Think 3D STORMBEE S20, User Manual

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STORMBEE User Manual – Think 3D BVBA
Version N°1.1, last modified 30/09/2018
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in the most accurate flight path and stabilisation for STORMBEE. Steady accurate flight
trajectories result in accurate GNSS positioning and high quality point cloud data after
post-processing. For both automated and piloted manual flight, try to program/fly as
much straight lines as possible. Refrain from adjusting STORMBEE
’s heading during
those straight lines, as then the GNSS positioning is most precise and the resulting laser
scan point cloud will be most accurate.
WARNING!! SAFETY FIRST!! DO NOT solely rely on the FPV screen to estimate distances between
STORMBEE and obstacles as the camera has only a limited field of view and judging
distances from a 2D screen is very difficult and inaccurate. Watch STORMBEE at all
times during the flight! The pilot or one of his/her observers should always be within
Visual Line of Sight (VLOS). The pilot should always keep his/her left-hand index finger
on the flight mode switch on top of the DJI Lightbridge 2 to be able to instantly switch
to ATTI-mode if something goes wrong (without having to first search/feel for the
button).
WARNING!! The pilot (and/or crew) should continuously re-position him-/herself during the flight
to keep STORMBEE within VLOS with free air between STORMBEE and its nearest
obstacles. It is almost impossible to perceive depth at distances of 50m or more. If
STORMBEE is flying on a straight line between you and a tree/obstacle further on, you
cannot accurately estimate how close STORMBEE is to that tree/obstacle. Re-position
yourself at a(n) (right) angle of the path between STORMBEE and that obstacle. That
way you will see free room (air) between them and can judge the distance between
them more accurately. Discuss the pilot’s movements before the flight and assure the
path on the ground is free from obstacles over which the pilot can stumble/trip.
5.1.4 Return-to-Home (RTH)
The DJI A3 flight controller is quite aggressive when RTH is active and STORMBEE will abruptly and
aggressively execute its RTH manoeuvres. This behaviour is normal. The reason for this is that this is a
failsafe (emergency) mode and as such it is assumed you want STORMBEE on the ground as fast as
possible.
Failsafe RTH:
The failsafe action of the DJI A3 controller, when the communication between transmitter and RPA
(including video relay signal if DJI Lightbridge 2 used) is lost (for more than 3 seconds), differs between
manual flight and automated flight. If the RPA is flying automatically by means of GPS waypoints,
depending on the GS pro app settings, the RPA will either perform a RTH manoeuvre immediately or
continue its mission. In the latter case, when the communication is not restored by the end of that
automated mission, the RPA will then still switch to RTH and land. If the RPA is controlled manually at
the time of communication loss, the RPA will switch to RTH failsafe immediately. RTH entails that
STORMBEE will climb to a pilot pre-programmed height, set higher than any obstacle in the vicinity,
and then fly home in a direct line, after which it will land at a pre-programmed location. This location
is usually the location at which STORMBEE has powered up its motors (take-off location) but can also
be re-programmed by the pilot during flight.
The aircraft cannot execute RTH failsafe if the DJI A3 LED is slowly blinking yellow or the GPS does not
work.