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Instruction Manual

Instruction Manual

ASK-21 ELECTRIC 3200

Instruction Manual

ASK-21 ELECTRIC 3200

Instruction Manual

ASK-21 ELECTRIC 3200

Instruction Manual

ASK-21 ELECTRIC 3200

Instruction Manual

ASK-21 ELECTRIC 3200

Instruction Manual

ASK-21 ELECTRIC 3200

Instruction Manual

ASK-21 ELECTRIC 3200

Instruction Manual

ASK-21 ELECTRIC 3200

Instruction Manual

ASK-21 ELECTRIC 3200

Instruction Manual

ASK-21 ELECTRIC 3200

I/C FLIGHT GUIDELINES

When  ready  to  fly,  first  extend  the 

transmitter aerial.

Operate  the  control  sticks  on  the 

transmitter  and  check  that  the  control 

surfaces  move  freely  and  in  the 

CORRECT directions.

ALWAYS

  land  the  model  INTO  the 

wind, this ensures that the model lands 

at the slowest possible speed.

Switch on the transmitter.

Switch off the transmitter.

Check that the transmitter batteries 

have adequate power.

Switch off the receiver.

Switch on the receiver.

ALWAYS

 take off into the wind.

Check  that  the  wings  are  correctly 

fitted to the fuselage.

If the model does not respond correctly 

to  the  controls,  land  it  as  soon  as 

possible and correct the fault.

Empty the fuel tank after flying, fuel left 

in  the  tank  can  cause  corrosion  and 

lead to engine problems.

Made in Vietnam

1

TOOLS AND SUPPLIES NEEDED.

• Medium C/A glue.
• 30 minute epoxy.
• 6 minute epoxy.
• Hand or electric drill.
• Assorted drill bits.
• Modeling knife.
• Straight edge ruler.
• 2 bender plier.
• Wire cutters.
• Masking tape.
• Thread lock.
• Paper towels.
• Rubbing alcohol

SUGGESTION 

To avoid scratching your new airplane, do not unwrap 
the pieces until they are needed for assembly. Cover 
your  workbench  with  an  old  towel  or  brown  paper, 
both  to  protect  the  aircraft  and  to  protect  the  table. 
Keep  a  couple  of  jars  or  bowls  handy  to  hold  the 
small parts after you open the bag.

NOTE:

Please trial fit all the parts. Make sure you have the 
correct parts and that they fit and are aligned properly 
before gluing! This will assure proper assembly. The 
ASK-21  ELECTRIC  3200 ARF  1/5  SCALE  is  hand 
made  from  natural  materials,  every  plane  is  unique 
and  minor  adjustments  may  have  to  be  made. 
However,  you  should  find  the  fit  superior  and 
assembly simple.

The painted and plastic parts used in this kit are fuel 
proof. However, they are not tolerant of many harsh 
chemicals  including  the  following:  paint  thinner,  C/A 
glue accelerator, C/A glue debonder and acetone. Do 
not  let  these  chemicals  come  in  contact  with  the 
colors on the covering and the plastic parts.

SAFETY PRECAUTION:

•  This is not a toy
•  Be sure that no other flyers are using your radio 

frequency.

•  Do not smoke near fuel
•  Store  fuel  in  a  cool,  dry  place,  away  from 

children and pets.

•  Wear safety glasses.
•  The glow plug clip must be securely attached to 

the glow plug.

•  Do not flip the propeller with your fingers.
•  Keep loose clothing and wires away from the propeller.
•  Do not start the engine if people are near. Do not 

stand in line with the side of the propeller.

•  Make engine adjustments from behind the propeller 

only. Do not reach around the spinning propeller.

PREPARATIONS

Remove  the  tape  and  separate  the  ailerons  from 
the  wing  and  the  elevators  from  the  stab.  Use  a 
covering  iron  with  a  covering  sock  on  high  heat  to 
tighten  the  covering  if  necessary.  Apply  pressure 
over  sheeted  areas  to  thoroughly  bond  the 
covering to the wood.

1

INSTALLING THE AILERONS

1.  Test fit the ailerons to the wing with the hinges. 

If the hinges don’t remain centered, stick a pin 
through  the  middle  of  the  hinge  to  hold  it  in 
position.

TEMPORARY PIN

TO KEEP HINGE

CENTERED

2

CA glue

2.  Apply six drops of thin CA to the top and bottom 

of each hinge. Do not use CA accelerator. After 
the  CA  has  fully  hardened,  test  the  hinges  by 
pulling on the aileron.

2

3.    Place  the  servo  into  the  servo  tray.  Center  the 

servo within the tray and drill 1,6mm pilot holes 
through  the  block  of  wood  for  each  of  the  four 
mounting screws provided with the servo.

Remove the covering

3

INSTALLING THE AILERON SERVOS

1.   Install  the  rubber  grommets  and  brass  eyelets 

onto the aileron servo.

2.  Using  a  modeling  knife,  remove  the  covering 

from over the pre-cut servo arm exit hole on the 
aileron  servo  tray  /  hatch.  This  hole  will  allow 
the  servo  arm  to  pass  through  when  installing 
the  aileron pushrods.

4

6.  Repeat  step  #  2  -  #  5  to  install  the  second 

aileron servo in the opposite wing half. 

5.  Place  the  aileron  servo  tray  /  hatch  into  the 

servo  box  on  the  bottom  of  the  wing  and  drill 
1,6mm  pilot  holes  through  the  tray  and  the 
servo box for each of the four mounting screws. 
Secure  the  servo  tray  in  place  using  the 
mounting screws provided ( 2mm x 12mm ).

4.  Using the thread as a guide and using masking 

tape,  tape  the  servo  lead  to  the  end  of  the 
thread: carefully pull the thread out. When you 
have  pulled  the  servo  lead  out,  remove  the 
masking  tape  and  the  servo  lead  from  the 
thread.

Servo lead

5

6

7

3

9.  Repeat  step  #  4  -  #  8  to  install  the  second 

aileron  linkage.  After  both  linkages  are 
completed,  connect  both  of  the  aileron  servo 
leads  using  a  Y-harness  you  have  purchased 
separately.

11

12

Silicone Tube

10

2.  Attach the clevis to the outer hole in the control 

horn. Install a silicone tube on the clevis.

3.    Locate  one  nylon  servo  arm,  and  using  wire 

cutters, remove all but one of the arms. Using a 
2mm drill bit, enlarge the third hole out from the 
center  of  the  arm  to  accommodate  the  aileron 
pushrod wire.

4.  Plug  the  aileron  servo  into  the  receiver  and 

center the servo. Install the servo arm onto the 
servo. The  servo  arm  should  be  perpendicular 
to the servo and point toward the middle of the 
wing.

5.    Center  the  aileron  and  hold  it  in  place  using  a 

couple of pieces of masking tape.

6.  With  the  aileron  and  aileron  servo  centered, 

carefully  place  a  mark  on  the  aileron  pushrod 
wire where it crosses the hole in the servo arm.

7.    Using  pliers,  carefully  make  a  90  degree  bend 

down  at  the  mark  made.  Cut  off  the  excess 
wire, leaving about 4mm beyond the bend.

8.  Insert  the  90  degree  bend  down  through  the 

hole  in  the  servo  arm.  Install  one  nylon  snap 
keeper  over  the  wire  to  secure  it  to  the  arm. 
Install  the  servo  arm  retaining  screw  and 
remove the masking tape from the aileron.

INSTALLING THE AILERON LINKAGES

1. Working with the aileron linkage for now, thread 

one  nylon  clevis  at  least  14  turns  onto  one  of 
the 2mm x 180mm threaded wires.

9

4

4.   Test the position of the elevator and adjust it as 

shown.

18

Screw

17

Dihedral brace

16

Remove the covering

23

24

25

26

27

20

5

INSTALLING THE main landing gear

1.  The full set wheel.

INSTALLING THE WING

1.  Attach the wing to the fuselage as picture.

INSTALLING THE ELEVATOR

- Repeat step #1 - #2 from installing the aileron

to install the elevator.

19

2.   Secure the collars.

3.   Glue the wooden plate to the fuselage.

6

28

Remove the covering

29

30

32

31

Control horn elevator

33

Servo lead

34

Screw

INSTALLING THE CONTROL HORNS 
AND LINKAGES

Repeat these step as installing the aileron control 
horn and linkages.

7

INSTALLING THE RUDDER

Repeat  these  step  from  installing  the  aileron  to 
install the rudder.

INSTALLING THE CONTROL HORN AND 
LINKAGE.

Repeat these step as installing the aileron control 
horn and linkages.

44

INSTALLING THE towing servo

1.  Install the metal connector to the servo arm.

2.    Bend “L” the metal rod as the picture below.

3.    Place the servo arm to the servo and secure it.

8

42

43

35

36

37

38

39

40

41

45

46

!

INSTALLING THE RECEIVER AND BATTERY

1.    Plug  the  servo  leads  and  the  switch  lead  into 

the  receiver.  You  may  want  to  plug  an  aileron 
extension into the receiver to make plugging in 
the  aileron  servo  lead  easier  when  you  are 
installing  the  wing.  Plug  the  battery  pack  lead 
into the switch.

2.  Wrap  the  receiver  and  battery  pack  in  the 

protective  foam  to  protect  them  from  vibration. 
Use a rubber band or masking tape to hold the 
foam in place.

     

Do  not  permanently  secure  the  receiver  and 

battery until after balancing the model.

INSTALLING THE MOTOR

47

48

49

Remove the covering

50

Screw

51

52

ESC

Battery

9

-    Glue the plastic cover to the fuselage.

75mm

BALANCING

1.  It  is  critical  that  your  airplane  be  balanced 

correctly.  Improper  balance  will  cause  your 
plane to lose control and crash.

   THE CENTER OF GRAVITY IS LOCATED 75mm 

BACK  FROM  THE  LEADING  EDGE  OF  THE 
WING,  AT  THE  FUSELAGE.  This  location  is 
recommended  for  initial  test  flying  and 
trimming. BALANCE A PLANE UPSIDE DOWN 
WITH THE FUEL TANK EMPTY.

2.  Mount the wing to the fuselage. Using a couple 

of  pieces  of  masking  tape,  place  them  on  the 
top  side  of  the  wing  75mm  back  from  the 
leading edge, at the fuselage sides.

3.  Turn  the  airplane  upside  down.  Place  your 

fingers  on  the  masking  tape  and  carefully  lift 
the plane .

4.  If the nose of the plane falls, the plane is nose 

heavy.  To  correct  this  first  move  the  battery 
pack  further  back  in  the  fuselage.  If  this  is  not 
possible  or  does  not  correct  it,  stick  small 
amounts  of  lead  weight  on  the  fuselage  under 
the  horizontal  stabilizer.  If  the  tail  of  the  plane 
falls,  the  plane  is  tail  heavy.  To  correct  this, 
move the battery and receiver forward or if this 
is  not  possible,  stick  weight  into  the  firewall. 
When  balanced  correctly,  the  airplane  should 
sit level or slightly nose down when you lift it up 
with your fingers.

RECOMMENDED MOTOR AND BATTERY SET UP            

- Motor: OS OMA – 3825-750 (Not included)

- Propeller: 12x8 ; 13x8 (not included)

- Lipo cell: 3-4 cells / 3200 – 4000mAh 

  (not included)

- Esc: 50-80 A (not included)

!

LATERAL BALANCE

       

After  you  have  balanced  a  plane  on  the  C.G. 

You  should  laterally  balance  it.  Doing  this  will 
help the airplane track straighter.

5.  Turn the airplane upside down. Attach one loop 

of  heavy  string  to  the  engine  crankshaft  and 
one to the tail wheel wire. With the wings level, 
carefully lift the airplane by the string. This may 
require two people to make it easier.

6.  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.

10

54

CONTROL THROWS

1.  We highly recommend setting up a plane using 

the control throws listed.

2.   The  control  throws  should  be  measured  at  the 

widest point of each control surface.

3.    Check  to  be  sure  the  control  surfaces  move  in 

the correct directions.

Aileron Control

10mm 

10mm 

Rudder Control

30mm 

30mm 

Elevator Control

8mm 

8mm 

FLIGHT PREPARATION

PRE FLIGHT CHECK
1.  Completely charge your transmitter and receiver 

batteries  before your first day of flying.

2.  Check  every  bolt  and  every  glue  joint  in  your 

plane  to  ensure  that  everything  is  tight  and  well 
bonded.

3.   Double check the balance of the airplane. 
4.   Check the control surface.
5.    Check  the  receiver  antenna  .  It  should  be  fully 

extended and not coiled up inside the fuselage.

6.   Properly balance the propeller.

 Aileron  : 10mm up 

10mm down

 Elevator : 8mm up         8mm down
 Rudder  : 30mm right  30 mm left

I n s t r u c t i o n   M a n u a l

8

3. Repeat step # 1 - # 2 to install the control horn 

on the opposite aileron.

21

CA glue

CA glue

CA glue

CA glue

CA glue

Trim the plastic

22

Remove the plastic

Remove the covering

Servo lead

Remove the covering

CA glue

CA glue

CA glue

CA glue

- Control throw Ailerons: 

Low: 10mm up/down, 

  10% expo; High: 12mm up/down, 10% expo

- Control throw Elevators: 

Low: 8mm up/down, 

  12% expo; High: 12mm up/down, 12% expo

- Control throw Rudder: 

Low: 30mm right/left, 

  15% expo; High: 55mm right/left, 15% expo

- Motor: 

brushless outrunner 700-800 W, 750 KV

- Experience level: 

Intermediate

- Plane type:

 Scale sailplane

RECOMMENDED MOTOR AND BATTERY SET UP

- Motor:

 OS OMA – 3825-750 (Not included)

- Propeller:

 12x8 ; 13x8 (not included)

- Lipo cell:

 3-4 cells / 2400 – 3000mAh (not included)

- Esc:

 50-80 A (not included)

RIGHT

WRONG

INSTALLING THE CONTROL HORNS

1.  One aileron  control horn in positioned  on each 

aileron.  Using  a  ruler  and  a  pen,  locate  and 
mark  the  location  of  the  control  horn.  It  should     
be mounted on the bottom side of the aileron at 
the  leading  edge,  in  line  with  the  aileron 
pushrod.

2.  Drill two 1.6mm holes through the aileron using 

the  control  horn  as  a  guide  and  screw  the 
control horn in place. 

13

WING TIP

INSTALLING THE electric air brakes

(not included with the kit)

1.  Remove the covering from the top of the wing.

14

WING TIP

15

WING TIP

2.  Install the air brake into the bay.

2.   Slide the joiner to the wing and to the fuselage.

3.   Secure the wing.

Secure the servo.

Secure the servo to the plate.

Slide the servo lead to the fuselage.

Secure the rudder servo mount.

Secure the control horn.

Install the push rod linkage.

Line

Wooden engine mount.

Secure the motor and the connector.

Install the push rod linkages.

Secure the horizontal stabilizer to the fuselage.

Secure the elevator servo mount

SPECIFICATION

- Wingspan: 

3200mm (125,9 in)

- Length: 

1650mm (64,9 in)

- Flying weight: 

3000gr – 3200gr

- Wing area: 

64.5 dm2

- Wing loading: 

46g/dm2

- Wing type: 

HQ profile

- Radio: 

4 channel – 4 mini hi-torque servo : 

  2 aileron; 1 elevator; 1 rudder (not included)

- Servo mount : 

12mm X 24mm

- Flap: 

2 electric flaps 440mm (not included) 

- Spinner size: 

Aluminum H hub propeller 

  

holder, shaft 6mm (not included)

- Propeller: 

suit with your engine 

- Gravity CG: 

75 mm (2.95 in) Back from  the 

  

leading edge of the wing, at the fuselage

53

Glue the plastic air cooler 

Содержание ask-21 electric 3200

Страница 1: ... Motor OS OMA 3825 750 Not included Propeller 12x8 13x8 not included Lipo cell 3 4 cells 2400 3000mAh not included Esc 50 80 A not included SPECIFICATION Wingspan 3200mm 125 9 in Length 1650mm 64 9 in Flying weight 3000gr 3200gr Wing area 64 5 dm2 Wing loading 46g dm2 Wing type HQ profile Radio 4 channel 4 mini hi torque servo 2 aileron 1 elevator 1 rudder not included Servo mount 12mm X 24mm Flap...

Страница 2: ...onder and acetone Do not let these chemicals come in contact with the colors on the covering and the plastic parts SAFETY PRECAUTION This is not a toy Be sure that no other flyers are using your radio frequency Do not smoke near fuel Store fuel in a cool dry place away from children and pets Wear safety glasses The glow plug clip must be securely attached to the glow plug Do not flip the propeller...

Страница 3: ...ervo tray hatch into the servo box on the bottom of the wing and drill 1 6mm pilot holes through the tray and the servo box for each of the four mounting screws Secure the servo tray in place using the mounting screws provided 2mm x 12mm 4 Using the thread as a guide and using masking tape tape the servo lead to the end of the thread carefully pull the thread out When you have pulled the servo lea...

Страница 4: ... 5 Center the aileron and hold it in place using a couple of pieces of masking tape 6 With the aileron and aileron servo centered carefully place a mark on the aileron pushrod wire where it crosses the hole in the servo arm 7 Using pliers carefully make a 90 degree bend down at the mark made Cut off the excess wire leaving about 4mm beyond the bend 8 Insert the 90 degree bend down through the hole...

Страница 5: ...7 Dihedral brace 16 Remove the covering 20 INSTALLING THE main landing gear 1 The full set wheel INSTALLING THE WING 1 Attach the wing to the fuselage as picture 19 2 Secure the collars 14 WING TIP 15 WING TIP 2 Install the air brake into the bay 2 Slide the joiner to the wing and to the fuselage 3 Secure the wing ...

Страница 6: ...tep 1 2 from installing the aileron to install the elevator 3 Glue the wooden plate to the fuselage INSTALLING THE CONTROL HORNS AND LINKAGES Repeat these step as installing the aileron control horn and linkages 21 CA glue CA glue CA glue CA glue CA glue Trim the plastic 22 Remove the plastic ...

Страница 7: ... 32 31 Control horn elevator 33 Servo lead 34 Screw INSTALLING THE RUDDER Repeat these step from installing the aileron to install the rudder 35 Secure the servo Install the push rod linkages Secure the horizontal stabilizer to the fuselage Secure the elevator servo mount ...

Страница 8: ... step as installing the aileron control horn and linkages 42 43 36 37 38 39 40 41 Remove the covering Servo lead Remove the covering CA glue CA glue Secure the servo to the plate Slide the servo lead to the fuselage Secure the rudder servo mount Secure the control horn Install the push rod linkage ...

Страница 9: ...ant to plug an aileron extension into the receiver to make plugging in the aileron servo lead easier when you are installing the wing Plug the battery pack lead into the switch 2 Wrap the receiver and battery pack in the protective foam to protect them from vibration Use a rubber band or masking tape to hold the foam in place Do not permanently secure the receiver and battery until after balancing...

Страница 10: ...ne upside down Place your fingers on the masking tape and carefully lift the plane 4 If the nose of the plane falls the plane is nose heavy To correct this first move the battery pack further back in the fuselage If this is not possible or does not correct it stick small amounts of lead weight on the fuselage under the horizontal stabilizer If the tail of the plane falls the plane is tail heavy To...

Страница 11: ... airplane 10 CONTROL THROWS 1 We highly recommend setting up a plane using the control throws listed 2 The control throws should be measured at the widest point of each control surface 3 Check to be sure the control surfaces move in the correct directions Aileron Control 10mm 10mm Rudder Control 30mm 30mm Elevator Control 8mm 8mm FLIGHT PREPARATION PRE FLIGHT CHECK 1 Completely charge your transmi...

Страница 12: ...t possible speed Switch on the transmitter Switch off the transmitter Check that the transmitter batteries have adequate power Switch off the receiver Switch on the receiver ALWAYS take off into the wind Check that the wings are correctly fitted to the fuselage If the model does not respond correctly to the controls land it as soon as possible and correct the fault Empty the fuel tank after flying...

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