FPV Motor Health Check

Upload a flight log and check every motor for imbalance, vibration, and saturation — find the one about to fail.

Log in to check your motors — free

One free check a month; unlimited with a subscription.

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What the blackbox reveals about your motors

Every motor leaves a trace in flight. Reading it lets you catch the one about to fail before it does:

  • Output imbalance — one corner constantly working harder than its diagonal usually means a prop pitch/damage difference, a weakening motor, or a CG/yaw bias.
  • Vibration at rotation frequency — elevated gyro energy at a motor’s own rotation frequency is the classic signature of an unbalanced prop, a bent shaft, or a worn bearing.
  • Saturation — a motor that frequently maxes out is an underpowered corner: a wrong/damaged prop or motor.

Fix any mechanical issue first; once the hardware is clean, tune to dial in the feel. Already crashed? Run the crash analyzer to find the cause.

Frequently asked questions

How does it find a bad motor?

From your blackbox it reads each motor’s output, RPM telemetry, saturation, and the gyro vibration at each motor’s rotation frequency. A motor that works much harder, saturates often, or vibrates more than the others is flagged — usually a damaged prop, worn bearing, bent shaft, or a weak motor.

What file do I need?

A Betaflight blackbox log (.bbl or .bfl) from a normal flight — ideally with bidirectional DShot (RPM telemetry) on, so per-motor RPM and vibration can be measured.

Is it free?

Logged-in users get one free motor check a month; subscribers get unlimited checks plus tuning and crash analysis.

FPV Motor Health Check — Find the Bad Motor from Your Blackbox