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10 The Fail Safes
10.1 Low power failsafe
10.2 Loss of flight control failsafe
10.3 Conditions that may trigger a failsafe
When the aircraft battery is low, there is likely insufficient power to support the return of the aircraft.
Please land the aircraft immediately, otherwise the aircraft will fall and cause damage to the aircraft and
surrounding objects. To prevent this, the aircraft flight control will use flight information to determine
whether to perform a Return to Home or to land immediately.
When the flight control connection between the aircraft and transmitter is lost, the aircraft will automatical-
ly land or return to where the remote control/transmitter was last located and land there. This can
drastically reduce the possibility of the aircraft crashing or being lost.
Return Home point/Takeoff point: When the aircraft and transmitter have gained 6 or more satellites in
GPS Hold mode, the failsafe “home” point will be recorded as the takeoff point.
1) Transmitter is powered off.
2) The flight distance exceeds the remote control’s signal transmission range.
3) There is an obstacle between the remote control and aircraft.
4) The flight control or transmitter signal is interrupted by strong external electronic interference.
-To ensure the successful return of the aircraft if it loses flight control connection, users must confirm
that the aircraft has enough GPS satellites to fly safely in GPS mode. Users must also be certain that
the flight environment is clear enough for an emergency return and landing.
-If the aircraft's GPS satellites drop below 6 for more than 20 seconds while the X4 is returning to
Home Point, the aircraft will automatically descend.
-The X4 cannot avoid obstacles automatically while in Failsafe mode. Users may set the Return to
Home height to avoid running the aircraft into obstructions.
