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Aileron Control (CH1): 

When the aileron stick 

is mover to the right, the right aileron is raised 
and the left aileron is raised and the left aileron 
is lowered and the helicopter banks to the right. 
When the aileron stick is moved to the left, the 
ailerons move in the opposite direction and the 
helicopter banks left. To level the helicopter, the 
aileron  stick  must  be  move  in  the  opposite 
direction and back to center. 
 

Elevator  Control  (CH2): 

When  the  elevator 

stick  is  pulled  back,  the  tail  elevator  is  raised 
and  the  tail  of  the  helicopter  is  forced  down, 
thus causing the model to climb (Up Operation), 
When the elevator stick is pushed forward, the 
elevator  is  lowered,  the  tail  of  the  model  is 

forced up, thus causing the model to descend 
(Down Operation). 
 

Throttle Control (CH3): 

When the throttle stick 

is  pulled  back,  the  engine  throttle  lever  arm 
moves to the slow (Low Speed) side. When the 
throttle  stick  is  pushed  forward,  the  throttle 
lever arm moves to the High (High Speed) side. 
 

Rudder Control (CH4): 

When the rudder stick 

is moved to the right, the rudder moves to the 
right and nose points to the right, thus causing 
the model to turn right. When the rudder stick is 
moved to the left, the rudder moves to the left

 

and the nose points to the left, thus causing the 
model to turn left. 

 

SERVO INSTRLLATION 

All servos should be mounted as shown in the 
model’s instructions. Use the rubber grommets, 
screws  and  brass  eyelets  supplied  when 
mounting your servos.   
 
Do not over-tighten the mounding screws. The 
servos  should  be  able  to  move  slightly  to 
compensate  for  engine  vibration.  For  each 
servo,  use  a  servo  horn  long  enough  to 
accommodate the entire range of movement for 
that particular control.   
 
When  mounting  the  servos,  make  sure  the 
pushrods are not too loose or bind in anyway. 
Pushrods  should  be  capable  of  operating  the 
full  range  of  the  servo.  This  can  be  tested  by 
moving  the  transmitter  sticks  to  maximum 

positions  several  times  while  observing  the 
movement of the control services. If a servo is 
binding or sticks in flight, a greater current drain 
on  the  battery  is  applied,  thus  shortening  the 
flight time of the model. Binding can also cause 
damage to the servo and loose linkages could   
result in poor control of the model.   

 

Because  there  are  varieties  of  specific 
applications  for  servos  in  R/C  modeling, 
different  servos  are  designed  for  different 
applications. 

 

REVCEIVER INSTALLATION 

After  the  receiver  and  servos  are  mounted  in 
your model, connect the receiver to servos and 
switch harness per the diagram below. Always 
insert the servo and battery or switch harness 
connector  into  the  receiver  firmly,  to  ensure 
solid  physical  and  electrical  connections  are 
made.   
 
Turn on the transmitter, then the receiver switch 

harness.  Make  sure  all  servos  operate           

 

according  to  the  movement  of  the  transmitter 
sticks.  Center  all  trim  levers,  turn  off  the 

Summary of Contents for AT402

Page 1: ...Radio Control Transmitter AT402 INSTRUCTION MANUAL Digital Proportional Radio Control System Taizhou Best Team Technology Limited www rcmodel net ...

Page 2: ...turn Off the transmitter power switch Failure to follow this order could cause the engine to go to full throttle and cause an injury Do not make adjustments to the radio system while the engine is running unless absolutely necessary Failure to do so could cause the engine to accidentally go to high speed and cause an injury The transmitter is designed for use with 8 dry cell Non rechargeable AA si...

Page 3: ...ttle trim lever model 1 Elevator trim lever model 2 Carrying bar Elevator model 1 Throttle model 2 rudder stick Throttle model 1 Elevator model 2 Aileron stick Rudder trim lever Aileron trim lever Hook LED Power on Power switch in the upper position the power is turned on Crystal Jack Battery Box Cover Use when replacing the battery Battery Box Charging Jack Charging jack when the transmitter was ...

Page 4: ...unted as shown in the model s instructions Use the rubber grommets screws and brass eyelets supplied when mounting your servos Do not over tighten the mounding screws The servos should be able to move slightly to compensate for engine vibration For each servo use a servo horn long enough to accommodate the entire range of movement for that particular control When mounting the servos make sure the ...

Page 5: ...of gravity is at the prescribed position Before making and adjustments set all the servo reverser switches on the front of the transmitter to the lower NOR position Switch the switches with a small screwdriver Turn on the transmitter and receiver power switches and make the following adjustments 1 Neutral Adjustment Check the aileron elevator and rudder neutral adjustment and left right up down th...

Page 6: ...oves up and down on the horizontal stabilizer of an aircraft It usually controls up and down Linkage Mechanism that connects the servos and the fuselage control surfaces Neutral Means the neutral position It is the state in which a transmitter stick returns to the center when not operated Normal NOR For the servo reversing function it is the normal side the opposite side is the reverse side Rudder...

Page 7: ...y one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician for help This equipment complies with FCC radiation exposure limits set forth for uncontrolled e...

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