Skip to main content

Flight Log Analysis

Understanding your logs is the key to maximizing range and catching issues early.

Key Metrics to Monitor

After every flight, review these metrics in Mission Planner or QGroundControl. Consistent values within these ranges indicate a healthy, well-tuned aircraft.

Performance Targets

Cruise Current5–7A (target)
Wh/km (with VTOL)< 2.5 Wh/km
Wh/km (cruise only)< 1.8 Wh/km
Hover Voltage (min)12.8V under load
Transition Current Spike< 25A, < 5 seconds
Cruise Airspeed54–60 km/h optimal

What Good Logs Look Like

A well-performing Stork will show these characteristics in the log data. Deviations may indicate calibration issues, wind conditions, or mechanical problems.

Health Indicators

Altitude HoldSteady, < 2m deviation in AUTO
Compass HealthNo EKF warnings or yaw drift
GPSHDOP < 1.5, 10+ satellites
Vibration< 15 m/s² on all axes
Battery Sag< 0.5V from resting at cruise load

How to Access Logs

  • 1. Connect to the flight controller via USB or telemetry radio
  • 2. In Mission Planner: DataFlash Logs > Download. In QGC: Analyze > Log Download.
  • 3. Open the .bin log file in Mission Planner or use UAV Log Viewer (online)
  • 4. Graph CURR.Amps, BAT.Volt, GPS.Spd, and CTUN.Alt for a quick health check

Need help reading your logs?

Send us your flight logs and we will review them with you.

Contact Support