Plane 4.1 Became unstable on Auto - Plane 4.1 - ArduPilot Discourse

Plane 4.1.7 Transition issues - dangerous oscillations - Plane 4.1

Hand launch crash repeatedly, - Plane 4.1 - ArduPilot Discourse

Copter Tailsitters - Development Team - ArduPilot Discourse

AUTOTUNE resulted in twitchy control surfaces - Plane 4.1

Arduplane 4.1.6 Auto-Takeoff crash investigation - ArduPlane

Fighter VTOL 4+1 fixed wing - VTOL Plane - ArduPilot Discourse

Advance mission planning Issue - Plane 4.2 - ArduPilot Discourse

EKF inconsistent (can cause crash!) - Copter 4.1 - ArduPilot Discourse

Autotune issue? - Plane 4.1 - ArduPilot Discourse