Think 3D STORMBEE S20, User Manual

Page: 51 / 102

STORMBEE User Manual – Think 3D BVBA
Version N°1.1, last modified 30/09/2018
37
5 Flight actions
5.1 Flight modes
5.1.1 Manual (A-/ATTI-/P-ATTI mode)
NOTE This is the emergency flight mode to which the pilot should switch immediately if
STORMBEE exhibits strange behaviour.
In ATTI-mode, GPS positioning is not used. STORMBEE does not have a Vision Positioning system. The
DJI A3 flight controller is using only its barometer for altitude control and IMU for stabilising the
STORMBEE in attitude (pitch, roll and yaw), but not the horizontal position (drift).
In ATTI-mode, only height limits work and flights cannot go higher than 120 meters (can be set higher
in the DJI GS Pro or DJI GO app). The height limit is automatically lowered to 50 meters if the GPS signal
is of poor quality during flight.
If the Lightbridge 2 remote controller signal is lost and the Home Point (location) has been recorded
successfully while the DJI A3 is still receiving a GPS signal, then the aircraft can automatically return
home.
CAUTION! Even if no wind is present, the STORMBEE will slowly drift away. If wind is present, it
will drift downwind and drift faster.
5.1.2 P-GPS mode (Positioning)
NOTE This is the default flight mode when flying manually or automatically using waypoints.
In P-GPS mode the DJI A3 flight controller uses its GPS, IMU and barometer for position control, both
horizontally and vertically.
P-GPS mode works best when GPS signal is strong. There are three different states of P mode, which
will be automatically selected by the A3 depending on GPS signal strength and Vision Positioning
sensors. However, as STORMBEE does not have a Vision Positioning system, only P-GPS mode is
available in which the aircraft is using GPS for positioning.
5.1.3 Waypoint flight mode (DJI GS Pro)
The “ Waypoint Flight Mission” mode is an intelligent flight mode of DJI running on top of the P-GPS
mode. It allows you to execute a pre-programmed GPS-trajectory for the STORMBEE and set the
desired velocities, heights and headings during each segment of the trajectory. This can only be done
with the DJI GS Pro app on the tablet as described in section 4.2.4
“ Pre-flight actions with DJI GS Pro
app (automated flight) ”.
The DJI Go app is not capable of pre-programming a GPS-trajectory, but it can record a (manual) flight
path, after which the aircraft will fly along the same path repeatedly. This flight path can be saved and
re-applied in the future.
NOTE Think3d advises STORMBEE operators to use the DJI GS Pro app and fly the missions in
automated flight mode, using GPS waypoints, instead of piloted P-GPS. This will result