A: Pull both joysticks of the transmitter to outside corners for at least 3 seconds. When the green indicator on Byme-A flashes once means calibration is done. It's strongly advised to calibrate the aircraft with a certain angle (approx. 20°), which is easier to keep flight altitude with Angle/Stabilize Mode. Attitude calibration only needs to be done once and Byme-A will record.

A: 1) Make sure the biding is done and the signal output of receiver is SBUS or PPM. Please refer to the user manual for the detailed steps.

2) Level the aircraft on the ground and power it on and the transmitter. The aircraft will do auto checking, which takes about 1 minute. When it's done with success, a music tone from ESC will be heard. Then try operating the transmitter to see if servos move.

A: Make sure if the motor is locked. The default lock to motor is CH7 of transmitter. When the CH7 switch is toggled at the up position, the lock is off and the motor will move when the throttle is toggled. When the CH7 switch is toggled at the down position, the lock is on then the motor won't move even the throttle is toggled.

A: 1) Check if Byme-D is well fixed.

2) Check if the flight mode is non-manual one. Because when at Angle/Rate Mode, gyro assists to stabilize. If the aircraft is not well leveled, ailerons/servos will automatically adjust certain angles to balance.

3) Make sure the Byme-D head(arrow) points to the aircraft head. Byme-A should be fixed horizontally on the fuselage instead of vertically.

4) Recalibrate the aircraft: Level the aircraft and switch the flight mode as Manual. Pull both joysticks of the transmitter to outside corners for 3-5s until the green indicator on Byme-D flashes once.

A: Servo phases can be set by pressing the button at front of flight controller as the following steps: Short press the button once to set the phase of Channel 1 with led1 on/off; short press the button twice to set the phase of Channel 2 with led2 on/off.

A: There are totally 3 modes:

Angle/Stabilize - Gyro assists to balance with maximum roll angle of 70° and pitch angle of 45°. The aircraft will level automatically when joystick is released.

Rate/Gyro - Gyro assists to balance but aircraft won't level when joystick is released.

Manual. Pilots need to control manually without gyro assistance.

A: Byme-D flight controller is specially for delta wing with three channels. Therefore, there's signal output from Channel 1 to 3. But no output for Channel 4.

A: As gyro doesn't function at Manual Mode, all channels/servos work correctly to the transmitter joysticks means the transmitter functions well. But if they are reversed when other flight modes are changed to, phases on flight controller also need to be set by pressing the button at front of flight controller, following below steps: Short press the button once to set the phase of Channel 1 with led1 on/off; short press the button twice to set the phase of Channel 2 with led2 on/off.

A: It's because of the Manual Mode. When calibrating flight controller phases, please switch to Angle Mode.

A: Does not. The Byme-D flight controller can not be used with  V-tail planes.

A: Connect the flight controller to the receiver. Push the joystick of the transmitter and view the servo display in the transmitter at the same time. If there is a mix control of channel 1 and channel 2, the flight controller is Byme-D. If there is no mix control of channel 1 and channel 2, the flight controller is Byme-A.

A: Byme-D support both PPM and SBUS signal input, so please check if your receiver supports PPM or SBUS signal output. If the receiver does not support PPM or SBUS signal, you need to purchase an additional converter to PPM or SBUS signal.

A: If the ESC does not have a BEC, an external BEC module is required to reduce the voltage to 5V. Because the input voltage of some receivers cannot be higher than 5V, and the input voltage of Byme-D cannot be higher than 6V.

A: The wrong installation direction and position of Byme-D will lead to inaccurate correction of the flight controller, and the flight effect will be affected.

A:  For Byme-D, channel 5 (asked set up a three-way switch to switch the flight mode) is used to switch among 3 flight modes, and channel 7 is used to lock/unlock the motor. Therefore, only transmitter with 7 channels or more is available.

A: You cannot set any mixing function in the transmitter when Byme-D is mounted on the aircraft. Because there is already the mixing function in Byme-D.  The mix control will automatically take effects according to the flight mode of the aircraft. If the mixing function is set in the transmitter, there will be conflicts such as the situation that only one aileron swings when you move the joystick.

A: Push the throttle stick to see if there is output of throttle channel. If there is output of throttle channel when you push the stick, you do not need to calibrate the ESC. If there is no output, you need to calibrate the ESC. For the specific calibration method, please refer to the instruction manual of the ESC.

A: Turn the aircraft around by hand. (Do not operate the transmitter at this time.) No movement of the control surface means it is manual mode now.

A: First, make sure to set the direction of the channel as below:

Throttle channel-- Reversed, other channels -- Normal.

If you set the direction of the channel as above, but the attitude calibration cannot be finished by pushing the left stick (left and down) and the right stick (right and down), please enter the menu of the transmitter to set the direction of the channel. The direction of the throttle channel still remains reversed. But for other channels, please try the following 3 combinations to set the channel direction and then calibrate the attitude by pushing the left stick (left and down) and the right stick (right and down):

Combination 1: Channel 1- Normal, Channel 2- Reversed

Combination 2: Channel 1- Reversed, Channel 2- Normal

Combination 3: Channel 1- Reversed, Channel 2- Reversed

When the attitude calibration can be done by pushing the left stick (left and down) and the right stick (right and down) with any one of the above combinations of the channel direction, save it and do not make any modifications. After the attitude calibration is finished, please check the servo direction next.

A: NO.