An aircraft must be loaded and operated in such a way that the center of gravity (CG) stays within the approved limits during all phases of flight. This is done to ensure... - SPL

Question id 215 - Flight Performance and Planning - SPL - Sailplane Pilot License

That the aircraft does not exceed the maximum permissible airspeed during a descent

Both stability and controllability of the aircraft.

That the aircraft does not tip over on its tail while it is being loaded.

That the aircraft does not stall.