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Wing span ----------------------------36.6 in ( 93cm).
Wing area ----------------- 229.4 sq.in ( 14.8sq dm).
Weight ----------------------- -2.2 lbs ( 1.0 kg).
Length ------------------------------29.6 in ( 75.2 cm).
Speed control (ESC) ------------------ 30A-40A amp.
Motor -------------------------------480-Power 10.
Radio ------------------- 4 channels with 4 mini servos.
Battery 3-cell 1800mAh to 2100mAh Li-Po
10 x 5E Electric Prop.
“Graphics and specifications may change without notice”.
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EXTRA EA300L EP Instruction Manual.
Thank you for choosing the EXTRA EA300L EP ARTF by SEAGULL MODELS COMPANY LTD. The
EXTRA EA300L EP was designed with the intermediate/advanced sport flyer in mind. It is a semi
scale airplane which is easy to fly and quick to assemble. The 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 find that most of the work has been done for you already.The motor mount has
been fitted and the hinges are pre-installed . Flying the EXTRA EA300L EP is simply a joy.
This instruction manual is designed to help you build a great flying aeroplane. Please read this
manual thoroughly before starting assembly of your EXTRA EA300L EP . Use the parts listing below
to identify all parts.
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 & RESPONSIBILITY.
If you are inexperienced with basic R/C flight we strongly recommend you contact your R/C supplier
and join your local R/C Model Flying Club. R/C Model Flying Clubs offer a variety of training
procedures designed to help the new pilot on his way to successful R/C flight. They will also be able
to advise on any insurance and safety regulations that may apply.
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2 Wing set
3 Tail set
7 Wheel pants
9 Landing gear
ADDITIONAL ITEMS REQUIRED.
Motor 480- power 10
4 channel radio with 4 mini servos
Propeller to suit engine
Propeller to suit motor
The control surfaces, including the
ailerons, 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 using a high-quality
thin C/A glue.
HINGING THE AILERONS .
1) Carefully remove the aileron from one
of the wing panels. Note the position of the
2) Remove each hinge from the wing panel
and aileron and place a T-pin in the center of
each hinge. Slide each hinge into the aileron
until the T-pin is snug against the aileron. This
will help ensure an equal amount of hinge is
on either side of the hinge line when the aileron
is mounted to the wing panel.
TOOLS & SUPPLIES NEEDED.
Thick cyanoacrylate glue
30 minute epoxy
5 minute epoxy
Hand or electric drill
Assorted drill bits
Straight edge ruler
2mm ball driver
Phillips head screwdriver
220 grit sandpaper
90° square or builder’s triangle
Masking tape & T-pins
3) Slide the aileron on the wing panel until
there is only a slight gap. The hinge is now
centered on the wing panel and aileron.
Remove the T-pins and snug the aileron
against the wing panel. A gap of 1/64” or less
should be maintained between the wing panel
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EXTRA EA300L EP Instruction Manual.
8) After both ailerons are securely hinged,
firmly grasp the wing panel and aileron to
make sure the hinges are securely glued and
cannot be pulled out. Do this by carefully
applying medium pressure, trying to separate
the aileron from the wing panel. Use caution
not to crush the wing structure.
7) Repeat this process with the other wing
panel, securely hinging the aileron in place.
6) Using C/A remover/debonder and a
paper towel, remove any excess C/A glue that
may have accumulated on the wing or in the
aileron hinge area.
5) Turn the wing panel over and deflect the
aileron in the opposite direction from the
opposite side. Apply thin C/A glue to each
hinge, making sure that the C/A penetrates into
both the aileron and wing panel.
Work the aileron up and down several
times to “work in” the hinges and
check for proper movement.
HINGING THE ELEVATORS.
1) Locate the item for this section of the
4) Deflect the aileron and completely
saturate each hinge with thin C/A glue. The
ailerons front surface should lightly contact the
wing during this procedure. Ideally, when
thehinges are glued in place, a 1/64” gap or
less will be maintained throughout the lengh
of the aileron to the wing panel hinge line.
The hinge is constructed of a special
material that allows the C/A to wick
or penetrate and distribute
throughout the hinge, securely
bonding it to the wood structure of
the wing panel and aileron.