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2.4 Emergency Procedures
2.4.0 Return to Home Function (RTH)
The Inspire 1 drone has a failsafe that should safely return the drone to either a static Home
point (Usually take off/ Landing zone) or a Dynamic Home point (Usually the remote
controller) when triggered.
It will enter RTH when the battery hits a predetermined charge level, when a loss of
transmitter signal occurs or when the RTH button on the controller is pressed.
More information about the exact behaviour of the drone during RTH can be found in
APPENDIX G – INSPIRE 1_USER MANUAL.
2.4.1 Loss of Power to Engine
UAS will be required to make an emergency landing or controlled ditch. Spotters and/ or
photographer can aid in identifying appropriate emergency landing areas (if the USAS is not
capable of reaching the intended landing or emergency landing areas). They can also help
alert any public to the situation. If control is lost and cannot be regained the PIC will call the
emergency code which is “Brace, Brace”. See emergency checklist.
2.4.2 Aircraft Battery Failure
If the aircraft battery fails the PIC will continue control inputs until the aircraft comes in to
contact with the ground in an attempt to regain power and to attempt to pilot the UAS in to a
location that is safe and secure for an uncontrolled landing. The PIC will call the emergency
code which is “Brace, Brace”. The spotter and other members of the crew will alert people
to the problem and try to ensure nobody is near the possible location of the emergency
landing.
Battery failure often be anticipated through the use of battery logs to identify battery charge
or over use. The Inspire system provides a ‘battery remaining’ percentage as well as
voltage information. The pilot should monitor battery levels on a minute by minute basis and
this should alert them to potential problems. On reaching a battery charge of 30% the PIC
will immediately return the UAV to it’s take off/ landing site.
2.4.3 Transmitter Failure
As soon as signal to the transmitter is lost the UAS will return to land at the landing/take off
area automatically.
2.4.4 Loss of Control Frequency
The flight controllers auto-landing system will automatically use the pre-set GPS co-
ordinates to return to land at the landing/take off area. PIC will cycle power to control unit to
try and regain manual control.
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