FlightGuardian is envisioned as a future aircraft-health and mission-awareness system derived from Kyte X4 research. Its principle: monitoring is not enough. Monitoring should change what the aircraft is willing to do.
Spectrum tells you what's rotating and how badly.
Command vs actual. Response time. Overshoot.
Instant and integrated. Stall detection.
Sag under load. Recovery. Cell balance.
Motor, ESC, pack. Trend more than absolute.
Impedance behaviour · state-of-health markers.
Cross-check. When one sensor lies, the others notice.
Model says X. Aircraft did Y. Y − X is a diagnostic.
FlightGuardian is not a today-technology. It grows out of the residual-analysis work planned in Kyte X4. To understand where it comes from, start there.