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03-01-2017 03:08 AM  16 months agoPost 1



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First, in the adjustment of the tail rudder sensitivity, it is recommended to cancel the speed function, because sometimes the speed will also cause the goldfish tail of the false impression and the problem lies in the VBar tail rudder before the first to confirm the following matters.

1. Determine the smoothness of the tail axis. Remove the tail rudder head, slip sleeve in the whole trip on the back and forth, whether there is a smooth point, most of the situation is the right-hand, that is, the tail axis slip to the direction of the tail box (inside) more likely to ring. , Remove the tail rotor, wrap the tail shaft with cotton cloth. Then turn the main rotor 30 seconds by hand, should be able to clean the horizontal axis.

2. Determine the difference between the left and right border values ​​of the VBR tail rudder 5. If you select the operating frequency, connect the tail servo up and adjust the left and right sides of the rudder. If the mechanical neutral point of the rudder is correct, the left and right travel boundary values ​​should If the value is greater than 120, it is necessary to adjust the rudder or tail servo lever, and if the value is greater than 120, it means that the hole on the rudder is too short and less than 80 indicates that the hole on the rudder is too long. The value should be between 80-120, and close to or equal to the best condition.

Second, V-Bar tail rotary wing adjustment

If you are sure that the tail rotor assembly is not problematic in the mechanical structure and that the VBar rudder stroke adjustment is also in line with the requirements of the VBar, the following should be done with the VBar tail rudder adjustment. Its default value is P gain 80, I gain 60, and the tail gyro gain depends on the size of the body have different values, such as 700 about 90-100, 450 about 60-65. Basically most of the helicopter Use the original preset value as long as the tail of the rotating wing of the gyro gain that can have a good effect, while the following is more detailed adjustment.

First perform the following test actions.

1. Shun, reverse, crosswinds.
2. Move left and right side by side
3. high-speed left and right channel
4. high-speed around the channel sharp bend
Before and after the roll.
6. high-speed forward channel with slow spin

If there is a quick pitch or high frequency sound, the tail gyro gain should be reduced. The tail gyro gain adjustment depends on your control mode, controlled by the control or by the VBar channel.

Fast jitter

If the amplitude is small and fast jitter, such as more than three times per second jitter. That means P gain is too high. It is recommended to a five units down, the minimum is not recommended less than 60. If less than 60 still no improvement, should return To the first point, check the mechanical structure, servo travel, etc. If you have improved, then do the bottom of the fifth point of the tail rotor control loop optimization

Slow little jitter

Excessive I gain will result in a slight jitter of the tail rotor, about 1-2 times per second. If this is the case, the I gain is reduced by 5 units at a time.

In addition, the I gain is inversely proportional to the torque preset compensation, so if the I gain is increased, the torque preset compensation is reduced and vice versa, and if the I gain is reduced to 40 still can not solve the problem, And then check the first point to see if the tail servo rudder arm hole is too inside. And mechanical structure and other issues. If improved, then do the next fifth of the tail rotor control loop optimization adjustment.

Third, the tail rudder on the collective pitch compensation adjustment

And pay attention to whether or not the body remains level during the pull-up process. If the rudder is in the process of pulling up or during positive and negative pitch conversions, the tail rotor will be slightly returned to the right. In the picture, "tail rotation wing / torque preset compensation / spiral total distance", once to 3 units as the base, and vice versa, such as the left and then return to that compensation is too much, and to reduce the set value.

Fourth, the tail rudder brake force adjustment

In the Pro rudder setting, stop the gain A, B with the meaning of the left and right values ​​in the control loop. In the Pro rudder setting, stop the gain A, B in the control loop with the meaning of the left and right values. The following are the main rotor is clockwise rotation of the helicopter-based.

Stop gain A: refers to the remote control rudder joystick from the right back to the neutral point of the brake force.
Stop gain B: refers to the remote control rudder joystick from left to neutral point of the brake force.

Fifth, tail rotor control loop optimization

The computer is ready for action

The same into the VBar set the computer screen and connected to the VBar. In the tail of the rotation of the experts in the lower left corner of the options, the control loop "optimization" option tick to the main rotor for the clockwise rotation of the helicopter. Square value is to control the counterclockwise rotation speed, that is, the tail rudder to the left to play; the right value is to control the clockwise rotation speed, that is, the tail rudder to play the original preset value is 30 30.

The left side of the control loop represents the speed at which the rudder of the remote control rudder from the neutral point to the left and then back to the neutral point.
The right value in the control loop represents the speed at which the remote rudder joystick returns from the neutral point to the neutral point.
The greater the value, the smaller the rocker stroke has the greater response.

The tail rotor control loop is optimized for automatic fine adjustment

Take my own practice as an example. After launch, set the tail rudder around the spin in the end several times. Each spin about 3-4 laps and then change the edge. Back two to three times to drop. Then Vbar automatically adjust by The original 30 30 into 38 28. At this time and then lift the test machine, roar. Was originally counterclockwise spin speed is different, and now is very close. Then the channel to try, the left corner of the reaction was significantly more sensitive. Slightly slow. So after I landed, turn the value to 35 31. Then lift the test machine, about the spin speed OK. And the left and right turn feel very close, like ah.

Six, VBar tail rudder sensitivity adjustment and then simplified to JR XG11 as an example

Before the VBar rudder sensitivity of 65 above the calculation formula = 65 + control T.Lock sensitivity / 1.67.

But there is another way to set the gyroscope sensitivity mode to NORMAL so that the signal is not cut to lock / unlock and has a larger signal range can be set because the VBar lock / unlock is from the VBar ( Computer) to adjust, and the remote control is only to the value of the value of different remote control recommendations can be connected to the computer to see the actual value of the value of the prospective.

To JR XG11 is not calculated in 1: 1 Oh, but VBar sensitivity = NORMAL sensitivity x 1.3
The following chart is 54x 1.3 = 70

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