THE WORLD MODELS Spot-On 50 User manual

A249LPO27471203
Aeroba t ics

Wing Span
WingArea
Flying Weight
Fuselage Length
53.5 in / 1 0 mm
53 sq in / 34 sq dm
5. lb / 2 0 g
in / 1 mm
8 .7
3 40
57 450
36
INSTRUCTION MANUAL
Specifications
0.52-0.72 cu.in. displacement 4-stroke
Requires : 4-channel radio w / 5 standard servos
Warning !This model is not a toy.
It is designed for maximum performance. Please seek advice if one is not familiar with this kind
of engine powered precision model. Operating this model without prior preparation may cause
injuries. Remember, safety is the most important thing. Always keep this instruction manual at
hand for quick reference.
* Specifications are subject to change without notice.*
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The World Models
Manufacturing Co LTD., .
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ALMOST-READY-TO-FLY (ARF) SERIES
MADE INCHINA
FACTORYPRE-FABRICATED
(A249L)

A249LPO27471203
INDEX
BEFORE YOU BEGIN
BEFORE YOU BEGIN
PARTS LIST
ASSEMBLY
SAFETY PRECAUTIONS
P.1
P.2
P.3-P.11
P.11
Check all parts. If you find any defective or missing parts contact your local dealer. Please
DRY FIT and check for defects for all parts that will require CAor Epoxy for final assembly.
Any parts you find to be defective after the gluing process may be difficult to remove for
warranty replacement. The manufacturer will replace any defective parts, but will not extend
to the parts that are good before gluing to defective parts during assembly. Warranty will
not cover any parts modified by customer.
Symbols used throughout this instruction manual comprise of the following :-
Read through the manual before you begin, so you will have an overall idea of what to do.
1
2
3
P.1
Cut off shaded portion.
Ensure smooth non-binding
movement while assembling.
Apply instant glue
(C.A.glue, super glue.)
Assemble left and right
sides the same way.
Peel off shaded portion
covering film.
Pay close attention here!
Apply epoxy glue.
Must be purchased separately !
Drill holes with the specified
diameter (here: 3mm). Pierce the shaded portion
covering film.
3mm
Do not overlook this symbol !
Warning!
Apply thread locker
Aeroba t ics


A249LPO27471203
P.3
Parts List
1. MAIN WING -- 1 pair
2. SCREW PB2x22mm -- 4 pcs
PUSHROD Ø1.8x80mm w/ Threads (ForAileron) -- 2 pcs
CLEVIS PL4112103 -- 2 pcs
STRAPER PL4112102 -- 2 pcs
FUEL TUBE Ø6x5mm -- 4 pcs
HORN PL4113102 -- 2 sets
SERVO MOUNTING PANEL PL5310000 -- 1 pair
SCREW PWA2x8mm -- 8 pcs
3. WING TUBE Ø16x285mm -- 1 pc.
4. STABILIZER & ELEVATOR -- 1 set
FUSELAGE -- 1 pc.
5. VERTICAL FIN & RUDDER -- 1 set
6. TAIL LANDING GEAR Ø2mm -- 1 set
SCREW PA3x12mm -- 2 pcs
COLLAR Ø2.1mm w/ set screw -- 1 set
TAIL WHEEL Ø25mm -- 1 pc.
7. PUSHROD Ø1.8x730mm w/ Threads (For Elevator) -- 2 pcs
SCREW PB2x14mm -- 4 pcs
CLEVIS PL4112103 -- 2 pcs
FUEL TUBE Ø6x5mm -- 2 pcs
HORN PL4113102 -- 2 sets
8. RIGGING COUPLER Ø1.8x27mm w/ Threads (For Rudder) -- 2 pcs
WIRE Ø1x880mm (For Rudder) -- 2 pcs
COPPER TUBE d2.5x3.2x8mm (For Rudder) -- 2 pcs
SCREW PM2x20mm -- 2 pcs
M2 NUT -- 2 pcs
CLEVIS PL4112103 -- 2 pcs
FUEL TUBE Ø6x5mm -- 2 pcs
HORN (Without Base,For Rudder) PL4113102 -- 2 sets
9. MAIN LANDING GEAR HW2403137 -- 1 pair
COLLAR Ø4.1mm w/ set screw -- 4 sets
SOCKET HEAD SCREW M2.5x12mm -- 6 pcs
SCREW PM4x38mm -- 2 pcs
QUICK RELEASE NYLON RIVET PL1208042 -- 4 sets
WASHER d2.5xD8mm -- 6 pcs
WASHER d4.5xD9mm -- 4 pcs
M4 NUT -- 2 pcs
MAIN WHEEL Ø55mm -- 2 pcs
WHEEL PANTS -- 1 pair
ALUMINUM PLATE 1mm -- 1 pair
10. ENGINE MOUNT PL5111050 -- 1 set
SOCKET HEAD SCREW M4x25mm -- 4 pcs
WASHER d4.5xD9mm -- 4 pcs
11. FUEL TANK 320cc PL1111320 -- 1 set
CABLE TIE 1.5x5x400mm -- 1 pc.
DOUBLE-SIDED TAPE 40x100mm -- 1 pc.
12. LINKAGE CONNECTOR Ø2.1mm HW7111060 --1 set
13. SOCKET HEAD SCREW M3.5x30mm -- 4 pcs
M3.5 NUT -- 8 pcs
WASHER d3.5xD8mm -- 8 pcs
THROTTLE PUSHROD Ø1.2x480mm -- 1 pc.
PLASTIC TUBE d2xD3x300mm -- 1 pc.
14. PUSHROD Ø1.8x110mm (For Elevator) -- 1 pc.
RIGGING Z BEND Ø1.8x27mm (For Rudder) -- 2 pcs
COPPER TUBE d2.5x3.2x8mm (For Rudder) -- 2 pcs
FUEL TUBE Ø6x5mm -- 1 pc.
STRAPER PL4112102 -- 1 pc.
PUSHROD CONNECTOR PL4410010 -- 1 set
SPONGE 60x70x90mm (For Radio Equipment) -- 1 pc.
15. SCREW HM4x35mm -- 2 pcs
WASHER d4.2xD14.5mm -- 2 pcs
BELLY PAN -- 1 pc.
16. CANOPY -- 1 pc.
SCREW PWA2.3x8mm -- 4 pcs
SILICON GROMMET d1.5xD6.5mm -- 4 pcs
DOUBLE-SIDED TAPE 900mm -- 1 pc.
17. COWLING -- 1 pc.
TRANSPARENT 3D TEMPLATE -- 1 pc.
SCREW PWA2.6x12mm -- 4 pcs
SILICON GROMMET d1.5xD6.5mm PL1265035 -- 4 pcs
SPINNER Ø62mm -- 1 set
18. DECALS: A249L DEC -- 1 set
COVERING:
TOUGHLON STLA24900R
TOUGHLON STLA24900L
TOUGHLON STL201 BLACK
TOUGHLON STL 490002
STRIPE FER.RED / WHITE (6cm)

A249LPO27471203
P.3
1Main Wing
Apply instant type CA glue to both sides of each hinge.
BottomView
Aileron Servo Lead
Aileron Servo
2
PB2x22mm Screw
4
8
PWA2x8mm Screw
Pushrod Ø1.8x80mm
BottomView
TWM PL8210010
CLEVIS WRENCH
Straper Fuel Tube
6x5mmD
1.5mm
PWA2x8mm
Ø1mm pilot holes for World
Models tri-horn are pre-drilled.
Please look for pin-hole marks
at under side of control surfaces.
PB2x22mm
Fuel Tube
D6x5mm
Clevis
Pushrod
Ø1.8x80mm
Horn

A249LPO27471203
P.4
Stabilizer / Elevator
4
Apply instant type CA glue to both sides of
each hinge.
(Stabilizer)
(Main Wing)
B B'
B=B'
* Also refer to step 18 Wing Setting
A A'
A=A'
Temporary install the
main wing, adjust
leveling of the stabilizer
to make it as parallel
to the main wing as
possible.
Wing Tube Ø16x285mm
Main Wing
3
Make sure to glue securely. If not properly glued, a failure in fight may occur.
Please apply glue to all surfaces of wing tube.
Completed
Completed

A249LPO27471203
P.5
Bottom View
6Tail Landing Gear
Vertical Fin & Rudder
5
sides of each hinge.
C=C'
CC
WHEEL Ø25mm2.1mm Collar
PA3x12mm
3mm set screw
1.5mm
2mm
PA3x12mm Screw
2
1
2.1mm Collar
Completed
Apply instant type CA glue to both

A249LPO27471203
P.6
7Elevator Pushrod
Rudder Pullwire
8
Please look for pin-hole marks at under side of control surfaces.
Main Landing Gear
9
4
PB2 x14mm Screw
Ø1mmpilotholes forWorldModels tri-hornare pre-drilled.
PM2 x 20mm Screw
2
M2 Nut
2
Completed
M2.5x12mm Socket Head Screw
4.1mm Collar
M4 Nut
6
4
2
d4.5xD9mm Washer
KA2.3x8mm Screw
d2xD8mm
QuickReleaseNylonRivet
4
4
4
d2.5xD8mm Washer
6
PM4x38mm Screw
2
KA2.3x8mm
d2xD8mm
Quick Release Nylon Rivet
1mm
Ø1mm pilot holes for World Models Tri-horn are pre-drilled.
Please look for pin-hole marks at under side of control surfaces.
§PP
§PP
Bottom View
Bottom View
TWM PL8210010
CLEVIS WRENCH
TWM PL8210010
CLEVIS WRENCH
§PP
§PP
PB2x14mm
Fuel Tube
Ø6x5mm
Clevis
Pushrod
Ø1.4x730mm
Horn
Copper Tube
Clevis
PM2x20mm
Horn
M2 Nut
Ø
1x880mm
Rudder pushwire
d2.5xD3.2x8mm Rigging Coupler
Ø1.8x27mm
Fuel Tube
Ø6x5mm
Copper Tube
Wire
Press down the
center 1/3 portion
PM4x38mm
Plate 1mm
d4.5xD9mm Washer
Wheel Ø55mm 3mm
Set Screw
4.1mm Collar
M4 Nut

A249LPO27471203
P.7
11 Fuel Tank
EngineMount
10
d4.5xD9mm Washer
4
d4.5xD9mm
Cable Tie 1.5x5x400mm
Double-sided Tape
40x100mm
Washer
Blind nuts are off-centered to keep
the spinner at the fuselage axis.
Engine Mount PL5111050
Servo Set
12
3x3mm Set Screw
M2 Nut
Linkage Connector
1
1
1
2
2mm Washer
Throttle Pushwire
Please refer to the attached sheet for linkage connector installation.
3x 3mm Set Screw
2mm
Washer
2mm
Washer
M2 Nut
Throttle Servo
1.5mm
M4x25mm Socket Head Screw
M4x25mm
4
Inverted Mount
UP
Fuel Tank
320cc
CompletedBottom View
123

A249LPO27471203
P.8
Engine
13
Throttle Pushrod
Ø1.2x480mm
Plastic Tube
d2xD3x300mm
14 Radio Equipment
Installed Engine Position
(Inverted Mount)
115mm
4.5 in.
M3.5 Nut
M3.5x30mm
d3.5xD8mm
Washer
M x mm3.5 30
M Nut3.5
Washer
d3.5xD8mm
Copper Tube Pushrod Connector
Rigging Z Bend
Ø1.8x27mm
CopperTube
Wire
Pressdownthecenter
1/3portion
Elevator Servo
Pushrod
Connector
M3.5x30mm Socket Head Screw
M3.5 Nut
4
8
d3.5xD8mm Washer
8
Install and arrange the servos as
shown in the diagram.
KM2x8mm
M2Nut
Elevator Pushrod
Ø1.8x110mm
J1
J2
J1(Pushrod Ø1.8x110mm)
J2(Pushrod Ø1.8x730mm)
FuelTube
6x5mm
Straper
Pushrod
Throttle Pushwire
Ø1.2x480mm
Sponge
60x70x90mm
Switch
Throttle Servo Plastic Tube
d2xD3x300mm
Receiver Battery
Front
Fuel Tube
Ø6x5mm
Straper
Elevator Pushrod
Ø1.8x730mm Rudder Servo
Elevator Servo Charge Receptacles
KP0041300
Bottom View

A249LPO27471203
P.9
Canopy
16 First insert the grommet into the canopy then apply screw.
17 Cowling
Spinner
Ø62mm
First insert the grommet into the cowling then apply screw.
15
d4.2xD14.5mmWasher
2
2
Main Wing
Please refer to the attached sheet for usage of the transparent 3D template.
HM4 x35mm Screw
Double-sidedTape900mm
HM4x35mm
Washer
d4.2xD14.5mm
Bottom View
PWA2.3 x 8mm
d1.5 x D6.5 mm
Silicon Grommet 1mm
1mm Propeller
PWA2.6x12mm
Silicon Grommet
d1.5xD6.5mm
Cowling
Fuselage
PWA2.6 X 12mm
Screw
4
d1.5xD6.5mm Silicon Grommet
4
PWA2.3 X 8mm
Screw
4
d1.5xD6.5mm Silicon Grommet
4

A249LPO27471203
P.10
WingSetting
18
A = A ' B = B ' C = C '
B B'
C C'
AA'
Adjust the wing and fuselage configuration as shown in the diagrams.

A249LPO27471203
# is specially designed to be powered by engine, using a more
powerful engine does not mean better performance. In fact, over powered engine may
cause severe damage and injuries.
Aeroba t ics

P.11
ControlThrows Adjust the control throws as shown in the diagram.
These throws are good for general flying. You can
adjust according to your personal preference.
C.G.
20 The ideal C.G. position is 117mm (4.6 in.) behind
the leading edge measured at where the wing
meets the fuselage. In order to obtain the C.G.
specified, add weight to the fuselage or move
the battery position. Check the C.G. before
flying.
C.G.
117mm
4.6 in
Important Safety Precautions
Warning!
# First time flyer should never fly by himself / herself. Assistance from experienced flyer is
absolutely necessary.
# Pre-flight adjustment must be done before flying, it is very dangerous to fly a badly
pre-adjusted aircraft.
# Make sure the air field is spacious, never fly the plane too close to people and never get
too close to a running propeller.
# If you find wrinkles on the covering as a result of weather changes, you can use hot iron to
remove the wrinkles. Please begin with lower temperature setting and gradually raisethe
temperature until the wrinkles are gone. Too hot an iron may damage the covering.
Don't use hot iron near the seams or edges, hot iron will melt the glue and shrink the
covering at the same time, causing the seams to pull away.
# Check and re-tighten up all factory assembled screws, use thread locker if necessary.
http://www.theworldmodels.com/para/instruction/instructionManuals.php
Rudder 45mm
45mm
18mm
18mm
10mm
10mm
Elevator
Aileron
4C0.5-0.70

A249LPO27471203
Product Registration Form (US Customers)
We would like to share with you any relevant information regarding your model, including
product news and free upgrade parts when applicable. Please fill in the following and
send toAirBorne Models, 4749-K,Bennett Drive, Livermore, CA94551 USA.
1. Name:______________________________________________
2.Address:____________________________________________
3. Phone #:____________________ E-mail:__________________
4. Model:______________________________________________
Wing QC#__________ Fuselage QC# _______________________
(QC numbers are stamped on wing and fuselage)
5. Date of Purchase:_____________________________________
6. Store Name: _________________________________________
Please callAirBorne Models at 925 371 0922 for any assistance in filling this
form.Thank you very much for purchasing our product.
LINKAGE CONNECTOR
HW7111050 & HW7111060
After fastening the round nut, make sure that
the linkage connector can rotate freely.
Drill 2mm hole at servo horn. Insert linkage connector
into servo horn.
Make sure shoulder of
screw is cleared from
servo horn.
Add washer to reduce
play if necessary.
Shoulder
Tighten up the round nut
against the shoulder. Apply
CA or permanent thread
locker.

A249LPO27471203
This transparent 3D template
is used for position guidance
of the actual cutting of the
pre-painted cowling.
Usage of the transparent 3D template
Simply cut the transparent 3D template to fit your engine and
exhaust pipe, then slide onto the actual cowling and use as
template to mark the openings required for final cutting.
1 2
3 4

A249LPO27471203
Optional Parts
180mm Extension
KW0011800 180mm 1 set
Code No. Size Package
Fuel Filler
PL8110030 15 x 22 x 49mm 1 x 1 pc
Code No. Size Package
Charge Receptacles
KP0041300
Code No. Size Package
Field Stand
MS9111430 600 x 240 x 310mm 1 pc
Code No. Size Package
180mm Y-Cord
KW0021800 180mm 1 pc
Code No. Size Package
Clevis Wrench
PL8210010 1 set
SV4031 1 set
Code No. Size Package
Code No. Size Package
Small Clevis Large Clevis
Specialtoolfor clevis installation.
Suitable forstandard and small
(EP)clevis.
Standard Servo
0.14 sec / 60° @6.0V
Torque : 3.2kg.cm /44.8 oz - in @4.8V
4.1kg.cm /57.4 oz -in @6.0V
Size : 40.6 x 20 x 37mm /
1.60 x 0.79 x 1.46 in
Weight:39.4 g /1.39 oz
Speed :0.17 sec /60° @4.8V

A249LPO27471203
The World Models
Manufacturing Co., Ltd.
www.theworldmodels.com