Parachute

Detailed description of the flight termination recovery equipment

The parachute is a device meant to safely terminate a flight in an emergency that impedes the return to the launch location, safe landing, or flight continuance.

Parachute deployer 3D schematic drawing

Parachute Arming Conditions

The flight controller sends a parachute arming command when the aircraft is armed	Parachute armed
Flight altitude increased 10m since the aircraft was turned on	Parachute armed

Ignition Conditions

The parachute must be armed and one of the conditions below must be met for ignition.

Autopilot command	Autopilot detects fault that requires flight termination and triggers the parachute	Parachute is triggered, motors disabled
Manual (user) command	User detects fault that requires flight termination and triggers the parachute	Parachute is triggered, motors disabled
Dead-man failsafe	If heartbeat from autopilot is not received and (Posture exceeds threshold, or freefall is detected for more than threshold time, or falling speed exceeds 12m/s)	Parachute is triggered, motors disabled

Parachute troubleshooting

Indicator light	Meaning	Remarks
Alternately flashing red and green	Parachute system initialization	Paracute just connected to power and performing initialization process
Constant red light	Parachute is functioning with external power supply	Parachute is powered by the aircraft's battery
Flashing red light	Parachute is functioning with internal power supply	Parachute is using internal battery, this state persists for 30 seconds aircraft's battery is disconnected
Constant green light	Parachute failure	Parachute internal battery too low; replace battery