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45 Class
2-cycle engine
70 Class
4-cycle engine
Or Electric equivalent
C
CC P
YAK
INSTRUCTION MANUAL / Montageanleitung
All balsa, plywood construction and almost ready to fly
VQA054 - VQA055
TECHNISCHE DATEN
Spannweiter 1520mm
Lange 1237mm
Elektroantrieb BOOST 50
Verbrennerantrieb 7.5cc 2-T / 11cc 4-T
Fernsteuerung 5 Kanal / 5 Servos
SPECIFICATIONS
Wingspan 59.8 in.
Length 48.7 in.
Electric Motor BOOST 50
Glow Engine .46 2-T / .70 4-T
Radio 5 Channel / 5 Servos
WARNING! This radio controlled model is NOT a toy. If modified or flown carelessly it could go out of controll and cause serious human injury or property damage. Before flying your airplane, ensure the air field is spacious enough.
Always fly it outdoors in safe areas and seek professional advice if you are unexperienced.
ACHTUNG! Dieses ferngesteuerte Modell ist KEIN Spielzeug! Es ist für fortgeschrittene Modellflugpiloten bestimmt, die ausreichende Erfahrung im Umgang mit derartigen Modellen besitzen Bei unsachgemäßer Verwendung kann hoher Personen- und/oder Sachschaden entstehen. Fragen Sie in einem Modellbauverein in Ihrer Nähe um professionelle Unterstützung, wenn Sie Hilfe im Bau und Betrieb benötigen. Der Zusammenbau dieses Modells ist durch die vielen Abbildungen selbsterklärend und ist für fortgeschrittene, erfahrene Modellbauer bestimmt.
REQUIRED FOR OPERATION (Purchase separately)
BENOTIGTE KOMPONENTEN FUR DEN ABFLUG (Nicht enthalten)
Retract servo x1
Extension for aileron servo, retract servo.
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
12x6 - BOOST 50
ESC 70A
.46 ~ .50 - 2 cycle
Minimum 5 channel radio for airplane with 5 servos
.Motor control x1 .Aileron x2
.Elevator x1 .Rudder x1
Silicone tube
GLUE (Purchase separately)
.60 ~.70 - 4 cycle
Li-Po Battery, 14.8V, 4500mAH
BOOST 50 or equivalent.
EPOXY A
SILICON
Silicon sealer
CA
Cyanoacrylate Glue
EPOXY B
Retract landing gear
Linkage Stopper x2
(for retract servo)
Epoxy Glue ( 5 minute type)
Epoxy Glue (30 minute type)
TOLLS REQUIRED
(Purchase separately)
Hobby knife
Phillip screw driver
Needle nose Pliers
Scissors
Hex Wrench
Awl
Sander
Wire Cutters
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Masking tape - Straight Edged Ruler - Pen or pencil - Rubbing alcohol - Drill and Assorted Drill Bits
If exposed to direct sunlight and/or heat, wrinkels can appear. Storing the model in a cool place will let the wrinkles disappear. Otherwise, remove wrinkles in covering film with a hair dryer, starting with low temperature. You can fix the corners by using a hot iron.
Bei Sonneneinstrahlung und/oder Wärme kann die Folie erschlaffen bzw. Falten entstehen. Verwenden Sie ein Warumluftgebläse (Haartrockner) um evtl. Falten aus der Folie zu bekommen. Die Kanten können Sie mit einem Bügeleisen behandeln. Nicht zuviel Hitze anwenden !
Low setting
Symbols used throughout this instruction manual, comprise:
1.5mm
Drill holes using the stated size of drill
(in this case 1.5 mm Ø)
!
Take particular care here
A B
Use epoxy glue
CA
Apply cyano glue
Hatched-in areas: remove covering
film carefully
L/R
Assemble left and right sides the same way.
X
Check during assembly that these parts move freely, without binding
Not included.
These parts must be purchased separately
Read through the manual before you begin, so you will have an overall idea of what to do.
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”
1- Retract landing gear / Fahwerk
Trial fit the push rod into the wing. Join the pushrod to the retract gear arm and trial fit the retract into the wing.
After checking that the retract works smoothly, fix the retract on the wing with 3x12mm screws
Bottom view
Ansicht von unten
3x12mm screw
3x12mm schraube
X
L/R
Retract pushrod
Fahrwerkanlenkgestange
Steel clevis
.........2
3x12mm screw
................8
2mm
2- Aileron servo / Querruder servo
Bottom view / Ansicht von unten
40mm
Plastic control horn
Aileron extension cord
Servoverlangerungskabel
X
Aileron servo
Querruder servo
X
....................2
2x20mm screw
...............4
X
Included with the radio set
2mm
15mm
3- Joining the wing / Flache
Use epoxy glue to bury the opening
Nehmen Sie Epoxykleber, um die
Tragflachen fest miteinander zu Verbinden und streifen Sie den herausquellenden
Kleber nach dem Verbinden mit einem fusselfreien Tuch SOFORT ab!
Secure one end of the aileron extension cord with adhesive tape
Wing joiner
Tragflachenverbinde
Center line
1- Using a pencil, mark the center of the brace.
2- Trial fit the wing joiner into one of the wing panels. It should
insert smoothly up to the center line marked above.
3- Slide the other wing half onto the dihedral brace until
the wing panel meet. If the fit is over tight, it may be
necessary to lightly sand the dihedral brace.
4- Check for the correct dihedral angle.
5- Mix approximately 30 minute epoxy and apply a generous amount of epoxy into the wing joiner cavity of one wing half.
6- Coat one half of the dihedral brace with epoxy up to the center line. Install the epoxy-coated side of the dihedral brace
into the wing joiner cavity up to the center line, marking sure that the “V” of the dihedral brace is positioned correctly
7- Do the same way with the other wing half.
8- 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. Clear off the excess epoxy.
WARNING: 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.
4- Servo mount / Servohalterung
A
Retract servo mount (plywood A,B,C)
Einziehfahrwerk servohalterung
FWU1
Schneiden Sie etwas
Folie weg
Cut away only the covering
FWU2
CA
CENTER
WING
SECTION
CA
A
FWU2
FWU1
BOTTOM
CA
CA
5- Retract servo / Einziehfahrwerk servo
Retract servo
Einbau des Servos fur das Einziehfahrwerk
X
Install the retract servo onto the retract servo mount and secure it in place with four screw (included with radio set).
Einbau des Servos fur das Einziehfahrwerk
/ Retract servo
CENTER
WING
SECTION
BOTTOM
6- Linkages / Ruderanlenkung
8-5/16”(~210mm)
RETRACT PUSHROD (SIDE VIEW)
Instruction how to build in the retracting landing gear
(This Gearis OPTIONAL )
Einbauhilfe bei Anbringen eines
Einziehfahrwerks (Optional
2” (~50mm) bestellbar; nicht im Baukasten enthalten!)
19/64”
(7.5mm)
Fahrwerkanlenkgestänge
(TOP VIEW)
1”(25mm)
With the retract and retract servo in the retracted position, mark the position where each of the pushrod will attach to the servo arm, a small piece of masking tape works well for this. Cut off the excess length each rod.
Link the servo and retract gear arm with push rod. Be sure to adjust the stroke so that the landing gear locks in both up and down position.
EINGEFAHREN AUSGEFAHREN
7- Fixed gear / Starres Fahrwerk
Main landing gear
3x12mm screw
..........8
3x20mm screw
......16
Nylon gear strap
.......4
3x20mm screw
Gear mount
1
Nylon gear strap
3x20mm
2mm
2
Gear mount x 2
2mm
3x20mm screw
Ply gear mount plate x 2
4
Square plastic x 2
Wing - bottom view
8- Fixed gear / Landegestange
ABS wheel well cover
ABS gear cover
4mm stellring/collar
2mm
3x10mm screw
2mm
3x20mm
3
Ply gear mount flat
Square plastic
ABS gear cover
3x10mm schraube/screw
..........8
2x6mm schraube/screw
..........4
4mm stellring/collar
..........2
CA
Bottom view / Ansicht von unten
1.5mm
CA
ABS gear strap
Gear mount
(hard wood)
9- Electric retract landing gear / Einziehfahrwerk
EXTENDED POSITION
ELECTRIC RETRACT
LANDING GEAR
RETRACTED
POSITION
2x6mm screw
RECEIVER
ON
ELECTRIC RETRACT
LANDING GEAR
GEAR
OFF
Bottom view /Ansicht von unten
2mm
10- Air scoop / Olkuhlerattrappe
Installing the wing to the fuselage and secure it in place using two 6x45mm nylon bolt.
Using the ABS air scoop (part B) as a template, trace around the outside edge of the ABS air-scoop and then remove it.
Using a sharp hobby knife, cut away the covering inside the lines. Not to cut into the wood.
Apply the ABS air scoop (part B) in place and secure with CA glue.
* WARNING: When removing any covering from the airframe, please ensure that you secure the cut edge with
CA or similar cement. This will ensure the covering remain tight.
ABS air scoop (part B)
1/4
6.5mm
Cut away the covering inside before install the air scoop*
Bottom view /Ansicht von unten
6x40mm nylon bolt
.........2
11- Air scoop / Olkuhlerattrappe
Using the ABS air scoop (part A) as a template, trace around the outside edge of the ABS air-scoop and then remove it.
Using a sharp hobby knife, cut away the covering inside the lines. Not to cut into the wood.
Apply the ABS air scoop (part A) in place and secure with CA glue.
CA
Bottom view /Ansicht von unten
1/4
6.5mm
ABS air scoop
(part A)
CA
Cut away the covering inside before install the air scoop*
* WARNING: When removing any covering from the airframe, please ensure that you secure the cut edge with CA or similar cement. This will ensure the covering remain tight.
12- Air scoop / Olkuhlerattrappe
Wing bolt block
(Ply wood)
Plastic mount nut
WING
Plastic air scoop
6x40 nylon bolt
13- Horizontal stabilizer / Hohenruder
1-Trial fit the horizontal stabilizer in place . Check the alignment
of the horizontal stabilizer. When you are satisfied with the
alignment, use a pencil to trace around the top and bottom
of the stabilizer where it meets the fuselage.
2-Remove the horizontal stabilizer from the fuselage. Using the
sharp hobby knife, carefully cut away the covering inside the
lines which were marked above.
3-Spread epoxy (30 minute) onto the top and
bottom of the horizontal stabilizer along the
area where the covering was removed and
to the fuselage where the horizontal stabilizer
mounts.
4-Install the horizontal stabilizer into the fuselage
and adust the alignment as described in steep 1
5-Wipe off any excess epoxy using a paper towel
and kerosene, do not use strong solvent or pure
alcohol to keep the colour of your model not fade.
Allow the epoxy to cure before proceeding to next
step.
Cut away only the covering both side
A B
Apply the epoxy both side
Cut away only the covering both side *
Securely glue together. If coming off during flight, you lose control of your air plane!
Vergewissern Sie sich, sauber geklebt zu haben. Andernfalls konnen Probleme mit der Flugeigenschaft auftreten!
A
90
O
90
O
A’
A = A’
B = B’
B B’
* WARNING: When removing any covering from the airframe, please ensure that you secure the cut edge with CA or similar cement. This will ensure the covering remain tight.
14- Vertical stabilizer / Hohenleitwer
A B
Apply the epoxy both side
1-Trial fit the vertical stabilizer in place . Check the alignment of the vertical stabilizer. When you are satisfied with the alignment, use a pencil to trace around the right and left of the stabilizer where it meets the fuselage.
2-Remove the vertical stabilizer from the fuselage. Using the sharp hobby knife, carefully cut away the covering inside the lines which were marked above.
3-Spread epoxy (30 minute) onto the right and left and bottom of the vertical stabilizer along the area where the covering was removed and to the fuselage where the vertical stabilizer mounts.
4-Install the vertical stabilizer into the fuselage and adust the alignment as described in steep 1.
Securely glue together. If coming off during flight, you lose control of your air plane!
5/64”
2.mm
Stab.
3/8” (10mm)
Elev.
Cut away only the covering both side*
B = B’
C = C’
B B’
Control horn
C C’
................1
2x12mm screw
..........2
* WARNING: When removing any covering from the airframe, please ensure that you secure the
cut edge with CA or similar cement. This will ensure the covering remain tight.
15- Elevator / Hohenruder
Apply a thin layer of machine oil or petroleum jelly to only the pivot point of the hinges on the elevator, then push the elevator and its hinges into the hinge slots in the trailing edge of the horizontal stabilizer.
When satisfied with the and alignment, hinge the elevator to the horizontal stabilizer using 5 minute epoxy. Make sure to apply a thin layer of epoxy 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.
Vergewissern Sie sich, sauber geklebt zu haben. Andernfalls konnen Probleme mit der Flugeigenschaft auftreten!
Stab.
5/64”
2.mm
3/8” (10mm)
Elev.
Apply the epoxy both side
A B
Control horn
................2
2x12mm screw
..........4
16- Tail gear / Heckspornrad
Hinge
Petroleum jelly
STABILIZER
5/64 in.(2mm) I.D collar
3
2
2x10mm screw
H
5
4
1
Bottom view /Ansicht von unten
1- Insert the tail wheel pushrod into the hole on the tail gear control
horn (as show).
2- Install the tail wheel control horn in place.
2x3mm screw
............1
2x10mm screw
............4
Tail wheel controlhorn
3- Instal the tail wheel gear in place.
4- Secure the tail wheel control horn in place using a 5/64”(2mm) screw set,
Ensure smooth non-binding movement.
.................1
5- Installing the tail wheel hatch (H) in place using a four 5/64x25/64”(2x10mm) self tapping screws.
2mm I.D collar
...............1
Tail landing gear
..........1
17- Electric Motor / Elektromotor
- Using a plywood motor mounting plate as a template, mark the fire wall where the four holes are to be drilled (1).
- Remove the plywood motor mounting plate and drill a 13/64”(5mm) hole through the fire-wall at each of the four marks
marked (2).
- Using a aluminum motor mounting plate as a template, mark the plywood motor mounting plate where the four holes are
to be drilled (3).
- Remove the aluminum motor mounting plate and drill a 1/8”(3mm) hole through the plywood at each of the four marks
marked (4).
FRONT-VIEW
Aluminum motor mounting plate
1
13/64”
5mm
2
Plywood motor mounting plate (2pcs)
! Align the mark on the plywood motor
mount with the mark on the fuselage.
5
3
4
1/8”
3mm
! Align the mark on the plywood motor mount
with the center lines on aluminum motor mount.
-Push the four 5x70mm bolts through the fire-wall as shown (5).
- Reposition the plywood motor mounting plate (2pcs) and secure it
in place with eight 5mm nuts and washers (6).
Note: B=B’(Side-view) and A=A’(Top-view)
-Attach the aluminum motor mounting plate on to the motor and
secure it in place with four screws ( included with motor set) (7).
-Attach the motor on to the plywood motor mounting plate and
secure it in place with four 3x15mm (1/8x19/32”)
screws(8).
6
7 - 8
B
SIDE-VIEW
B=B’
Firewall
B’
127mm
(4-3/4”)
A=A’
! Engine thrust on balk head
is already adjust at factory
A
TOP-VIEW
A’
5x70mm.......4
5mm nut.......12
5mm washer...16
3mm screw/nut...4
18- Engine mount / Motortrager
! Engine thrust on balk head
is already adjust at factory
B
B’
B=B’
A
FRONT-VIEW
13/64”
5mm
4x25mm screw
......4
19- Engine (two stroke) / 2T Motor
A
5” ~ 5-1/32”
(127~128mm)
! Align the mark on both mounts with the center mark on the fire wall
!
B
B’
! Align the engine center with fire wall marked line
!
A
Blind-nut
............4
4mm washer
.................4
A
6.5
3x25mm screw
...4
Nut
.............4
With hang silencer
20- Engine (four stroke) / 4T Motor
1/8
3.mm
A B
A
5” ~ 5-1/32”
(127~128mm)
With side silencer
Determine the angle for the engine mounts so the muffler will not contact the fuselage
1/8
3mm
! Engine thrust on balk head
is already adjust at factory
A
5” ~ 5-1/32”
(127~128mm)
21- Fuel tank / Treibstofftank
TOP VIEW Draufsicht
Battery hatch
Akkuklappe
To muffler
Rubber stopper
Filler tube
To engine
3x35mm screw
X
Magnetic piece
Magnet
22- Cowling installation
Motorhaube
Adhesive tape
Board
1~2mm
2.5x10mm.....4
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 above.
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
5” (126 to 127mm) .
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.
Again. Insert the cowl on to the fuselage and secure it in place with five 2x5mm screws.
127mm
Ruler
1/16”
1.5mm
1/16”
1.5mm
23- Servo installation
NOTE: Place of the servos may be change depend of engine
(Four-stoke or two-stroke engine)
24- Linkages / Ruderanlenkung
Bottom view /Ansicht von unten
Receiver area
Bottom view /Ansicht von unten
Elevator pushrod
Rudergestange
Tail wheel pushrod
Rudder pushrod
Elevator servo
Hohenruderservo
Rudder servo
Seitenruderservo
Throttle servo
Drosselservo
3mm set Screw
Elevator pushrod
Rudergestange
Connector
Gestangeanschluss
............1
Connector
Gestangeanschluss
............3
2 mm
Elevator pushrod
Rudergestange
X
25- Lipo Battery installation / LiPo Akku
Battery hatch
LiPo Battery
TOP VIEW
Draufsicht
Battery stand
Battery hatch
Akkuklappe
SIDE-VIEW / Seitenansicht
Battery stand
(3mm plywood)
Magnetic piece
Magnet
Bottom view /Ansicht von unten
26- Canopy / Kabinenhaube
2.x8mm.....4
CA
27- Balance / Schwerpunkt
4-1/4”(107 mm)
Note: Adjust the location of the battery pack to achieve this C.G location.
2mm Screw
5/64
2 mm
DO NOT try to fly an out-of-balance model !
(A + or - 5mm is fine)
Wing center section
28- Control surface / Ruderausschlage
1/4” (6mm)
1/4” (6mm)
AILERON / QUERRUDER
1-3/16”(30) mm
25/64”(10mm)
1-3/16”(30) mm
25/64”(10mm)
RUDDER / SEITENRUDER
ELEVATOR / HOHENRUDER
IMPORTANT: Flying your model at these throws will provide you with the greatest chance for successful first flights. If, after you have become accustomed to the way the Yak flies, you would like to change the throws to suit your taste that is fine. However, too much control throw could make the model difficult to control, so remember, “more is not always better”.
29- Decor / Aufkleber
VQA054 - Olive
C CC P
C CC P
VQA055 - Navy blue
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.
WARNING: Please do not clean your model with pure alcohol or strong solvent, only use liquid soap with water or use glass cleaner to clean on surface of your model to keep the colour not fade.
All details are subject to change without notice !
Technische Anderungen und Irrtumer vorbehalten !

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