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PG-2000II - R/G (Remote Gain)
1 - Insure the end point settings (e.g. ATV or EPA) for the rudder channel and gear/aux channel (the channel that you have plugged the RED gain lead into) are set at 100 and 100. If you have a radio that has special channel 5 gyro software then set this at max ATV on both ends.
2 - Insure that your rudder sub-trim and rudder trim are set in the middle.
3 - Insure that the Revo Mixing settings are at an initial setting of 18%.
4 - With the TX turned on and the tail rotor servo / gyro connected, attach the tail rotor servo arm so that it is at 90 degrees to the tail rotor control rod when the TX stick is centered.
Helicopter Servo Set-up:
1 - (As Before)
2 - Insure the tail rotor control rod, tail rotor bellcrank and tail rotor control slider are set up mechanically as per the instructions in your helicopter kit manual.
3 - Attach the ball joint or Z-bend of the tail rotor control rod to the tail rotor servo arm at a distance of 10 to14 mm from center.
4 - Turn on your radio, leaving the tail rotor control rod disconnected from the servo arm. Now move the tail rotor control stick on the TX fully to the left and fully to the right and try to attach the control rod when at both ends. If there is not enough rod travel to allow this (binding) then move the attachment point further in on the servo arm. If there is room for even more movement of the control rod at each end, then move the attachment point further out on the servo arm.
5 -Move the TX rudder control stick fully to the left and slowly rotate the tail rotor through one complete rotation, and note any binding. Do the same with the TX rudder control stick set fully to the right. If there is binding anywhere, investigate and adjust the servo arm attachment points accordingly.
Final Bench Adjustments
1 - Turn on the transmitter, and then the receiver. DO NOT move the helicopter until the gyro has initialized. The green LED at the top left of the gyro will flash green for a few seconds then turn to a solid green, this will indicate that the gyro is now initialized. NOTE: whenever the radio is turned on before flight, it is important that you allow time for this initialization to take place before moving the helicopter.
2 - Check for proper rudder direction. With the tail rotor in the vertical position, and looking from the rear of the helicopter, move the TX stick fully to the right. Note the TRAILING edge of tail rotor blades, they should move to the right. With full left stick, they should move to the left. If they do not, then reverse the rudder throw in the TX.
3 - Check for the proper gyro direction. With the radio on and the gyro initialized, rotate the nose of the helicopter to the right and insure that it causes the trailing edge of the tail rotor blades to move to the right.
4 - Set the TX gain to 75% and 45%
A - If you are using a radio that does not have specific gain software, then the gain of the gyro will be adjusted by the settings of the ATV's in whatever aux channel you have used. Settings of 0 to 100 ATV in one direction will adjust gains upward from 50% to 100% relatively (e.g. 0 ATV is 50% gain, 50 ATV is 75% gain and 100 ATV is 100% gain). Settings of 0 to 100 ATV in the other direction will adjust gains downwards from 50% to 0% (e.g. 0 ATV is 50% gain, 50 ATV will be 25% gain and 100 ATV will be 0% gain).
B - If you are using channel 5 of a TX that has gyro gain specific software then you can adjust the two switch settings directly with the percentage number you desire. In this case, I would suggest 75% and 65% for a start setting.
C - If you have a radio in which there is no channel available for remote gain settings then you just have to leave the aux lead free and you will be able to operate the gyro as a single gain unit, using the mechanical pot on the front of the gyro to adjust the gain. Clockwise rotation will increase gain and counter-clockwise rotation will decrease the gain. A good place to start would be a setting of about half way.
Field/Flight Gyro Adjustments to optimize gain settings.
1 - Setting the gain at hover rotor speeds.
Insure the gain channel switch is in the position that selects the previously set 75% gain. Bring the helicopter into a hover. If the tail wags, decrease the gain setting until it stops. If it does not wag, then increase the gain settings until it just starts to wag. Then decrease slightly and test to insure no wag when giving a rudder command and releasing it. Then switch to the other gain setting and set the gain there to 15% less.
2 - Setting the gain at the higher speeds for aerobatics and fast forward flight.
Set the gain channel switch to the position that selects the lower of your two gain settings. Take the helicopter into fast forward flight. If the tail wags during any maneuver then turn down this gain setting until it stops.
3 - In the hover, set the rudder trim so that the helicopter heading does not drift when pointed directly into the wind.
Setting the Revo Mixing in the TX.
1 - Set your engine to the proper needle settings in the hover and at full throttle. Also insure your throttle and pitch curves are set to give a constant engine and rotor speed at all collective settings. Only then can you set the revo mixing for more precise control of your rudder through all maneuvers.
2 - From a hover into the wind, apply FULL throttle / collective and let the heli climb straight up for about 100 feet. Note if the heli yaws left or right through the climb, if it yaws in the opposite direction that the rotor turns, increase the UP revo mixing. If it yaws the other way, decrease the UP revo.
3 - Then from these climbs, descend at full down stick for a moment and note
the yaw direction. As in step 2, increase or decrease the DOWN revo mixing until
it will descend with no change.
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