Nexa Dago red Unlimited Air Racer 4 User manual

SPECIFICATIONS
Wingspan.......57.5 in. / 146cm
Length...............50 in. / 127cm
Engine................46 2T / .70 4T
or Electric equivalent.
Radio.................. 6-8 channels

1.5mm
AB
!
CA
L/R
Assemble left and right
sides the same way.
X
Drill holes using the stated
size of drill
(in this case 1.5 mm Ø)
Use epoxy glue
Take particular care here Hatched-in areas:
remove covering
film carefully
Not included.
These parts must be
purchased separately
Check during assembly that these
parts move freely, without binding
Apply cyano glue
The pre-covered film on ARF kit may wrinkle due to variations
of temperature. Smooth out as explained right.
* Use an iron or heat gun. Start as low setting. Increase the
setting if necsessary. If it is too high, you may damage the
film Low setting
SILICON
EPOXY A
EPOXY B
CA
GLUE
Epoxy Glue ( 5 minute type)
Silicon sealer
Cyanoacrylate
Glue
Epoxy Glue (30 minute type)
TOLLS REQUIRED
Hobby knife
Needle nose Pliers
Phillip screw driver
Awl
Scissors
Wire Cutters
(Purchase separately)
Hex Wrench
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Sander
Masking tape - Straight Edged Ruler - Pen or pencil - Rubbing alcohol - Drill and Assorted Drill Bits
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:
(Purchase separately)
CONVERSION TABLE
1.0mm = 3/64”
1.5mm = 1/16”
2.0mm = 5/64”
2.5mm = 3/32”
3.0mm = 1/8”
4.0mm = 5/32”
5.0mm = 13/64”
6.0mm = 15/64”
10mm = 13/32”
12mm = 15/32”
15mm = 19/32”
20mm = 51/64”
25mm = 1”
30mm = 1-3/16”
45mm = 1-51/64”
Minimum 7 channel radio
for airplane with 7 servos .60 ~.70 - 4 cycle
10.5x6 for .40 - 2 cycle engine
11x6 for .46 - 2 cycle engine
12x6 for .60 - 4 cycle engine
12x7 for .70 - 4 cycle engine
13x8 for G-46 HP Motor.
Silicone tube
Extension for aileron
servo, retract servo.
.46 ~ .50 - 2 cycle
REQUIRED FOR OPERATION (Purchase separately)
.Motor control x1
.Elevator x1
.Rudder x1
.Aileron x2 mini servo
.Flap x2 mini servo
600-700Watt
Brushless motor
Motor Control
Li-Po Battery, 5 cell 4500mAh.

1-Depending on the position of the linkage, determine the location of aileron control horn.
The horn holes must be perfectly aligned with the axis of articulation.
2-Mark the position of the “foot” of the horn on the aileron. Then, with the drill, make the 2 holes.
3-Install the aileron control horn as shown.
Control horn Alignment
Do the same way with second wing half.
..........2
2x30mm....4
....................2
X
CA
Thin CA
2x30mm
The rectangular hole on the bottom
of the flap is pre-cut at factory
P-51 Voodoo 1- Servo & Control horn

-Switch on the radio (trims centered)
Then mount the ailerons servo horn
In neutral position.
-The servo horn should be
Perpendicular to the servo
YES NO
Draw the center line
on the wing joiner
- Trial fit each part before gluing . Be certain that there are no gaps.
If the parts will join, but with a gaps, sand or trim the parts a little at
a time until the parts meet exactly with no gaps.
- Check for the correct dihedral angle
Before gluing:
- Draw the center line on the wing joiner.
Coat one half of the dihedral brace with
epoxy up to the center line.
AB
AB
30 min. Epoxy
Install the epoxy-coated side of
the dihedral brace into the wing
joiner cavity up to the center line.
Step 3:1
Step 3:2
Step 3:3
30 min. Epoxy
P-51 Voodoo 2- Aileron and flap linkages
3- Joining the wing

Main landing gear
Gear mount
3x20mm
Nylon gear
strap
2mm
2mm
2mm
3x20mm
Ply gear mount
plate x 2
Gear mount x 2
3x20mm screw
......16
Nylon gear strap
.......4
Square plastic x 2
Insert the main landing gear into
the slot on the gear mount, if
necessary, use sander to widen
the slot to make this easier.
Ply gear
mount flat
Square
plastic
CA
5- Fixed gear
Step 4:1 Step 4:2 Step 4:3
Step 4:4 Step 4:5
Carefully slide the wing halves together, ensuring that they
are accurately aligned.
Firmly press the two halves together, allowing the excess
epoxy to run out.
Note: The two wing halves roots must fit together perfectly.
Clear off the excess epoxy.
IMPORTANT:
Please do not clean off the excess epoxy on the
wing with strong solvent or pure alcohol, only use kerosene to
keep the colour of your model not fade.
Hold the wing halves together with paper
clamp and rubber band.
Rubber band
(not include)
Paper clamp
(not include)
Nylon wing bolt
(included)
Cut away only
the covering
Cut away only
the covering
P-51 Voodoo 4- Joining the wing Continued

2mm
2mm
3x12mm screw
.....2
...........2
P-51 Voodoo 6- Fixed gear installation
.........8
3x12mm screw

1.5mm
CA
CA
CA
CA
.........4
2mm screw
P-51 Voodoo 7- Main wheel
Note: you can use 2x8mm self tapping screws to fix the
plastic cover if possible late you can use retract landing gear

Using a sharp hobby knife, cut away the covering
inside the line, not to cut into the wood.
6x40mm nylon bolt
.........2
Using the plastic air scoop and wing shield as a template, with the pencil, trace around
the outside edge of the air scoop and wing shield. then remove it
P-51 Voodoo 8- Air scoop

CA
CA
Thin CA Thin CA
Wing bolt mount
Plastic air scoop
Plastic cover
6x40 plastic bolt
(Ply wood)
Plastic mount nut
Bottom
WING
Plastic air scoop
Plastic cover
6x40 plastic bolt
WING
Rubber “O” ring
or rubber band
X
Note: This rubber “O” ring keeps the plastic bolt
from coming out of the wing.
P-51 Voodoo 9- Air scoop Continued

Use a small glue faucet, Apply the thin CA glue on
the horizontal stabilizer where it contacts the fuselage
(both the top and bottom sides),and into the slot of the
fuselage as show.
Step 10:1
When you are satisfied with the alignment,
use a pencil to trace around the top and bottom
of the horizontal stabilizer where the horizontal stabilizer
meet the fuselage.
Trial fit the horizontal stabilizer in place .
Be cautious not to cut into the wood,
this will weaken the structure.
Cut away only the covering both
the right and left side
A = A’
B = B’
AA’
90O90O
BB’
Cut away only the
covering both the
top and bottom sides.
CA Thin CA glue
When you insert the horizontal stabilizer into
the slot on the fuselage, if necessary, use
sander to widen the slot to make this easier.
Remove the horizontal stabilizer from the fuselage.
Using the sharp hobby knife, carefully cut away the
covering inside the lines which were marked above.
Securely glue together. If coming off during flight,
you lose control of your air plane.
P-51 Voodoo 10- Horizontal stabilizer
Step 10:2
Step 10:3
Step 10:4

Remove the vertical stabilizer from the fuselage.
Using the sharp hobby knife, carefully cut away the
covering inside the lines which were marked above.
Be cautious not to cut into the wood, this will
weaken the structure.
When you are satisfied with the alignment,
use a pencil to trace around the right and left
of the stabilizer where the vertical stabilizer
meet the fuselage.
Trial fit the vertical stabilizer in place .
C = C’
CC’
Cut away only the covering
on both sides.
CA
Use a small glue faucet, Apply the thin CA glue on
the vertical stabilizer where it contacts the fuselage
(both the left and right sides).
Securely glue together. If coming off during flight,
you lose control of your air plane.
Perpendicular
P-51 Voodoo 11- Vertical stabilizer
Step 11:1
Step 11:2
Step 11:3
Step 11:4

CA
1- Insert the tail wheel pushrod (1.2x800mm with “Z” bend one end) into the
hole on the tail gear control as shown.
2- Install the tail wheel control horn in place.
4- Secure the tail wheel control horn in place using a 2mm screw set,
Ensure smooth non-binding movement.
5- Installing the tail wheel hatch (H) in place using a four 2x10mm self tapping screws.
6- Attach the tail wheel doors (D) in place using CA glue.
1
3
4
5
2
2mm I.D collar
2x10mm
screw
...............1
Tail landing gear
..........1
............1
2x3mm screw
............4
2x10mm screw
.................1
Tail wheel control-
horn
2mm I.D collar
6
3- Instal the tail wheel gear in place.
BOTTOM-VIEW
H
D
Securely glue together. If coming
off during flight, you lose control
of your air plane.
5 5
Bottom view
3/8 in. (9.5mm)
push the elevator and its hinges into the hinge slots in
the trailing edge of the horizontal stabilizer. There
should be a minimal hinge gap.
When satisfied with the and alignment, hinge the elevator
to the horizontal stabilizer using thin CA glue. Make
sure to apply a thin CA glue to the top and bottom of both
hinges and to inside the hinge slots. Repeat the previous
procedures to hinge the second elevator to the other side
of the horizontal stabilizer.
Do the same way with rudder.
Control horn
................3
2x12mm screw
..........
CA
Hinge
STABILIZER
Thin CA glue
ELEVATOR
P-51 Voodoo 12- Elevator & rudder
13- Tail wheel

A
B
B’
B=B’
FRONT-VIEW
Remove the engine mount and drill a 5mm hole through
the fire-wall at each of the four marks marked.
Using a pencil or felt tipped pen, mark the fire wall where the four
holes are to be drilled
Reposition the engine mounts on to the fire-wall.
Attach the four blind-nut to the fire-wall as show.
Secure them with four 4x25mm hex bolts.
Position the engine on to the engine mounts so the distance
from the prop hub to the fire wall is 127mm
Mark the engine mounting plate where the four holes are to be
drilled.
Note: Mark the mounting plate through the engine mounting flanges.
Reposition the engine on the engine mount beams, aligning it with
the holes. Secure the engine to the engine mount using four
3x25mm hex bolts.
Note: Apply Silicon sealer to
each of the 3x20mm hex bolt.
4mm blind-nut
5mm
3mm
...4
.................4
Blind-nut 3mm nut
.................4
...4
4x25mm hex bolt 3x20mm hex bolt
Attach the engine mount beams onto the fire-wall so the distance between
of two engine mount beams is “A”,and B=B’ as show.
Secure the engine mount beams onto the fire-wall with litter CA glue.
! Align the mark on both engine mount
beams with the mark on the firewall.
Remove the engine and drill a 3mm holes through the beam
at each of the four marks made above.
125~127mm
! Engine thrust on balk
head is already adjust
at factory
1.5
TOP-VIEW
P-51 Voodoo 14- Engine mount & Engine
Step 14:1
Step 14:2
Step 14:3
Step 14:5

Using a aluminum motor mounting plate
as a template, mark the plywood motor
mounting plate where the four holes are
to be drilled.
Remove the aluminum motor mounting
plate and drill a 3mm hole through
the plywood at each of the four marks
marked .
3mm
Step 16:1
Using a wooden motor mounting plate
as a template, mark the fire-wall where
the four holes are to be drilled.
! Align the mark on wooden motor
mounting plate with the mark on
the fire-wall.
F1
Fuselage - Front-view
Step 16:2
Step 16:3
X
To muffler
Filler tube
To engine
Rubber stopper
Checking for leaks - block the vents and blow into the feed.
if in doubt submersing the tank in a blow of water will show
up any problems.
Blow
Water
Carefully install the fuel tank to ensure that they will not
shift during flight (secure the fuel tank in place using foam padding).
P-51 Voodoo 15- Fuel tank
16- Electric motor

B=B’
B
121~ 123mm
SIDE-VIEW
B’
Remove the wooden motor mounting
plate and drill a 5mm hole through
the fire-wall at each of the four marks
marked .
5x70mm bolt.....4
5mm nut..........12
5mm washer...16
5mm
3mm hex bolt / nut...4
Secure the Motor to the wooden
motor mounting plate using the
four 3mm hex bolts.
Attach the four 5x70mm bolts
and nuts to the fire-wall as shown.
P-51
Li-po battery tray
Rudder servo
Elevaror servo
Fuselage Bottom-view
P-51 Voodoo 17- Electric motor Continued
18- Servo & Battery tray
Step 17:1
Step 17:2
Step 17:3

Insert the Li-po battery tray into the fuselage as shown in the figure.
Secure it in place with CA glue or Epoxy glue.
..
X
Li-po battery
P-51
Rudder push-rod
Tail wheel push-rod
Elevator push-rod
Elevator push-rod
2x950mm pushrod and clevis
.....3
2x100mm pushrod
.............2
3 holes connector
.....................2
1.2x800mm pushrod
.............1
P-51 Voodoo 19- Elevator & Rudder linkages

Remove the engine and insert the cowl on to the fuselage
so the distance from the fire wall to the front of the cowl is
125mm. Trace around inside the hole on the board
or transparent plastic with a pencil.
2.5x10mm self tapping screw
.................4
1~2mm
1/16”
Board or
transparent
plastic
Adhesive
tape
Cut the opening
Cut the opening
1.5mm
1.5mm
125mm
Ruler
125mm
P-51 Voodoo 20- Cowling
Attach the board or transparent plastic on the side of
the fuselage with the adhesive tape as show.
Using a pencil or felt tipped pen trace around the engine
head where it meet the cowl. Cut the opening the board
or transparent plastic for the engine head as marked before.
Step 20:1
Remove the cowl from the fuselage and carefully
cut the opening for the engine head as marked above.
Do the same way with the hole for needle-valve.
Step 20:2
Again. Insert the cowl on to the fuselage and secure it in
place with four 2.5x10mm self tapping screws.
Step 20:3
Step 20:4

Note: Cut out the stickers and apply them in the proper area. Do not peel the backing paper off all at once.
Peel off one corner of the backing and cut off with scissors.
Arrange sticker on model and when satisfied adhere the corner without backing.
Carefully peel back the rest of the backing while at the same time adhering the rest of the sticker.
Try not to make air bubbles, if there are some, carefully puncture sticker (center of bubble) but not model
surface with the tip of the knife or sharp pin and squeeze out the air.
At curves stretch sticker and apply a little heat so that no ceases occur.
Cut off the excess that is produced.
All details are subject to change
without notice !
Technische Anderungen und Irrtumer
vorbehalten !
IMPORTANT: Please do not clean your model with pure alcohol, only use liquid soap with water or use glass cleaner
to clean on surface of your model to keep the colour not fade.
P-51 Voodoo 21- Sticker

THE CENTER OF GRAVITY IS LOCATED 132mm BACK
FROM THE LEADING EDGE OF THE WING, AT THE
FUSELAGE. BALANCE A PLANE UPSIDE DOWN WITH
THE FUEL TANK EMPTY.
DO NOT try to fly an out-of-balance model !
1- Mount the wing to the fuselage. Using a couple of pieces of masking tape, place them on the top side of the wing (132mm) back
from the leading edge, at the fuselage sides.
2- Lift the airplane. Place your fingers on the masking tape and carefully lift the plane.
3- If the nose of the plane falls, the plane is heavy nose. To correct this, move the battery pack further back in the fuselage.
If the tail of plane falls, the plane is tail heavy. To correct this, move the battery forward or if this is not possible, stick weight onto
the firewall.
When balanced correctly, the airplane should level or slightly nose down when you lift it up with your fingers.
LATERAL BALANCE:
After you have balanced a plane on the CG, you should laterally balance it. Doing this will help the airplane track straighter.
1- Turn the airplane upside down. Attach one loop of heavy string to the engine crankshaft and one to the tail wheel wire.
With the wing level, carefully lift the airplane by the string. This may require two people to make easier.
2- If one side of the wing fall, that side is heavier than the opposite. Add small amounts of lead weight to the bottom side
of the lighter wing half’s wing tip. Follow this procedure until the wing stays level when you lift the airplane.
132mm
P-51 Voodoo 22- Balance

Adjust the travel of the control surfaces to achieve the values stated in the diagrams.
These value will be suitable for average flight requirements. Adjust the values to suit your particular needs.
RUDDER ELEVATOR
Take off 10mm
Landing 22mm
AILERON
FLAP
32mm
32mm
9mm
9mm
6mm
6mm
Note: Measure rudder’s biggest place
P-51 Voodoo 23- Control surface