The World Models Manufacturing ALMOST-READY-TO-FLY (ARF) SERIESGroovy 90 3A User manual

Wing Span
Wing Area
Flying Weight
Fuselage Length
65.5in / 1670mm
837sq in / 54sq dm
8.4 lbs / 3800g
67 in / 1700mm
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.
0.91 cu.in. displacement 4-cycle
Radio required : 4- channels, 5 servos airplane radio
* Specifications are subject to change without notice.*
Specifications
INSTRUCTION MANUAL
E
A
D
R
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T -
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F
M
L
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Y
A
9
A180R1103
FACTORY PRE-FABRICATED
ALMOST-READY-TO-FLY (ARF) SERIES
MADE IN CHINA

9
P.1
P. 3 -11
Do not overlook this symbol!
Cut off shaded portion.
Peel off shaded portion
covering film.
Pay close attention here!
Pierce the shaded portion
covering film.
Must be purchased separately!
Drill holes with the specified
diameter (here: 3mm).
3mm
INDEX
BEFORE YOU BEGIN
PARTS LIST
ASSEMBLY
SAFETY PRECAUTIONS
P. 1
P. 2
P.11
BEFORE YOU BEGIN
Read through the manual before you begin, so you will have an overall idea of what to do.
Symbols used throughout this instruction manual comprise of the following : -
Ensure smooth non-binding
movement while assembling.
Apply instant glue
(C.A.glue, super glue.)
Assemble left and right
sides the same way.
Apply epoxy glue.
1
2
3
A180R1103
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 CA or 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.

Parts List
COVERING:--
TOUGHLON STL 100 WHITE
TOUGHLON STL 561 PEARL PURPLE
TOUGHLON STL 550 PEARL BLUE
TOUGHLON STL 361 PURPLE
TOUGHLON STL 511 PEARL FERRARI RED
TOUGHLON STL 360 VIOLET
TOUGHLON STL 251 SKY BLUE
P.2
1. MAIN WING -- 1 pair
2. SCREW PM2x25mm -- 6 pcs
FUEL TUBE Ø6x5mm -- 4 pcs
STRAPER -- 2 pcs
CLEVIS -- 2 pcs
TRI-HORN M3x14mm (L) -- 2 sets
PUSHROD Ø1.8x115mm w/Threads(For Aileron) -- 2 pcs
3. STABILIZER & ELEVATOR -- 1 set
FUSELAGE -- 1 pc.
SCREW PA3x12mm -- 2 pcs
WASHER d3xD7mm -- 2 pcs
STABILIZER TUBE Ø9.5x254mm -- 1 pc.
WIRE Ø3x114mm -- 1 pc.
4. VERTICAL FIN & RUDDER -- 1 set
5. TAIL LANDING GEAR -- 1 set
SCREW PA3x12mm -- 2 pcs
COLLAR Ø2.6mm w/ set screw -- 1 set
TAIL WHEEL Ø30mm -- 1 pc.
6. CARBON FIBER MAIN LANDING GEAR -- 1 set
WHEEL PANTS -- 1 pair
SCREW PM3x15mm -- 6 pcs
SCREW PM4x40mm -- 2 pcs
NYLON BOLT M3x18mm -- 2 pcs
COLLAR Ø4.1mm w/ set screw -- 4 sets
WHEEL Ø55mm -- 2 pcs
WASHER d4xD9mm -- 2 pcs
WASHER d3xD12mm -- 6 pcs
M4 NUT -- 2 pcs
M3 NUT -- 2 pcs
7. SCREW PM2x30mm -- 3 pcs
M2 NUT -- 3 pcs
FUEL TUBE Ø6x5mm -- 2 pcs
CLEVIS -- 2 pcs
TRI-HORN M3x14mm (L)(w/ o-Base For Rudder)-- 2 sets
RIGGING COUPLER Ø1.8x27mm w/ Threads(For Rudder) -- 2 pcs
COPPER TUBE d2.5xD3.2x8mm (For Rudder) -- 2 pcs
WIRE Ø1x1170mm (For Rudder) -- 2 pcs
8. SCREW PM2x22mm -- 6 pcs
CLEVIS -- 2 pcs
FUEL TUBE Ø6x5mm -- 2 pcs
TRI-HORN M3x14mm (L) -- 2 sets
PUSHROD Ø1.8x900mm w/ Threads (For Elevator) -- 2 pcs
9. ENGINE MOUNT PL5911080 -- 1 set
SCREW PM4x25mm -- 4 pcs
WASHER d4xD12mm -- 4 pcs
10. FUEL TANK 380cc -- 1 set
BALSA 10x10x115mm (For Fixing Fuel Tank) -- 1 pc.
RUBBER BAND 6x60mm(L) -- 2 pcs
11. THROTTLE PUSHWIRE Ø1.2x275mm -- 1 pc.
W/ Plastic tube d2xD3x130mm -- 1 pc.
ALUMINUM PLATE (For Engine Mount) -- 1 pc.
ANTI-VIBRATION MOUNT 4C-91 -- 1 set
INCLUDE: SOCKET HEAD SCREW M4x35mm -- 4 pcs
SCREW KM3x20mm -- 8 pcs
WASHER d4xD12mm -- 8 pcs
M3 NYLON INSERT LOCK NUT -- 8 pcs
M4 NYLON INSERT LOCK NUT -- 4 pcs
12. LINKAGE CONNECTOR Ø2.1mm -- 1 set
13. SPONGE 67x70x115mm (For Radio Equipment) -- 1 pc.
Y CONNECTOR PL4410010 -- 1 set
STRAPER -- 1 pc.
FUEL TUBE Ø6x5mm -- 1 pc.
RIGGING Z BEND Ø1.8x27mm (For Rudder) -- 2 pcs
COPPER TUBE d2.5xD3.2x8mm (For Rudder) -- 2 pcs
PUSHROD Ø1.8x105mm (For Elevator) -- 1 pc.
WING INCIDENCE ANGLE ADJUSTER -- 4 sets
14. SCREW PM3x25mm -- 1 pc.
SCREW PA3x25mm -- 1 pc.
WASHER d3xD7mm -- 2 pcs
WING TUBE Ø22x727mm -- 1 pc.
15. CANOPY -- 1 set
PILOT PC001063A -- 1 pc.
DOUBLE-SIDED TAPE -- 1 pc.
SCREW PWA2.3x8mm -- 4 pcs
SCREW PM3x16mm -- 2 pcs
SILICON GROMMET d1.5xD6.5mm -- 4 pcs
WASHER d3xD7mm -- 2 pcs
16. COWLING -- 1 set
TRANSPARENT DUMMY COWLING -- 1 pc.
SCREW PWA2.3x8mm -- 6 pcs
SCREW PWA2.6x12mm -- 4 pcs
SILICON GROMMET d1.5xD6.5mm -- 10 pcs
SPINNER (w.alu.back plate) Ø70mm -- 1 set
17. DECALS --1 set
A180R1103

Aileron Servo Lead
Bottom View
Main Wing
1
Aileron Servo
2
PM2x25mm Screw
6
Ø1.8x115mm
Pushrod
2mm
Fuel Tube
Ø6x5mm
straper
1 m m
PM2x25mm
Clevis
Tri-horn
M3x14mm
Ø1mm pilot holes for World Models tri-horn are pre-drilled.
Please look for pin-hole marks at under side of control surfaces.
Apply instant type CA
glue to both sides of
each hinge.
Stabilizer / Elevator
3
AA'
A=A'
Stabilizer Tube
Bottom View
PA3 x 12mm
47mm
102mm
PA3 x 12mm
M3 x 6mm Set Screw
M3 x 6mm Set Screw
M3 x 6mm Set Screw
M3 x 6mm Set Screw
Bottom View
Apply instant type CA glue to both sides of each hinge.
Bottom View
Bottom View
Ø3x114mm
2mm
2mm
d3xD7mm
Washer
d3xD7mm
Washer
PA3 x 12mm Screw
d3 x D7mm Washer
2
2
P.3
A180R1103

Vertical Fin & Rudder
4
A = A'
A A'
Apply instant type CA glue to both
sides of each hinge.
5Tail Landing Gear
2.6mm Collar
1
PA3 x 12mm Screw
2
M3 x 3mm Set Screw
PA3 x 12mm
2.6mm Collar
2.5mm
Bottom View
1.5mm
Main Landing Gear
6
PM3x15mm Screw
4.1mm Collar
PM4x40mm Screw
2
2
d3xD12mm Washer
6
4
d4xD9mm Washer
M4 Nut
2
d3x D12mm Washer
Bottom View
PM3x15mm
Front
4.1mm
Collar
Nylon Bolt
M3x18mm
d4xD9mm
Washer
M4 Nut
M3
Nut
PM4x40mm
M3x3mm
Set Screw
Wheel Ø55mm
Completed
M3x18mm NYLON BOLT
2
M3 Nut
2
6
P.4
A180R1103

P.5
Rudder Pullwire
7
Rigging Coupler
1.8x27mm
Fuel Tube
Ø6x5mm
Clevis
Copper Tube
2mm
PM2x30mm Screw
3
M2 Nut
3
PM2x30mm
M2 Nut
210mm
88mm
210mm
88mm
Tri-horn
M3x14mm
9Engine Mount
!
Blind nuts are off-centered to keep
the spinner at the fuselage axis.
4
d4 x D12mm Washer
Engine Mount
PL 5911080
Apply thread locker to screws.
PM 4x 25mm Screw
4
d4 x D12mm
Washer
PM 4x 25mm
8Elevator Pushrod
PM 2 x 22 mm Screw
6
Ø1mm pilot holes for World Models tri-horn are pre-drilled.
Please look for pin-hole marks at under side of control surfaces.
225mm
53mm
Ø1mm pilot for holes for World
Models tri-horn are pre-drilled.
Please look for pin-hole marks
at side of control surfaces.
Elevator Pushrod
1.8x 900mm
Fuel Tube
Ø6x5mm
PM 2 x 22mm
Tri-horn
M3 x 14mm(L)
Clevis
2mm
A180R1103

P.6
Fuel Tank
10
Engine
11
Install Engine position
5.39in.
137mm
M4 Nylon Insert Lock Nut
4
8
4
8
d4 x D12mm Washer
KM3x20mm Screw
M3 Nylon Insert Lock Nut
8
d2xD3x130mm
Plastic tube
Throttle Pushwire
1.2x275mm
P.6
Fuel Tank
10
Engine
M4x35mm SOCKET HEAD SCREW
d4 x D12mm Washer
ANTI-VIBRATION MOUNT INSTALLATION
KM3x20mm
Make sure the rounded edges
are facing the shock absorbing
SILICON PAD.
M3 Nylon Insert Lock Nut
M4 Nylon Insert Lock Nut
Rubber Band
Install Balsa 10 x 10 x 115mm
(For fixing fuel tank)
Fuel Tank
380cc
Fuel Tank
380cc
Rubber Band
(For fixing fuel tank)
M4x35mm SOCKET HEAD SCREW
d4 x D12mm Washer
Install Balsa 10 x 10 x 115mm
A180R1103

P.7
Throttle Pushrod
3mm
Included with the radio Set.
Throttle Servo.
2mm
Servo Set
2mm
3 x 3mm Set Screw
Linkage Connector
M2 Nut
2mm Washer
1
1
1
2
LINKAGE CONNECTOR
12
2mm
Please refer to attached sheet for linkage connector installation.
2mm
PWA2.6x12mm
Inside
Outside
Wing Incidence Angle Adjuster
M3 Nylon Insert Lock Nut
M3 x30mm
Install and arrange the servo as shown in the diagram.
Throttle Servo Throttle Pushrod Ø1.2x275mm
Rudder Servo
Press down the center
1/3 portion
Sponge
Elevator Servo
Front
Radio Equipment
13
Ø1x1170mm
Straper
Fuel Tube
Ø6x5mm
Ø1.8x900mm
Elevator Servo
RIGGING Z BEND
Ø1.8x27mm
KM 2x8mm
M2 nut
Elevator Pushrod
Ø1.8x105mm
Elevator Pushrod
Rudder Pullwire
Copper Tube
Straper
A180R1103

P.8
Main Wing
14
d3 x D7mm Washer
PM3x25mm Screw
1
2
PA3x25mm Screw
1
PA3x25mm
d3 x D7mm
Washer
Step 1. Insert the aluminum wing tube with the pre-drilled hole end into the right wing. Align
the lines marked at the wing root and wing tube, then apply the PM3 x 25mm machine screw
through the pre-drilled hole on top of the wing. ( please confirm the alignment of the hole by
putting a 2.5mm diameter rod through the pre-drilled wing hole before applying the screw )
The hole on the wing tube is pre-threaded, do not over tighten the PM3 screw, the set up is for
future removal of the wing.
Step 2. Install the right wing to the fuselage by inserting the wing tube (now attached to the right
wing) through the fuselage, then install the left wing.
Step 3. Make sure the wings are resting against the fuselage tightly. Locate the pre-drilled 2.5mm hole at
top of left wing, and drill along with 2.5mm drill bit until it passes through the w i n g t u b e . Ap p l y t h e PA3
x25mm self-tapping screw.
Note : It is recommended that the wing tube stays with the left wing. Removal of the wings could be achieved by
removing the right wing machine screw, the right wing then the left wing with wing tube. If removal of wing tube
from left wing is also required, it is recommended that instead of applying self-tapping screw in step 3, you pre-tap
with M3 thread cutter and apply M3 machine screw.
Wing Tube
D22x727mm
PM3x25mm
d3 x D7mm Washer
≈301mmm
2.5mm
Top View
Left Right
Lead to Aileron Servo
A180R1103

P.9
Canopy & Pilot
15
PWA2.3x8mm Screw
4
4
d1.5 x D6.5 mm
Silicon Grommet
16 Cowling
PWA2.3 x 8mm
PWA2.6x12mm
d1.5xD6.5 mm
Silicon Grommet
PWA2.3x8mm Screw
6
10
d1.5 x D6.5 mm
Silicon Grommet
PWA2.6x12mm Screw
4
PM3x16mm Screw
2
PM3x16mm
1mm
First insert the grommet to the canopy then apply screw.
d1.5xD6.5 mm
Silicon Grommet
1mm
Apply double-sided tape
d3xD7mm
Washer
d3 x D7 mm Washer
2
Spinner
PWA2.3 x 8mm
d1.5 x D6.5 mm
Silicon Grommet
A180R1103

P.10
AA'
Wing Setting
17
Adjust the wing and fuselage configuration as shown in the diagrams.
B B'
C'
C
ENGINE
DOWN THRUST
ANGLE 1°
MAIN WING
INCIDENCE
ANGLE 0°
A180 GROOVY 90-3A
STABILIZER
INCIDENCE
ANGLE 0°
A=A’ B=B’ C=C’
Stabilizer Setting
TO INCREASE INCIDENCE ANGLE, LOOSE BOTTOM SET SCREW AND THEN TIGHTEN
TOP SET SCREW. TO REDUCE INCIDENCE ANGLE, LOOSE TOP SET SCREW AND
THEN TIGHTEN BOTTOM SET SCREW. DON'T OVER TIGHTEN SET SCREWS AS THE
INCIDENCE ANGLE ADJUSTER ARE MADE OF PLASTICS.
TOP
BOTTOM
M3X6mm Set Screw
A180R1103

P.11
19
160 mm
6.3 in.
Important Safety Precautions
# 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.
# GROOVY-90 is specially designed to be powered by 4c 0.91 engine, using a more
powerful engine does not mean better performance. In fact, over powered engine may cause
severe damage and injuries.
# 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 raise
the temperature until the wrinkles are gone. Too hot an iron may damage the covering.
# Check and re-tighten up all factory assembled screws, use thread locker if applicable.
A180R1103
9
Adjust the control throws as shown in the diagram.
These throws are good for general flying. You can
adjust according to your personal preference.
20mm
20mm
60mm
60mm
25mm
25mm
Elevator
Rudder
Ailerons
http://www.theworldmodels.com/para/instruction/instructionManuals.php
The ideal C.G. position is 160mm (6.3 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.
If you are converting this model to electric, please move the C.G. forward 10% of current C.G.
distance from leading edge to compensate for weight of fuel.

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
A180R1103

The World Models
Manufacturing Co., Ltd.
www.theworldmodels.com
A180R1103