- Clear Tx settings such as D/R, trims, subtrims, endpoints etc
- Set servo normal/reverse on all servos
- Set servo neutrals by firstly mounting servo arm as closely to neutral as possible and then sub-trim to perfectly neutral
Flybarless portion of the setup
Enter by <set>+<power on>
DIR setup
- Adjust push-rods so that main blade pitch is zero
- Set max collective pitch (up and down) using transmitter's "pitch swash AFR"
- Set right aileron and front elevator to 8 degrees
- Adjust rudder push-rod to travel midpoint on rudder axis (not zero rudder)
The throttle stick position where main pitch is 0 degree must be maintained for E.LIM, E.REV, A.LIM and A.REV setup
E.LIM setup
- Move the transmitter elevator stick forward, and then back to center position
E.REV setup
- Tilt the helicopter forward and check if swashplate is tilting correctly toward the back
A.LIM
- Move the transmitter aileron stick to the right and then back to center position
A.REV
- Tilt the helicopter right as shown in diagram, and check if swashplate is tilting correctly toward the left.
Press the SET button again, and the control unit will restart with all LED's flashing. This completes the flybarless portion of the setup process.
Enter by <set> for 2 seconds. Time-out after 10 seconds
Servo frame rate 1520μs or 760μs
- Push the transmitter rudder stick left or right to select the frame rate.
- For example, if rudder is pushed to the left (or right) and status led turns green, the frame rate is set to 1520μs. To set it to 760μs, the rudder stick need to be pushed from the center to the opposing end 3 times for the status led to turn red, indicating frame rate set to 760μs.
Digital or analog servo
- Use the transmitter's rudder stick to select DS/AS
Tail pitch adjustment
- Lift up the helicopter by hand, and turn it to the left (yaw) and check if the rudder servo is compensating to the right
- Use the transmitter's rudder stick to select either NOR/REV
Rudder travel limit
- Push the transmitter rudder stick left until tail pitch slider reaches the end, then center the rudder stick and wait 2 seconds for the status led to flash red
- Push the rudder stick right until tail pitch slider reaches the end, then center the rudder stick and wait 2 seconds for the status led to flash red.
Rudder delay
- The choice of small or large helicopter is done by moving the transmitter rudder stick left or right while observing the color of status led . For example, T-REX 500 and bigger the status led should be green and for T-REX 450 and smaller the status led should be red.
- The amount of rudder stick moved from center is the DELAY amount. When DELAY LED begins to flash, delay is at 0%. When rudder stick is pushed to the end, delay is at 100%.
Anti-torque (alla five LEDs are green)
- Right side up: Installed with3GX label facing up, anti-torque compensation set to positive (green status LED).
- Upside down: Installed with 3GX label facing down, anti-torque compensation set to negative (red status LED).
- Using the rudder stick to select either positive or negative anti-torque compensation.
Confirm the rudder settings by pushing the SET button.
Gyro gain
- For radio with built in gyro gain settings, gain can be adjusted directly. For example, 50%-100% setting on the radio translates to 0% - 100% gain in the heading lock mode; 50%-0% setting on the radio translates to 0%-100% gain in the normal (non-heading) lock mode.
- Actual gain value differs amongst servos and helicopters. The goal is to find the maximum gain without tail hunting. This can only be done through actual flight tests.
- The recommended starting point for transmitter's gyro gain setting should be 70~80% for hovering, 60~70% for idle-up. Value should be tuned under actual flight conditions by increasing to the maximum gain without tail hunting.
Enter by <full rudder>+<set> for 2 seconds. Time-out after 10 seconds
After entering setting mode, the STATUS LED will flash specific number of times to indicate specific settings.
During setting process, LED 1 to 5 indicate the rate of setting; flashing LED represents 10%, while steady lit LED represents 20%. For example, if LED 1 and LED2 are steady lit with LED3 flashing, the set rate is 2*20+10=50%.
One led flash to adjust aileron roll rate and elevator flip rate
- Moving the elevator stick to display and change elevator flip rate. 50% is default
- Moving the aileron stick will display and change aileron roll rate. 50% is default
- Elevator flip rate is adjusted based on aileron roll rate. [what does this mean?]
Two led flashes flashes twice to adjust elevator travel limit
- Check that there is no binding throughout the pitch range and adjust by moving the elevator stick to adjust the maximum travel without binding. For example 50% means total elevator travel range is 8+0.5*8 = 12 degrees. 70% default
Three led flashes to adjust aileron travel limit
- Check that there is no binding throughout the pitch range and adjust by moving the aileron stick to adjust the maximum travel without binding. 70% default
Four led flashes to set swashplate dampening
- Move elevator stick is for adjusting collective pitch dampening rate. 50% is default
- Move the aileron stick to adjust cyclic (for both aileron and elevator) pitch dampening rate. 50% is default
Five led flashes to adjust the swashplate acceleration
- Move the elevator stick to adjust collective pitch acceleration rate. 0% is default
- Move the aileron stick to adjust cyclic (for both aileron and elevator) pitch acceleration rate. 0% is default
- Note: Recommend to use direct power supply if acceleration is higher than 50%.
Throttle calibration (v2.1)
- Reset throttle curve and pitch curve to default 0-100.
- Power up transmitter, and set throttle stick at lowest position.
- Enter by <set>+<power on> until all 5 LED are lit
- Push the throttle stick on transmitter to the maximum. LED will go off and system re-boots. Finished