FAQ

No. The ACE software does not provide a motor direction setting. Motor direction should not be incorrect because the motor uses MR30 connectors, and the three-phase motor connector is keyed to prevent incorrect connection.

The factory ESC throttle range, motor direction, and related functions are fixed in firmware. The throttle range cannot be calibrated on any of the ESCs. The fixed range is 1000 us to 2000 us.

The H1 Pro and H2 flight controllers have a dedicated ESC port. The throttle output range is 1100 to 1900 us PWM. Most related customer issues are caused by an incorrect ESC throttle range setting.

There is no nitro option in the H1 Pro or H2 software. Nitro-powered helicopters require an external engine governor so the engine can be controlled like an electric power system from the flight controller's perspective.

The H1 Pro does not support Chinook helicopters. The H2 does support them.

The H1 Pro does not currently support retracts. The H2 has an expansion port that can be mapped to transmitter channel 9 and used as a landing gear retract output.

When installing landing gear, check whether the BEC has enough power capacity to support the additional power draw from the landing gear.

Most Futaba transmitters are supported, but you must confirm the transmitter channel count and receiver compatibility. The transmitter must have 9 channels or more, and the receiver must have an SBUS port.

No. They do not support analog servos. They only support digital servos.

No. None of the FLYWING flight controllers support flybarred helicopters with ailerons.

No. Helicopters with reversed collective pitch geometry cannot be used with the H1 Pro or H2.

The GPS module and antenna on the ACE flight controller are integrated inside the upper section of the flight controller.

Because ACE is sold as part of a complete ready-to-fly (RTF) model, pilots do not need to modify the GPS location. GPS issues are generally not caused by a loose connector or an aging or damaged GPS module. Most GPS reception issues are caused by tall buildings in the flying area blocking the sky view.

The same CAN GPS can be hot-plugged. However, if you replace it with a different CAN GPS, the CAN ID will be different. The flight controller must be powered off and restarted before it can recognize the new CAN GPS.

Yes. The ELRS protocol is supported.

Before ELRS 4.0, channel 5 defaults to a two-position AUX switch with only on and off states. In the ELRS RF module menu, set it to full-resolution proportional mode at 333 Hz or lower. 100 Hz, 250 Hz, and 333 Hz are all acceptable. Then set it to 16ch Rate/2 half-rate mode to obtain 16 fully proportional channels.

If you are using an ELRS receiver, limit the ELRS receiver output power to 25 mW, and do not exceed 50 mW. Excessive receiver RF power can interfere with GPS performance or reduce GPS power margin.

No. None of the FLYWING flight controllers, including H1 Pro, H2, and ACE, support setting expo and rates on the transmitter.

Do not set it up like a conventional flybarless helicopter in the radio. Keep each channel independent, with linear output and no transmitter-side mixing, expo, or rates.

The H2 uses the H2 Assistant software. The H1 Pro uses the H1 Pro Assistant software.

Note: the H1 Pro and H1 use different setup software. Do not mix them.

There is no factory reset function. Reconfigure the helicopter in the order shown in the software:

1. Set up the transmitter first.
2. Reconfigure the swashplate and tail servo setup on the actual model.
3. Leave the advanced parameters unchanged, and only make sure the throttle percentage is not lower than 75%.
4. Fine-tune the parameters through test flights.

No preset data is available. Use the default parameters. Set the throttle percentage to 75% as a starting point, then adjust it based on actual test-flight results.

Soft start cannot be disabled on the H1 Pro. It can be disabled on the H2.

After disabling it, disconnect and reconnect the software to confirm the setting. During spool-up, there will still be approximately 1 second of takeoff and landing detection, so the helicopter will only lift off about 1 second after the stick is moved.

Set the flight mode channel value to 1300 to enable full manual mode.

In GPS mode, GPS positioning and position hold are active. In ATT mode, the gyro and self-leveling functions still work, but GPS positioning is not active, so the helicopter will drift.

Smart 3D means that when cyclic stick input is below 80%, the helicopter remains in GPS mode. When the input exceeds the threshold, it enters manual mode with collective pitch compensation.

The flight controller automatically adds collective pitch compensation to prevent altitude loss, while allowing roll maneuvers with the right-hand cyclic stick in Mode 2.

Yes. Unlike the H1, when the H1 Pro is in GPS mode and not armed, the swashplate can still respond to transmitter stick input.

After arming and starting the motor, if the main blades are not installed, the swashplate may appear not to move or may move erratically. This is normal.

The compass can be calibrated using either the transmitter or the ACE Assistant software.

If you calibrate it more than twice, it is recommended to power off and restart the helicopter. Calibration requires six orientations. When interference is not severe, the flight controller will usually restart automatically and complete calibration after three or four orientations.

Refer to the official FLYWING YouTube tutorial.

Set the transmitter flight mode switch to the top position, then quickly move it to the bottom position and back to the top position. Repeat this more than three times. Wait a few seconds until the GPS light starts flashing red, indicating that magnetometer calibration mode has been entered.

In GPS mode, after the helicopter has successfully acquired satellites, carry the helicopter around the area. If the flight controller light stays green and does not turn yellow, red, or show any other abnormal status, the site is suitable for flight.

This is normal. The flight controller has blade detection and can detect the difference between the expected model response and the actual attitude.

All FLYWING flight controllers, including H1, H2, and ACE, have this protection mechanism. To start the motor, move the motor start switch while the green or blue LED is flashing.

1. After moving the motor start switch down, check whether throttle channel 3 outputs normally.
2. Check whether throttle channel 3 is reversed.
3. Check whether the rod-end bearing and main shaft are rusted together and unable to move up and down.
4. Check whether the motor pinion is not secured properly, causing drivetrain slippage and insufficient head speed.

The LiPo voltage is low, so the flight controller automatically shuts off the motor. Charge the battery pack. Alternatively, disable the battery detection function, which is the low-battery return-to-home function.

Common causes of **yellow/green flashing**:

**Pack charge below 75%**: If a LiPo pack with less than 75% charge is connected to an ACE helicopter, the flight controller will prevent arming. Charge the battery pack.

**The motor start switch was moved before arming**: This can also cause red/yellow flashing. Arm the helicopter first until the LED changes to flashing green, then move the motor start switch to start the motor normally.

Connect the Assistant software and check whether the pack voltage shown in the upper-right corner of the home page matches the actual voltage. If the difference is greater than 0.4 V, the flight controller must be replaced.

Check whether the software reports any other errors, such as compass or GPS faults.

Common causes of **yellow flashing**:

Confirm that you are in an open outdoor area and wait 5 to 10 minutes. Also consider whether tall buildings in the flight area may be blocking the sky.

Calibrate the compass.

Check the motor start switch. If the switch is already in the start position before the helicopter is powered on, the yellow LED may keep flashing slowly.

No. It will not crash solely because GPS signal is lost.

The helicopter may experience position drift and will no longer be able to hold position, but it will still maintain altitude. After GPS is lost, the helicopter becomes much harder for beginners to control. It becomes very responsive and can move around easily.

Crashes associated with GPS loss are usually caused by hitting an obstacle, such as a tree or building. The helicopter will not enter free fall or stop the blades simply because GPS signal is lost.

1. The STOP switch was pressed by mistake**: During normal flight, the STOP switch may have been pressed accidentally, cutting motor power. Many pilots are too nervous to remember pressing it, or their sleeve may accidentally touch it.
2. Another switch was pressed by mistake**: For example, pressing the manual 3D switch can cause the helicopter to descend rapidly. It is recommended to install a switch guard.
3. The battery was depleted**: A depleted battery during flight can cause a crash.

A helicopter naturally tilts while hovering because of its mechanical design. In addition to counteracting main rotor torque, the tail rotor also pushes the helicopter to the left, so the helicopter tilts to the right when viewed from the tail. Full-size helicopters behave the same way.

If the tilt is abnormal, check the swashplate level and mechanical condition.

Common causes:

1. The main blades are out of balance. Check whether the blade weight difference is within 0.1 g.
2. Mechanical issues, such as loose screws, loose frame plates, or main shaft problems.
3. Cyclic gain is too high. Reduce pitch and roll gain.
4. Damaged main blades.

**Recommendation**: Do not take off from smooth surfaces, such as wood boards, concrete, or stone. Starting from dirt or grass is recommended.

1. Calibrate the compass. If that does not help, continue to step 2.
2. Check whether there is too much friction between the swashplate linkages and ball links, causing mechanical binding.
3. Check whether the bearings inside the main blade grips are damaged or binding. Also check whether the rod-end ball links are rusted or binding.
4. One of the three swashplate servos may be damaged or worn. Troubleshoot carefully and replace the affected servo if needed.

1. First check whether the thrust bearings inside the tail blade grips are installed fully and in the correct order.
2. Increasing both head speed and tail gyro gain proportionally may also help reduce tail wag.
3. If the above steps do not solve the issue, check whether the servo voltage meets the required specification. For example, using 6 V operating voltage with an 8.4 V servo can make the servo weak and underpowered.

The head speed or collective pitch is too low, resulting in insufficient cyclic authority and making the helicopter uncontrollable.

Set the throttle/head speed value to at least 75%. After correctly zeroing the pitch gauge, make sure the total collective pitch range is at least +/-12 degrees.

Low-battery return-to-home has been triggered. You can toggle the return-to-home switch on and then off again to cancel automatic return-to-home and land manually.

Pay close attention to pack voltage at this point. If the pack is too low, the helicopter may crash.

No. It cannot be disabled.

Low-battery return-to-home has been triggered.

When it is triggered for the first time, the pilot can cancel this return-to-home event by switching the return-to-home switch to return-to-home, then switching it back to return-to-home off. All indicator LEDs will flash yellow/green rapidly. In attitude mode, they will flash yellow/blue rapidly.

The second trigger cannot be canceled. It is recommended to take off from an open area to avoid hitting obstacles during return-to-home.

When using a 4S LiPo pack:

**Arming prohibited:**

When pack voltage is below 15.2 V, the helicopter is not allowed to arm.

**Level 1 warning:**

When pack voltage is below 14.77 V, the helicopter triggers a level 1 battery warning. All helicopter indicator LEDs will slowly flash purple.

When pack voltage is below 14.73 V, the helicopter triggers level 1 low-battery return-to-home. All helicopter indicator LEDs will turn solid purple, and the first return-to-home event will be triggered. The pilot can cancel this return-to-home event by switching the return-to-home switch to return-to-home, then switching it back to return-to-home off. All indicator LEDs will flash yellow/green rapidly. In attitude mode, they will flash yellow/blue rapidly.

**Level 2 warning:**

When pack voltage is below 14.6 V, the helicopter triggers a level 2 battery warning. All helicopter indicator LEDs will return to slowly flashing purple.

When pack voltage is below 14.53 V, the helicopter triggers level 2 low-battery return-to-home. All helicopter indicator LEDs will turn solid purple, and the second return-to-home event will be forced. The pilot cannot cancel it. It will continue until the helicopter returns and lands.