Operator action: Return or LAND
During and shortly after transition, the vehicle may lose some altitude, this is generally not more than 5
meters. In extreme cases (high payload, strong wind). This can be up to 8 meters. The vehicle should
recover from this loss quickly, regain and maintain altitude. Some altitude gain or loss may occur when
banking (changing direction). This should not exceed 5 meters.
If the vehicle does not maintain altitude, or if the altitude error exceeds 10m and the vehicle does not recover
from this altitude error an RTL should be commanded. If the vehicle does not adequately perform the RTL
procedure (continues to lose altitude or fails to navigate back) a LAND instruction should be given. After a
LAND instruction is given, and the vehicle is performing a landing in quadcopter mode, the RTL instruction
can be given again to have the vehicle return in quadcopter mode. This should only be attempted when the
vehicle is less than 1km from the takeoff site and more than 50% of the battery capacity is available.
The reason this can occur could be related to weight, balance or a problem with the servos or pusher drive.
A thorough inspection of the vehicle is required. If the problem can not be found and resolved you should
contact Vertical Technologies support.
Failure to track mission path
Operator action: Return or LAND
During the transition the vehicle does not fly in the direction expected:
When the transition phase completes, the vehicle should fly towards its takeoff location or first waypoint. If
the vehicle does not follow its intended path after the transition phase, a RTL should be commanded. If the
vehicle does not adequately perform the RTL procedure (continues to lose altitude or fails to navigate back)
a LAND instruction should be given. After a LAND instruction was given, and the vehicle is commencing a
landing in quadcopter mode, the RTL instruction can be given again to have the vehicle return in quadcopter
mode. This should only be attempted when the vehicle is less than 1km from the takeoff site and more then
70% of the battery capacity is available.
The reason this can occur can be related to a failure of the servo actuation or incorrect mission loaded.
Excessive pitch
Operator action: Increase cruise throttle / Return
The DeltaQuad should cruise at an average pitch angle between 3 and 9 degrees unless a change in
altitude was commanded. If the pitch angle consistently exceeds 12 degrees while the vehicle is not
attempting to climb to a higher altitude the cruise throttle should be increased. Increasing the cruise throttle
can be done by changing the parameter as described in the . This parameter can be
changed during flight. If this does not resolve the problem the flight should be aborted by issuing an RTL
command.
Note: When changing the cruise throttle during flight special care must be taken to monitor the battery level.
Key parameters section
The reason for this could be related to , over weight, too low or a problem
with the fixed wing drive. To resolve this attempt to level the vehicle as described in the sensor calibration
section, verify the weight or increase the cruise throttle. If the problem persists please contact Vertical
Technologies support.
sensor calibration cruise throttle
Battery level and current consumption
Operator action: Return
The battery level percentage indicated in the top bar of the flight screen should be monitored throughout the
flight. the percentage should always be higher than the relative distance the vehicle still has to travel. For
example, if only 50% battery remains, more than 50% of the mission should have been completed. The
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