Failsafe is what happens when the RC link dies mid-flight. Without correct configuration, a link-loss event sends the quad flying away at full throttle or drops it like a stone. Neither is good. Two-Stage Failsafe Betaflight uses a two-stage system: flowchart TD A([RC signal<br/>lost]) --> B{Stage 1<br/>guard time} B …

LiPo batteries are the most maintenance-sensitive component in an FPV build. Misuse kills them fast or causes fires. Cell Voltage State Voltage per cell Fully charged 4.20 V Nominal 3.70 V Storage 3.80–3.85 V Low cutoff 3.50 V Dead / damaged < 3.30 V Never discharge below 3.5 V per cell under load. Set your FC …

A methodical pre-flight check prevents the most common crash causes: wrong motor direction, loose props, dead receiver link, and arming flags. Five minutes before every session, not just the first flight of a build. Full Checklist 1 — Battery and Power Cell voltages balanced (within 0.05V of each other under no load) …