ALZRC 3GYS Instructions Manual Download Page 9

9.8 Servo position adjustment limit

When the screen shows "Servo reverse" press the DOWN/DATA- key to display "Servo limit", and then press 
ENTER to select it.

Move the rudder stick to the full left and right position, and adjust the "Tail limit A" and "Tail limit B" so that the 
maximum travel is used without any binding at the limit. Press ENTER to change the limit and BACK when 

finished.
Move the Aileron stick full left and right, and adjust the “Aileron limit” to ensure the swashplate is at no point 
jammed and stalling the servos.
Move the Elevator stick full up and down, and adjust the “Elevator limit” to ensure the swashplate is at no point 
jammed and stalling the servos.

When finished, press the BACK key to return to "Servo limit".

9.9 Main rotor collective pitch direction and range

When the screen shows "Servo limit", press the DOWN/DATA- key to display "Collective range", and then 
press ENTER to select it.

Move the throttle stick to the top and check the collective moves in the correct direction. If not, change the 
Collective range to a negative number of the same value. Check the collective for the required pitch with the 
use of a pitch gauge, and adjust the range (-125 to 125) until this is achieved. This is usually between 10 and 
12 degrees. Check for equal pitch in both directions. If they are not the same, then recheck the servo trim, 
transmitter end points and that the Tx pitch curve is straight, from minimum to maximum pitch.

When finished, press the BACK key to return to "Collective range".

9.10 Gyro direction

When the screen shows "Collective range", press the DOWN/DATA- key to display "Gyro direction", and then 
press ENTER to select it.

Switch the tail to locked tail mode. Rotate the helicopter and check the movement of the tail pitch. The tail 
pitch should change in the opposite direction, as if to stop the rotation. If it does not, then change the "Yaw:" 

Summary of Contents for 3GYS

Page 1: ...Operating temperature 10 to 50 Maximum angular rate 800 degrees sec Support for the rudder servo 1 52ms analog servo 1 52ms digital servo 760us digital servo 960us digital servo Support for swashplate...

Page 2: ...ontal alignment on a stable platform as far as possible away from the engine and other electronic devices the gyro should be installed using double sided foam adhesive between the gyro bottom and gyro...

Page 3: ...copters to 12 5mm 13mm 500 helicopters to 14mm 14 5mm 600 level and above to 14 5mm 15mm helicopter 6 2 Rudder servo Firstly verify that tail rotor mechanical parts are installed correctly and move sm...

Page 4: ...internal fine tuning value Sub trim to zero Ensure that all swashplate and tail rotor mixing functions are turned off Initially adjust the pitch curve to be a straight line from minimum to maximum pi...

Page 5: ...ht Note that U up is stick up and not up elevator Position the throttle at mid stick and adjust all four channels on the monitor display so the value shows 0 This is done by using the transmitters int...

Page 6: ...es for the gyro shown earlier in the manual to match the actual installation in the helicopter When finished press the BACK key to return to Installation Direction 9 3 Download model data stored in th...

Page 7: ...N DATA keys to select the required servo type When finished press the BACK key to return to Tail servo type 9 5 Model type selection helicopter swashplate type selection When the screen shows Tail ser...

Page 8: ...nd down and check that all of the servos move in the same direction and that the ailerons and elevator also operate correctly If not adjust the Servo 1 Servo 2 Servo 3 symbol It may sometimes be neces...

Page 9: ...OWN DATA key to display Collective range and then press ENTER to select it Move the throttle stick to the top and check the collective moves in the correct direction If not change the Collective range...

Page 10: ...For the first flight these values should be left as the default If the helicopter drifts in the hover increase the roll and pitch gain If the helicopter oscillates in the hover reduce the roll and pit...

Page 11: ...e mechanical structure of the helicopter checking for loose screws and mechanical parts that are badly worn Always check before each flight that the helicopter s mechanical movement is smooth If durin...

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