Pre-flight checklist

Your WingtraOne flight-prep guide according to the WingtraPilot preflight checklist.

The checklist differs slightly depending on the camera you are flying with. Click here for RedEdge specific preflight checks.

Screenshot_20191015-112111

As the operator, you have to go through the pre-flight checklist within WingtraPilot before you can start the flight. If any of the preflight checks fail (e.g., sensor failure), the respective pre-flight check turns red and starting the flight is not possible. Below you will find an explanation for every checkpoint in the preflight checklist and troubleshooting advice if a check fails.

1. Is your ground clearance outside of take-off/landing at least 40 meters?

This point in the checklist is an automated test. It facilitates flight planning with safe altitudes for you. As soon as you have added a home location and added a flight area, the flight altitudes will be automatically checked to guarantee the flight path has at least the defined ground clearance related to the terrain elevation data. To modify the minimum ground clearance parameter, check the Safety parameters box on the right side. For a more detailed description, check out the Advanced flight planning chapter.

Note: This preflight check is only available if elevation data is enabled. Check WingtraPilot settings to activate the usage of elevation data.

2. Hardware: Is your distance sensor clean? Are your propellers in-tact and well attached? Is the camera lid removed?

Check if the distance sensor is dusty or is blocked by anything (snow, tape, etc.). The distance sensor is located at the tail of the WingtraOne, next to the middle stand. If it is not clean or if you are not sure if it is clean, take the time to clean it with a clean cloth.

Visually check that propellers are not damaged and are well attached. Try by hand to unscrew the propeller: hold the motor with one hand and the propeller with the other hand and try to open it— the red propeller has a normal right-handed thread, the green propeller has a left-handed thread. If the propeller unscrews by hand, tighten the nut with the torx or hex-wrench tool as much as you can. See the maintenance chapter for how to replace a propeller if damaged.

WhatsApp Image 2019-10-18 at 13.49.23 (3)

Remove the camera protection lid. Put it in the pilot box right away, as it is easy to lose.

Confirm by clicking the checkpoint in the checklist. Do not fly if any part of WingtraOne is damaged.

3. Connect telemetry link to tablet and power on WingtraOne

This point in the checklist is an automated test. Connect the telemetry to the tablet to the right of the home button. WingtraPilot automatically connects to WingtraOne as soon as the telemetry is connected to the tablet and WingtraOne is powered on. If an automatic connection can not be established, you can manually connect in the Settings tab by clicking on the "Telemetry" button on the left side. On the bottom, click on "Add." Select type "Serial" and baud rate "57600" and click "ok." If you still cannot connect, repower and make sure that you have attached the telemetry and powered on WingtraOne.

4. Check battery voltage

This is an automated test. WingtraPilot checks whether the battery voltage is above 30V. If the voltage is below 30V, take-off is prevented and you have to switch batteries. In the following further battery failure cases, WingtraOne will refuse take-off when trying to start the flight:

  • Battery too hot (>40°C (>104°F))
  • Battery too cold (<10°C (<50°F))
  • Batteries are not charged evenly

5. Check even take-off position

This is an automated test. WingtraPilot checks whether WingtraOne is standing on even ground. Move WingtraOne if the check is red. If WingtraOne is level and the check stays red, re-power WingtraOne. The maximal slope that is accepted is 10 degrees (17.6%). 

In addition to an even take-off location, make sure that the terrain is not damp and muddy causing the middle stand or the drone to get stuck, which can cause tipping while taking off.

6. Turn on the remote control (RC)

Switch on the RC via the On/Off button in the middle of the unit. After switching it on, it automatically connects to WingtraOne. You can see the RC battery charge and the connection signal strength on the top left of the RC screen.

daljinski

This check is not yet automated, confirm by clicking the checkpoint in the checklist.

7. Check GPS signals

This is an automated test. Depending on the weather and the location, it can happen that your WingtraOne does not receive GPS lock for several minutes. If GPS lock cannot be established after more than five minutes, try to re-power WingtraOne. If you still fail to get reception, submit a support request.

8. Make WingtraOne ready-to-fly

 

IMG_4141

You enable WingtraOne to fly by clicking on checkpoint eight. There will be a confirmation sound. When WingtraOne enters the ready-to-fly state, it runs a routine that checks the functionality of both flaps by moving them back and forth, ending in a steady flap deflection. This checkpoint will automatically turn green as soon as the ready-to-fly state is reached.

9. Check startup flap movement

After making WingtraOne ready-to-fly, the flaps perform a startup routine (see video above). Check if it is run correctly and confirm by pressing this checkpoint. After the routine, one flap stays deflected 25 degrees.

DO NOT FLY if the routine does not run properly (e.g. one flap is not moving at all) and contact Wingtra Support.

10. Camera readiness

This check will test the camera connectivity as well as the ability of the SD card to store the image and flight data. Click the related check item, and WingtraOne will try to write data into the camera during the test process. The checkpoint will turn orange, indicating that the camera test process is ongoing. Wait for it to finish successfully, indicated by the light turning green. In case the checkpoint stays orange for more than one minute, click the check again, and the process will initialize.

11. Calibrate airspeed

Place-Pitot

 

Take the pitot cover out of the pilot box and cover the pitot tube with it. Start airspeed calibration by clicking on the checkpoint in the checklist. The automated calibration is finished when you hear the beep. Remove the pitot cover after successful calibration! If airspeed calibration fails, you can restart it by clicking onto the respective checkpoint again.

12. Review flight plan and upload to WingtraOne

After you have planned your flight, make sure you always review it by closing the checklist and checking the parameters and the planned flight path. Make sure WingtraOne will not collide with any obstacles. The altitude graph allows you to review flight altitudes properly. Note: having terrain data enabled (see Check 1) helps to set flight altitudes correctly. Be extra careful with the transition direction and altitude as well as the loiter circle altitude.

Click on this checkpoint in the pre-flight checklist to upload the flight plan to WingtraOne. WingtraPilot saves the flight plan automatically when you upload it by clicking on the checkpoint. In case you make any changes after uploading the flight plan, WingtraPilot will ask you to upload it again, which can be done by pressing the checkpoint again. If GPS position drifts more than 2 meters between flight plan upload and take-off, the check turns back to white and you have to upload again.

At the same time, further flight plan sanity checks are performed, and a warning is issued if they are not fulfilled:

  • Infeasible flight plan: in case your first flight plan item after take-off or your last flight plan item before landing lies lower than transition altitude, your flight plan will be rejected
    • WingtraPilot will give you the option to automatically insert a loiter waypoint at the respective location; it is recommended to insert the waypoint and manually adjust it (move it to a safe location and adjust waypoint entry/exit altitude to a safe value)
  • WingtraOne checks camera SD card storage is too low to store the calculated number of images for the uploaded flight plan. If this is the case, clear more space on the SD card to make sure all images are saved. If you ignore the warning and continue the mission upload, be aware that you might miss some images towards the end of the mission
    • Safe transition altitude checks if the minimum ground clearance for take-off and land is satisfied. In case you know that the transition altitude you set is safe you can continue as planned; we recommend to accept the suggest transition altitude by clicking "Yes" during this check
      • Geofence violation: both the horizontal geofence radius and the geofence altitude are checked for compatibility with the defined mission. If required, you can increase the geofence parameter in the safety box on the right

        13. Check that there are no people within five meters around the plane and that the environmental conditions and airspace are suitable to fly

        Check if the environmental conditions are suitable to fly. Also check that your flight does not violate laws. Make sure no people are close to WingtraOne. In case of wind, we advise you to be more than five meters away from WingtraOne during take-off and landing. Furthermore, be aware that GPS is less accurate in the case of surrounding tall objects (e.g., buildings, trees). This can lead to drift of WingtraOne and an inaccurate landing. Therefore, keep more distance from tall objects. Confirm by pressing this checkpoint in the checklist.

        14. Complete all previous steps and fly WingtraOne

        To start the flight, click on "Start flight" and move the slider left to right as shown in the images below. The ready-to-fly button will turn solid green (-------) once WingtraOne starts flying.

        WiP_FlightPlan_StartFlight

         

        WiP_FlightPlan_SlideToStart

         

        Motor pre-flight check

        Before starting the flight, there is an automatic check that spins the motors separately (see video below) to ensure that both of them function properly and that they both draw the same amount of current. In case this check fails, the take-off will be prevented. In such a case, check our list of errors for instructions on how to react. 

        IMG_4143