Seagull Models Maxi Lift SEA209N User manual

1
ASSEMBLY MANUAL
Code: SEA209N
“ Graphics and specications may change without notice “ .
Specications:
Wingspan---------------- 87.6 in ----------------- 222.2 cm.
Wing area--------------- 1072.6 sq.in ----------- 69.2 sq.dm.
Length-------------------- 61.2 in------------------ 155.5 cm.
Recommended engine size 33cc.
Radio---------------------- 7 channels with 10 servos.
Flying skill level intermediate/ advanced.
Weigth------------------- 16.3 lbs----------------- 7.4 kg.

Instruction Manual.
2
ank you for choosing the MAXI LIFT ARF by SG MODELS . e MAXI LIFT was de-
signed 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 ARF, 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 MAXI LIFT 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 MAXI LIFT. Use the parts listing below to
indentify 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 & REPONSIBILITY.
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.
INTRODUCTION.
WARNING.
KIT CONTENTS.
1
2 2
3 3
4
5
6
7
8
9
Maxi Lift 87.6" wingspan, 33cc

3
KIT CONTENTS.
ADDITIONAL ITEMS REQUIRED.
0.75- 0.91 2-stroke.
0.91-1.25 4-stroke.
33cc gasoline engine.
Computer radio 7 channels with
10 servos.
Glow plug to suit engine.
Propeller to suit engine.
Protective foam rubber for radio
system.
TOOLS & SUPPLIES NEEDED.
ick 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.
HINGING THE FLAP.
SEA209N Maxi Lift 87.6"wingspan, 33cc
SEA20902 Wing Set
SEA20903 Tail Set
SEA20904 Fiberglass Cowling
SEA20905 Canopy
SEA20906 Landing Gear
SEA20907 Wheels
SEA20908 Wing struts
SEA20909 Pilot
.
M2x10mm.
.
M2x10mm.

Instruction Manual.
4
HINGING THE ELEVATOR.
Note : e control surfaces, including the ai-
lerons, elevators, and rudder, are prehinged
with hinges installed, but the hinges are not
glued in place. It is imperative that you prop-
erly adhere the hinges in place per the steps
that follow using a high-quality thin C/A glue.
1) Carefully remove the aileron from one
of the wing panels. Note the position of the
hinges.
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 wing
panel until the T-pin is snug against the wing
panel. is will help ensure an equal amount
of hinge is on either side of the hinge line
when the aileron is mounted to the aileron.
3) Slide the wing panel on the aileron until
there is only a slight gap. e hinge is now
centered on the wing panel and aileron. Re-
move 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 and
aileron.
4) Deect the aileron and completely satu-
rate each hinge with thin C/A glue. e ailer-
ons front surface should lightly contact the
wing during this procedure. Ideally, when
the hinges 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.
NOTE : e hinge is constructed of a spe-
cial 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.
Epoxy.
5) Turn the wing panel over and deect 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.
6) Using C/A remover/debonder and a pa-
per towel, remove any excess C/A glue that
may have accumulated on the wing or in the
aileron hinge area.
Epoxy.
Hinge.
Maxi Lift 87.6" wingspan, 33cc

5
HINGING THE RUDDER.
Glue the rudder hinges in place using the
same techniques used to hinge the ailerons.
INSTALL THE AILERONS
CONTROL HORN.
Fiberglass control horn.
Hinge.
7) Repeat this process with the other wing
panel, securely hinging the aileron in place.
8) Aer both ailerons are securely hinged,
rmly grasp the wing panel and aileron to
make sure the hinges are securely glued and
cannot be pulled out. Do this by carefully ap-
plying medium pressure, trying to separate
the aileron from the wing panel. Use caution
not to crush the wing structure.
Work the aileron up and down sev-
eral times to “work in” the hinges
and check for proper movement.
Note :
Aileron control horn.
Epoxy.
.
INSTALL FLAP CONTROL HORN.
.
.
Install the ap control horn using the same
method as same as the aileron control horns.
Fiberglass control horn.
Epoxy.
Epoxy.

Epoxy.
Aileron control horn.
Instruction Manual.
6
.
.
.
INSTALL ELEVATOR CONTROL HORN.
Fiberglass control horn.
INSTALL RUDDER CONTROL HORN.
Repeat steps to install the rudder control
horn as same as steps done for ailerons.
Epoxy.
Aileron control horn.
Epoxy.
.
Rudder control horn.
Epoxy.
INSTALLING THE MAIN
LANDING GEAR.
1) e blind nuts for securing the landing
gear are already mounted inside the fuselage.
2) Using the hardware provided, mount the
main landing gear to the fuselage.
Epoxy.
Maxi Lift 87.6" wingspan, 33cc

Collar.
Collar.
7

Instruction Manual.
Maxi Lift 87.6" wingspan, 33cc
8

9
INSTALLING THE FUSELAGE SERVOS.
Because the size of servos dier, you may
need to adjust the size of the precut opening
in the mount. e notch in the sides of the
mount allow the servo lead to pass through.
1) Install the rubber grommets and brass
collets onto the throttle servo. Test t the
servo into the aileron servo mount.
2) Secure the servos with the screws provid-
ed with your radio system.
Minimum servo spec.
Torqu e : 115.3 oz-in (8.3 kg-cm) @ 4.8V;
157.8 oz-in (11.3 kg-cm) @ 6.0V
180.1 oz-in (12.9 kg) @ 7.4V
4x20mm.

Instruction Manual.
10
INSTALLING THE SWITCH.
Install the switch into the precut hole in
the side, in the fuselage.
3/32” Hole.
.
.
Trim and cut.
Switch for engine.
Trim and cut.
Rudder servo.
Servo tow.
Servo capping.
Elevator servo arm.
Maxi Lift 87.6" wingspan, 33cc

11
Switch for receiver.
MOUNTING THE ENGINE.
1) Please see below pictures.
2) Use a pin drill and 5mm drill bit to drill a
small indentation in the mount for the en-
gine mounting screw.
3) Use a drill to drill the four holes in the
engine mount rails.
4) On the re wall has the location for the
throttle pusshrod tube (pre-drill).
5) Slide the pushrod tube in the rewall and
guide it through the fuel tank mount. Use
medium C/A to glue the tube to the rewall
and the fuel tank mount.
6) Connect the Z-bend in the 600mm throt-
tle pushrod to the outer hole of the carbure-
tor arm.
7) Slide the throttle pushrod wire into
the tube. Position the engine between the
mounts. Use four M5x90mm machine screws
to secure the engine to the mount as shown.
5mm.
180mm.

Instruction Manual.
12
8) Move the throttle stick to the closed posi-
tion and move the carburetor to closed. Use
a 2.5mm hex wrench to tighten the screw
that secures the throttle pushrod wire. Make
sure to use threadlock on the screw so it does
not vibrate loose.
INSTALLING THE STOPPER
ASSEMBLY.
1) Using a modeling knife, carefully cut o
the rear portion of one of the 3 nylon tubes
leaving 1/2” protruding from the rear of the
stopper. is will be the fuel pick up tube.
2) Using a modeling knife, cut one length of
silicon fuel line. Connect one end of the line
to the weighted fuel pick up and the other
end to the nylon pick up tube.
THROTTLE SERVO ARM
INSTALLATION.
Install adjustable servo connector in the
servo arm as same as picture below:
Loctite secure. Adjustable Servo
connector.
Servo arm.
1 PCS
Maxi Lift 87.6" wingspan, 33cc

13
Vent tube. Fuel pick up tube.
Fuel fill tube.
3) Carefully bend the second nylon tube up
at a 45º angle. is tube is the vent tube.
4) Test t the stopper assembly into the tank.
It may be necessary to remove some of the
ashing around the tank opening using a
modeling knife. If ashing is present, make
sure none falls into the tank.
5) With the stopper assembly in place, the
weighted pick-up should rest away from the
rear of the tank and move freely inside the
tank. e top of the vent tube should rest just
below the top of the tank. It should not touch
the top of the tank.
6) When satised with the alignment of the
stopper assembly tighten the 3 x 20mm ma-
chine screw until the rubber stopper expands
and seals the tank opening. Do not over-
tighten the assembly as this could cause the
tank to split.
FUEL TANK INSTALLATION.
You should mark which tube is the vent
and which is the fuel pickup when you attach
fuel tubing to the tubes in the stopper. Once
the tank is installed inside the fuselage, it may
be dicult to determine which is which.
7) Slide the fuel tank into the fuselage. Guide
the lines from the tank through the hole in
the rewall.
8) Use plywood template to hold in place the
fuel tank with C/A glue to secure the fuel
tank inside the fuselage.
Fuel tank.
Set of ignition.

Instruction Manual.
14
Blow through one of the lines to ensure
the fuel lines have not become kinked inside
the fuel tank compartment. Air should ow
through easily.
9) Connect the lines from the tank to the en-
gine and muer. e vent line will connect
to the muer and the line from the clunk to
the carburetor.
Vent tube.
Fuel pick
up tube. Fuel ll tube.
COWLING.
1) Slide the berglass cowl over the engine
and line up the back edge of the cowl with
the marks you made on the fuselage then
trim and cut as shown.
Because of the size of the cowl, it may be nec-
essary to use a needle valve extension for the
high speed needle valve. Make this out of suf-
cient length 1.5mm wire and install it into
the end of the needle valve. Secure the wire in
place by tightening the set screw in the side of
the needle valve.
Maxi Lift 87.6" wingspan, 33cc

15
2) While keeping the back edge of the cowl
ush with the marks, align the front of the
cowl with the cranksha of the engine. e
front of the cowl should be positioned so the
cranksha is in nearly the middle of the cowl
opening. Use the spinner backplate as a
guide. Hold the cowl rmly in place using
pieces of masking tape.
3) Install the muer and muer extension
onto the engine and make the cutout in the
cowl for muer clearance. Connect the fuel
and pressure lines to the carburetor, muer
and fuel ller valve. Secure the cowl to fuse-
lage using the M3x10mm screws.
Machine screw M3x10mm.
ELECTRIC POWER CONVERSION.
Locate the items neccessary to install
the electric power conversion included
with your model.
Recommend the items necessary to in
stall the electric power conversion parts
included with your model.
Attach the electric motor box to the
rewall suitable with the cross lines
drawn on the electric motor box and re-
wall. Using epoxy and balsa stick to se-
cure the motor box to the rewall. Please
see pictures below.
- Motor: 160 - 2700 Watts
- Propeller: 18x8 ~ 20x10
- ESC: 70A - 100A
- 9-10S Lipo

Attach the motor to the front of the
electric motor box using four 5mm blind
nut, four M5x30mm hex head bolts to se-
cure the motor. Please see picture shown.
Instruction Manual.
5mm.
en, use 6mm drill bit to enlarge the
holes on the electric motor box.
6mm.
Blind nut.
Epoxy.
180mm.
Epoxy.
Balsa stick.
M5x30mm and washers.
16
M5x25mm.
Maxi Lift 87.6" wingspan, 33cc

Attach the speed control to the side
of the motor box using two-sided tape
and tie wraps. Connect the appropriate
leads from the speed control to the mo-
tor. Make sure the leads will not interfere
with the operation of the motor.
Speed control.
Battery
INSTALLING THE SPINNER.
Install the spinner backplate, propeller and
spinner cone.
e propeller should not touch any part
of the spinner cone. If it does, use a sharp
modeling knife and carefully trim away the
spinner cone where the propeller comes in
contact with it.
INSTALLING THE AILERON - FLAP
SERVOS.
Servos .Small weight.
Thread .
17
Minimum servo spec.
Torqu e : 115.3 oz-in (8.3 kg-cm) @ 4.8V;
157.8 oz-in (11.3 kg-cm) @ 6.0V
180.1 oz-in (12.9 kg) @ 7.4V

Instruction Manual.
18
1) Using a small weight (Weighted fuel pick-
up works well) and string, feed the string
through the wing as indicated.
.
4) Apply 2-3 drops of thin C/A to each of the
mounting holes. Allow the C/A to cure with-
out using accelerator.
5) Use dental oss to secure the connection
so they cannot become unplugged.
.
2) Place the servo between the mounting
blocks and space it from the hatch. Use a
pencil to mark the mounting hole locations
on the blocks.
3) Use drill bit in a pin vise to drill the mout-
ing holes in the blocks.
6) Secure the servo to the aileron hatch using
Phillips screwdriver and the screws provided
with the servo.
7) Apply 1-2 drops of thin C/A to each of the
mounting tabs. Allow the C/A to cure with-
out using accelerator.
8) A string has been provided in the wing
to pull the aileron lead through to the wing
root. Remove the string from the wing at
the servo location and use the tape to attach
it to the servo extension lead. Pull the lead
through the wing and remove the string.
Because the size of servos dier, you may
need to adjust the size of the precut opening in
the mount. e notch in the sides of the mount
allow the servo lead to pass through.
Maxi Lift 87.6" wingspan, 33cc

19
9) Set the aileron hatch in place and use a
Phillips screw driver to install it with four
wood screws.
M3 lock nut.
M3 clevis.
100mm.
AILERON PUSHROD NSTALLATION.
INSTALLING THE FLAP SERVO.
Repeat the procedure for the aileron servo.
Wing

Instruction Manual.
20
.
M3 lock nut.
M3 clevis.
90mm.
Wing
.
Screw the aero-tow mechanism into the
hole just behind the canopy, and apply
thread-lock uid to prevent the coupling and
nut from working loose.
e aluminium part must be shortened
enough so that the clevis can move freely,
adjust the rods accordingly.
INSTALLING THE HATCH OF BELLY
FUSELAGE.
INSTALLING TOW RELEASE FOR
SAIL PLANE. It is best to operate the aero-tow release
mechanism using a momentary switch
mounted on the joystick. e servo travel
must be set accordingly.
Maxi Lift 87.6" wingspan, 33cc