Seagull Models LANCAIR LEGACY User manual

“Graphics and specifications may change without notice”.
MS:160
ASSEMBLY MANUAL
Specifications:
Wingspan------------------------------70.9in(180cm).
Wingarea-----------------613.8sq.in(39.6sqdm).
Weight------------------------9.7-10.6lbs(4.4-4.8kg).
Length------------------------------58.8in(149.3cm).
Engine ------------------0.75-0.91cu.in-----2-stroke.
1.00-1.25cu.in -----4-stroke.
Radio-------------------6channelswith 11 servos.
Electricconversion:optional

LANCAIR LEGACY Instruction Manual.
2
INTRODUCTION.
Thank you for choosing the LANCAIR LEGACY ARTF by SEAGULL MODELS COMPANY LTD.
The LANCAIR LEGACY 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
usingbalsa,plywoodtomakeitstrongerthantheaverageARTF,yetthedesignallowstheaeroplane
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 LANCAIR LEGACY 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 LANCAIR LEGACY . Use the parts listing
below to identify all parts.
WARNING.
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.
IfyouareinexperiencedwithbasicR/CflightwestronglyrecommendyoucontactyourR/Csupplier
and join your local R/C Model Flying Club. R/C Model Flying Clubs offer a variety of training
proceduresdesignedtohelp the new pilotonhiswaytosuccessfulR/Cflight.Theywill also be able
to advise on any insurance and safety regulations that may apply.
KIT CONTENTS
1
22
33
10
49
6
6

3
www.seagullmodels.com
ADDITIONAL ITEMS REQUIRED.
0.75- 0.91 2-stroke.
1.00 - 1.25 4-stroke.
Computer radio with 11 servos.
Glow plug to suit engine.
Propeller to suit engine.
Protective foam rubber for radio
system.
TOOLS & SUPPLIES NEEDED.
Thick cyanoacrylate glue.
30 minute epoxy.
5 minute epoxy.
Hand or electric drill.
Assorted drill bits.
Modellingknife.
Straight edge ruler.
2mm ball driver.
Phillips head screwdriver.
220 grit sandpaper.
90° square or builder’s triangle.
Wire cutters.
Masking tape & T-pins.
Thread-lock.
Paper towels.
KIT CONTENTSTS HINGING THE FLAP .
C/AHinge.
T-pin.
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.
Note:
1) Carefully remove the flap from one of
thewingpanels.Notethepositionofthehinges.
2)Removeeachhingefrom the wing panel
andflapandplaceaT-pininthecenterofeach
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 flap is
mounted to the wing panel.
3) Slide the flap on the wing panel until
there is only a slight gap. The hinge is now
centered on the wing panel and flap. Remove
the T-pins and snug the flap against the wing
panel. A gap of 1/64” or less should be
maintained between the wing panel and flap.
SEA16001 Fuselage
SEA16002 Wing Set
SEA16003 Tail Set
SEA16004 Cowling
SEA16006 Landing Gear
SEA16007 Linkage Set
SEA16009 Canopy
SEA16010 Wing Tube
SEA16011 Decal Set
SEA16012 Hardware Pack
C/AHinge.

LANCAIR LEGACY Instruction Manual.
4
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.
2)Removeeachhingefrom the wing panel
and aileron and place a T-pin in the center of
each hinge. Slide each hinge into the aileron
untiltheT-pinis snug against the aileron.This
will help ensure an equal amount of hinge is
oneithersideofthe hinge line when the aileron
is mounted to the wing panel.
Note:
1) Carefully remove the aileron from one
of the wing panels. Note the position of the
hinges.
HINGING THE AILERON .
C/Aglue.
4)Deflect the flap and completely saturate
eachhingewiththinC/Aglue.Theaileronsfront
surface should lightly contact the wing during
this procedure. Ideally, when the
Thehingeisconstructed 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 flap.
hinges are glued in place, a 1/64” gap or less
will be maintained throughout the lengh of the
flap to the wing panel hinge line.
Note:
7) Repeat this process with the other wing
panel, securely hinging the flap in place.
6) Using C/A remover/debonder and a
papertowel,remove any excessC/Aglue that
may have accumulated on the wing or in the
flap hinge area.
5)Turn the wingpanelover and deflectthe
flapinthe opposite direction fromthe opposite
side.Apply thinC/Aglueto each hinge, making
sure that the C/A penetrates into both the flap
and wing panel.
8)Afterbothflap are securely hinged,firmly
grasp the wing panel and flap to make sure
the hinges are securely glued and cannot be
pulled out. Do this by carefully applying
medium pressure, trying to separate the flap
from the wing panel. Use caution not to crush
the wing structure.
Work the flap down several times to
“work in” the hinges and check for
proper movement.
Note:
C/AHinge.
C/AHinge.

5
www.seagullmodels.com
4) Deflect the aileron and completely
saturate each hinge with thin C/A glue. The
aileronsfrontsurfaceshouldlightlycontact 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.
Thehingeisconstructed 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.
Note:
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
shouldbe maintained between thewing panel
andaileron.
T-pin.
C/Aglue.
8)Afterbothailerons 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
papertowel,remove any excessC/Aglue that
may have accumulated on the wing or in the
aileronhinge area.
5)Turn the wingpanelover and deflectthe
aileron in the opposite direction from the
opposite side. Apply thin C/A glue to each
hinge,makingsure thattheC/Apenetratesinto
both the aileron and wing panel.
Workthe aileron up anddownseveral
times to “work in” the hinges and
check for proper movement.
Note:
C/AHinge.

LANCAIR LEGACY Instruction Manual.
6
Epoxy
Flap Fiberglass control horn.
HINGING THE ELEVATOR.
Glue the rudder hinges in place using the
same techniques used to hinge the ailerons.
HINGING THE RUDDER.
Glue the rudder hinges in place using the
same techniques used to hinge the ailerons.
Aileron Fiberglass control horn.
INSTALL THE AILERONS CONTROL
HORN.
Epoxy
Install the flap control horn using the same
methodassameas theaileron control horns.
INSTALL FLAP CONTROL HORN.
Fiberglass control horn.
Fiberglass control horn.
Epoxy
Epoxy
C/AHinge.

7
www.seagullmodels.com
INSTALL ELEVATOR CONTROL
HORN.
Epoxy
Epoxy
INSTALL RUDDER CONTROL HORN.
Epoxy.
Repeatsteps to install the rudder control horn
as same as steps done for ailerons.
Rudder Fiberglass control horn.
Thread locker glue.
ENGINE MOUNT INSTALLATION.
1) Locate the items necessary to install the
engine mount included with your model. .
2) Usefour4x30mmheadbolts and four 4mm
washers to attach the engine mount rails to
thefirewall.Tightenthe screws. Makesure to
use threadlock on the screws to help prevent
them from vibrating loose.
4x30mm.
Fiberglass control horn.
Fiberglass control horn.
Elevator Fiberglass control horn.

LANCAIR LEGACY Instruction Manual.
8
3) Carefully bend the second nylon tube
up at a 45º angle. This tube is the vent tube.
4) Test fit the stopper assembly into the
tank. It may be necessary to remove some of
the flashing around the tank opening using a
modeling knife. If flashing is present, make
sure none falls into the tank.
5) With the stopper assembly in place,
the weighted pick-up should rest away from
therear of the tank and move freely inside the
tank. The 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 satisfied with the alignment of
the stopper assembly tighten the 3 x 20mm
machine screw until the rubber stopper ex-
pands and seals the tank opening. Do not
overtighten the assembly as this could cause
the tank to split.
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
thetank is installedinside the fuselage, it may
be difficult to determine which is which.
FUEL TANK INSTALLATION.
 7) Slide the fuel tank into the fuselage. Guide
the lines from the tank through the hole in the
firewall.
Fueltank.
INSTALLING THE STOPPER ASSEMBLY.
2) Usinga modeling knife,cut one length
ofsiliconfuel line. Connect one endof the line
tothe weighted fuelpick up and theother end
to the nylon pick up tube.
1) Using a modeling knife, carefully cut
off the rear portion of one of the 3 nylon tubes
leaving 1/2” protruding from the rear of the
stopper. This will be the fuel pick up tube.
Venttube. Fuel pick up tube.
Fuel fill tube.
Balsa

9
www.seagullmodels.com
Blow through one of the lines to en-
sure the fuel lines have not become kinked
inside the fuel tank compartment. Air
should flow through easily.
9) Connect the lines from the tank to the engine
and muffler. The vent line will connect to the
muffler and the line from the clunk to the
carburetor.
Fueltank.
Venttube.
Fuel pick up tube.
Fuel fill tube.
Epoxy.
 8) Use plywood template to hold in place
the fuel tank with C/A glue to secure the fuel
tank inside the fuselage.
Balsa wood include.
INSTALLING THE FUSELAGE SERVOS.
Throttle servo.
Elevator servo.
THROTTLE SERVO ARM INSTALLATION.
Install adjustableservoconnectorinthe servo
arm as same as picture below:
AdjustableServo
connector.
Servoarm.
Loctite secure.
1PCS.
Throttleservoarm.
Elevatorservoarm.
RudderandSteeringservoarm.
1) Installthe rubber grommets and brass
colletsonto the throttle servo. Testfittheservo
into the aileron servo mount.
 2) Secure the servos with the screws pro-
vided with your radio system.
Because the size of servos differ, you
mayneedtoadjustthesizeoftheprecutopen-
ing in the mount. The notch in the sides of the
mount allow the servo lead to pass through.
Retract servo arm.
Retract servo .
RudderandSteering servo.

LANCAIR LEGACY Instruction Manual.
10
5) Slide the pushrod tube in the firewall and
guide it through the fuel tank mount. Use
medium C/A to glue the tube to the firewall and
the fuel tank mount.
6) Connect the Z-bend in the 600mm throttle
pushrod to the outer hole of the carburetor arm.
Pushrod tube hole.
3) Use a drill to drill the four holes in the engine
mount rails.
4) On the fire wall has the location for the
throttle pusshrod tube (pre-drill).
4mm.
4mm.
INSTALLING THE SWITCH.
3/32” Hole.
Installtheswitch into theprecuthole in the
side, in the fuselage.
Trim and cut.
Switch.
150mm.
MOUNTING THE ENGINE.
 1) Positiontheenginewiththe drivewasher
(150mm) forward of the firewall as shown.
2) Use a pin drill and 4mm drill bit to drill a
small indentation in the mount for the engine
mounting screw.

11
www.seagullmodels.com
7) Slide the throttle pushrod wire into the tube.
Position the engine between the mounts. Use
four M4x30mm machine screws to secure the
engine to the mount as shown.
Machinescrew M4x30mm. 9) Move the throttle stick to the closed position
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.
Screw.
Pushrodwire.
INSTALLING NOSE RETRACTABLE
LANDING GEAR.
8) Reinstall the servo horn by sliding the
connector over the pushrod wire. Center the
throttle stick and trim and install the servo horn
perpendicular to the servo center line.
Locate the items ceccessary to install the
Retractable landing gear as shown.
Trimand cut.
Pushrodwire.

LANCAIR LEGACY Instruction Manual.
12
Screw.
Screw.
1) Install Wheel.
2) Install Nose landing gear at the Fuselage.
Axle.
Nose Retractable landing gear.
Axle.
Wheel Collar.
Axle.
Wheel Collar.
Wheel.
2mm.
Pen.
Drill :2mm.

13
www.seagullmodels.com
2
Crimp.
Cable end.
M3clevis.
Metalconnector.
M3x15mm.
Screw.
3) Install Retractable landing gear pushrod.
Retract pushrod.
M2 lock nut.
M2clevis.
30mm.
1
1
2
CableSteering.

LANCAIR LEGACY Instruction Manual.
14
Trim and cut.
COWLING.
Trim and cut.
1)Slidethefiberglasscowl over the engine
and line up the back edge of the cowl with the
marksyoumadeonthe fuselage then trim and
cut as shown.
Trim and cut.
Becauseofthe size ofthe cowl, it maybe nec-
essaryto use aneedle valve extension for the
highspeedneedle valve. Make this outofsuf-
ficient length 1.5mm wire and install it into the
end of the needle valve. Secure the wire in
placeby tightening theset screw inthe side of
the needle valve.
2) While keeping the back edge of the
cowl flush with the marks, align the front of
thecowlwiththecrankshaftoftheengine. The
front of the cowl should be positioned so the
crankshaft is in nearly the middle of the cowl
opening.Usethe spinner backplateasaguide.
Hold the cowl firmly in place using pieces of
masking tape.
Needlevalve.
Machine screw M3x10mm.
M3x10mm.

15
www.seagullmodels.com
 3) Install themuffler and muffler extension
onto the engine and make the cutout in the
cowl for muffler clearance. Connect the fuel
and pressure lines to the carburetor, muffler
and fuel filler valve. Secure the cowl to fuse-
lage using the 3x10mm screws to tighten the
screws.
3) Attach the motor to the front of the electric
motor box using four 4mm blind nut, four
M4x20mm hex head bolts to secure the motor.
Please see picture shown.
Blindnut.
4mm.
ELECTRIC POWER CONVERSION
1) Locate the items neccessary to install the
electric power conversion included with your
model.
2) Attach the electric motor box to the firewall
suitable with the cross lines drawn on the electric
motor box and firewall. Using epoxy and balsa
stick to secure the motor box to the
firewall.Please see pictures below.
M4x20mm.
Recommen the items neccssary to install the
electric power conversion parts included with
your model.
- Model size: .75-.90 size models
- Motor: 50mm 310 rev per volt
- Propeller: 15x10 ~ 16x10
- ESC: 60A
- Lipo Batteries: 8 cell 3200mA

LANCAIR LEGACY Instruction Manual.
16
INSTALLING THE SPINNER.
Install the spinner backplate, propeller and
spinner cone.
The 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.
M4x20mm
Balsa sticks
150mm.
4) Locate the plywood battery tray to the
fuselage. Tighten the screws using machine
screws M3x15mm to secure the tray in position.
Epoxy ElectricMotor
Epoxy
Tie wraps
Speed control.
5) 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 motor. Make sure the leads will
not interfere with the operation of the motor.
Battery.

17
www.seagullmodels.com
INSTALLING THE AILERON - FLAPSERVOS.
String.
Small weight.
2) Place the servo between the mounting
blocksandspace itfromthehatch.Usea pencil
to mark the mounting hole locations on the
blocks.
Servos. Smallweight.
Thread.
1) Usinga small weight(Weighted fuel pick-up
workswell)andstring, feed the string through
the wing as indicated.
Because the size of servos differ, you
mayneedto adjust thesizeoftheprecutopen-
ing in the mount. The notch in the sides of
themountallowtheservo leadtopassthrough.
3) Use drill bit in a pin vise to drill the mouting
holes in the blocks.
4) Apply 2-3 drops of thin C/A to each of the
mounting holes. Allow the C/A to cure without
using accelerator.
5) Use dental floss to secure the connection
so they cannot become unplugged.
6) Secure the servo to the aileron hatch using
Phillips screwdriver and the screws provided
with the servo.

LANCAIR LEGACY Instruction Manual.
18
7) Apply 1-2 drops of thin C/A to each of the
mounting tabs. Allow the C/A to cure without
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
servoextensionlead. Pull the leadthrough the
wing and remove the string. Electric wire.
Small weight. String.
String.

19
www.seagullmodels.com
9) Set the aileron hatch in place and use a
Phillips screw driver to install it with four wood
screws. Wing.
Aileron.
M2lock nut.
AILERONPUSHROD HORN INSTALLATION
M2 lock nut.
M2clevis.
30mm.
70mm.
INSTALLING THE FLAP SERVO
Repeat the procedure for the aileron servo.
Wing.
Flap.
M2lock nut.
Aileron.
Wing.
Aileron.
Repeat the procedure for the other aileron servo.
Wing.
M2x10mm.

LANCAIR LEGACY Instruction Manual.
20
M3x15mm.
INSTALLING RETRACTABLE
LANDING GEAR.
1) Locate the items necessary to install the
retractable landing gear as shown.
2) Install Retractable landing gear at the Wing.
3) Install Wheel.
Screw.
2mm.
Pen.
2mm.
Wheel.
Washer