Flight modes and in-flight interactions

Learn about the different flight modes and options to interact with a WingtraOne flight.

WingtraOne generally flies in either hover or cruise. Hover implies a vertical position of the drone for take-off and landing. In cruise, the drone is positioned horizontally for forward-flight, in which WingtraOne flies like a fixed-wing aircraft.

To execute an entire flight plan and incorporate transitions between hover and cruise, WingtraOne flies according to the following three main flight modes:

Auto mode

This is the normal mode where WingtraOne flies the planned flight autonomously from take-off to landing. After you command the take-off on the tablet, WingtraOne performs a motor check, where both motors spin up separately. After four seconds, WingtraOne rises vertically to a pre-set transition altitude in hover mode. While ascending, WingtraOne orients itself to ensure the front side faces the transition direction.

After transition, WingtraOne flies to the loiter circle, where it rises to the mission altitude. After completing the planned flight area(s), WingtraOne flies back to the loiter circle to fly down to transition altitude. After a back transition, WingtraOne first hovers horizontally to the home position and then starts descending. Before initiating the descent, the WingtraOne turns its back side (Wingtra logo) towards the wind to achieve better gust response and a smaller tilt angle for the touchdown. WingtraOne descends horizontally at a rate of 1.5 - 2 m/s, depending on the wind speed. When the wind speed is below 5 m/s the descent speed is 2 m/s, while when the wind speed is above 5 m/s, the descent speed is 1.5 m/s. When it is 3.5 m (11.5 ft) above ground, WingtraOne slows down even more and lands automatically by shutting off the motors 0.25 m (.8 ft) above ground.

Possible interactions with remote control (RC)

The following table summarizes your options to interact with the drone during flight, in order to switch between the flight modes and orientations. Make sure to observe WingtraOne, and be prepared to interact, especially during the landing. You can take all the described actions from the RC by pressing the respective buttons

Return to Home The plane flies back autonomously, performs the planned landing procedure and lands.
Assisted mode Gives the pilot authority via the RC. Engage only if you know how to fly the WingtraOne!
Transition (only works in Assisted Mode) Lets WingtraOne transition between hover and cruise.

Possible interactions with in-app controls

When the in-app controls are enabled all the possible actions to interact with the drone are taken from the tablet by pressing the highlighted buttons.

in-app_interactions

The following table describes the actions of each button taking them from the left to the right.

Start or Continue flight Start the flight or continue after pausing or manually RTH is triggered.
Pause and Loiter Pause the flight in cruise and sets the WingtraOne in a loiter circle.
Return to Home The drone flies back autonomously, performs the planned landing procedure and lands.
Emergency shut-off Kills all motors and spiral down.

Emergency shut-off

The emergency shut-off is a method of last resort used only in critical situations, because once activated there is no going back. The WingtraOne will cut power to both motors and activate one of the elevons to deflect at a high angle. This will cause a rapid descent with a tight spiral, which will crash land the drone. There is a high chance the drone will not be able to recover from an emergency landing. There are some extreme situations in which you might resort to using the emergency shut-off to minimize risk, as follows:

  • Prevent a motor burnout in the event of a tip over on the ground
  • Failure of a single motor or part of the wing is damage— stopping the remaining motor will ensure the WingtraOne does not deviate into an unwanted direction
  • A manned aircraft is approaching the WingtraOne at a very high speed—stopping the motor will prevent the WingtraOne from crashing into the manned aircraft and prevent any injury
  • WingtraOne is very close to crashing into a building due to planning mistake or hardware failure— stopping the motor will prevent the WingtraOne from crashing into the building with the motor spinning and reduce the risk of injury

The emergency shut-off can only be triggered from the tablet by clicking on the respective button and moving the slider from the left to the right as shown in the images below.

THERE IS NO WAY TO REGAIN CONTROL ON EMERGENCY STOP!

Emergency button triggered from the tablet

Screenshot_20200331-114558

Return-to-home (RTH)

If RTH is engaged, WingtraOne flies back to the home point and lands autonomously. For more details, see the Return-to-home chapter.

Assisted mode (with RC only)

You can fly WingtraOne manually in assisted mode. For a detailed description of how to fly with the remote control (RC), see the assisted mode chapter.

Assisted-transition (with RC only)

From cruise flight mode you can shift to hover regime any time by pressing the assisted button and then the transition button on the remote control. When assisted-transition is triggered, WingtraOne will immediately change into its hover flight mode and stabilize itself in air. Example situations when you should consider such a maneuver are:

  • Unplanned approach of an object, e.g. helicopter, bird, etc.
  • WingtraOne behaves abnormally or looks unstable in the air
  • You simply need time to think about what the WingtraOne should do next

After you manage to get the WingtraOne into a safe situation, you can trigger RTH. The WingtraOne will then bring itself back to the home point and land safely autonomously. Note that once you enter assisted mode you can not resume the mission again until you return to home and re-power.

Pause and resume (with in-app controls only)

Users not using the remote control, can pause the mission in cruise by sending WingtraOne into loiter circle. Example situations that this should be considered are:

  • A helicopter or another drone can enter the airspace
  • Birds might fly too close
  • You become unsure if the full flight has been planned safely and want to review it while it's in progress

The data collection can be resumed after Pause or RTH. For more details, see the Pause and Resume article.