Seagull Models YAK 54 User manual

Specications:

Wingspan --------------- 73 in (185.0 cm)

Wing Area -------------- 996.3 sp.in (64.3 dm²)

Weight ------------------ 11.5-12.3 lbs (5.2-5.6 kg)

Length ------------------ 65.7 in (167.0 cm)

Engine ------------------ 35-40cc

Servo-------------------- 5 channels 6 servos

Motor 180/ 3000-3500watt/ ESC 80A-120A/ Lipo

12s 3300-4200mAh

Electric propeller 20x8-21x10

ASSEMBLY MANUAL

Code : SEA 360

YAK 54 Instruction Manual.

ank you for choosing the YAK 54 ARTF by SG MODELS. e YAK 54 was designed

with the intermediate/advanced sport yer in mind. It is a semi scale airplane which is easy

to y and quick to assemble. e airframe is conventionally built using balsa, plywood

to make it stronger than the average ARTF, yet the design allows the aeroplane to be kept

light. You will nd that most of the work has been done for you already. e motor mount

has been tted and the hinges are pre-installed. Flying the YAK 54 is simply a joy.

is instruction manual is designed to help you build a great ying aeroplane. Please read

this manual throughly before starting assembly of your YAK 54 Use the parts listing below

to indentify all parts.

If you are inexperienced with basic R/C ight we strongly recommend you contact your

R/C supplier and join your local R/C model Flying Club. R/C Model Flying Clubs oer a

variety of training procedures designed to help the new pilot on his way to successful R/C

ight. ey will also be able to advise on any insurance and safety regulations that may

apply.

Please be aware that this aeroplane is not a toy and if assembled or used incorrectly it is

capable of causing injury to people or property. WHEN YOU FLY THIS AEROPLANE

YOU ASSUME ALL RISK & REPONSIBILITY.

INTRODUCTION

WARNING

KIT CONTENTS

SEA360 YAK 54

1. Fuselage

2. Wing set (2)

3. Tail set (2)

4. Cowling

5. Wing tube

6. landing gear

7. Fuel tank

8. Tail whee

9. Spinner

ADDITIONAL ITEMS REQUIRED

TOOLS & SUPPLIES NEEDED

in cyanoacrylate glue.

Medium cyanoacrylate glue.

30 minute epoxy.

5 minute epoxy.

Hand or electric drill.

Assorted drill bits.

Modelling knife.

Straight edge ruler.

2mm ball driver.

Phillips head screwdriver.

220 grit sandpaper.

90° square or builder’s triangle.

Wire cutters.

Masking tape & T-pins.

read-lock.

Paper towels.

�35-40cc gasoline engine.

�Computer radio 5 channel with 6

servos.

�Glow plug to suit engine.

�Propeller to suit engine 20x8-21x10.

�Protective foam rubber for radio

system.

HINGING THE AILERON

Prepare the aileron hinges by scung

the area that will be inserted into the

wing or ﬂying surface with medium grit

sand paper. Be careful not to remove

too much material. Use isopropyl al-

chol, and a paper towel to remove any

excess debris that remains on the hinges.

Mix a sucient amount of 30-min-

ute epoxy in a cup, and with a tooth-

pick, smear epoxy in the hinge pockets

of the wing panel and aileron. Slowly

and carefully, insert each hinge into the

wing panel. Partially remove and re-

install the hinge to ensure that you’ve

completely coated it with glue. Clean up

any excess epoxy with isopropyl alco-

hol, and tape the aileron in place to cure.

Note : e control surfaces, including the ailer-

ons, elevators, and rudder, are prehinged with

hinges installed, but the hinges are not glued in

place. It is imperative that you properly adhere

the hinges in place per the steps that follow us-

ing a high-quality thin C/A glue.

Carefully remove the aileron from one

of the wing panels. Note the position of

the hinges.

YAK 54 Instruction Manual.

Hinge

Press the aileron and wing together such

that less than a 1/64” hinge line gap exists

between the aileron and wing. e bevels

should virtually touch. Use a paper towel

and rubbing alcohol to wipe away any

visible epoxy around the hinges.

Allow the glue to fully cure for at least 6

hours.

When fully cured, move each control

surface throughout is travel range server-

al times to break away any epoxy in the

hinge. Be sure to deect the surface fully.

Note : Work the aileron up and down sev

eral times to “work in” the hinges and check

for proper movement.

Epoxy

INSTALL THE AILERONS

CONTROL HORN

Fiberglass control horn

Prepare the aileron control horns by sand-

ing the section that extends into the control

surface with medium grit sand paper. Use iso-

propyl alcohol and a paper towel to remove

any excess debris from the control horn.

Epoxy

YAK 54 Instruction Manual.

INSTALLING THE AILERON SERVOS

Minimum servo spec.

Torque : 333.00 oz-in (23.98 kg-cm) @

6.0V; oz-in (29.02 kg-cm) @ 7.4V

Attach the extension to the servo lead

and secure with Safety Clip, safety wire,

tape or other method. Ensure the plugs

will not come apart from vibration or

light tension.

Fasten the pull string from the servo

hole to the male plug of the servo exten-

sion.

Layout the servo on the wing to test ﬁt

the installation and ensure servo lead is

he correct length.

NOTE : servos arm for aileron is not

provided from manufacturer.

Fiberglass control horn

Epoxy

Please study images below.

Install servo with servo mounting

screws.

in CA

38mm

INSTALLING THE AILERON PUSHROD

Please study images below.

YAK 54 Instruction Manual.

Repeat all the above steps for the other

wing.

INSTALL HINGE FOR STABILIZER

AND ELEVATOR

95mm

Please study images below.

Epoxy

INSTALL ELEVATOR CONTROL HORN

6.10.

5.9.

Fiberglass control horn

Epoxy

YAK 54 Instruction Manual.

10.

Epoxy

You cut horizontal tail sevor hole.

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