joint with an activator.

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Now glue the black struts. Spray the bottom of the airplane with an activator and apply glue to the struts. On
one edge (which will be in front) leave about 8cm of struts without the glue. The front part of the glue-free strut
begins at the line that is drawn in front of the airplane in front of the wooden reinforcement.

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Turn the plane over and insert the Volta DM14 servo, which will control the ailerons. Stretch the cable to the
underside of the airplane. Then secure the servo from the sides with glue and spray it with an activator.

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Put together the lever for the servo to control the ailerons. The package includes more 3D printed parts for use
with other types of servos. The wider part of the lever goes to the place marked by the groove. Take a lever
from the D14M servo and insert it into the prepared 3D print. Apply some glue and cover the lever with the
smaller 3D printed part.

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Now put blimps (that metal thing with a pin) into the 3D printing according to the pictures. Secure the blimp
sufficiently with snap ring so that it does wiggle, but it can be rotated freely. The snap ring goes to the pin
stiffly, so you need to use a little force.

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Put the lever on the center servo according to the picture. Make sure that the servo has not moved and is in the
center position. The lever should be as straight as possible (within the capabilities of the teeth on the servo).
Finally, lock the lever with a screw. Select a smaller metric screw from the package. Press the EPP with a
screwdriver and bend it to the side so that you can screw the screw in.

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Prepare the levers for the ailerons. Split the set of levers with a knife and glue the lever into the prepared hole
in the aileron on the bottom side. The entire bottom of the lever should be hidden in the wing and not stick out.
We repeat for the second aileron.

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Prepare the rods. Take 2 shorter rods, heat shrink and plastic forks (ends). Separate 2 plastic forks.
Roughen the 1cm of the sticks with sandpaper and apply glue. Then glue sticks to forks. There is a groove on the
fork into which the rod will fit. When the rod is in place, spray it with an activator and put on piece of heat
shrink. Shrink it carefully with a lighter or hot air gun.

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First, stretch the rod through the servo lever and put a screw in the blimp. Do not tighten the screw yet.
Click the fork into the lever on the ailerons from the outer side. Make sure that the aileron is straight and
tighten the screw in the blimp.

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Repeat the same procedure on the other wing.
Prepare the guides. Use only half of the guide set now.