Hi all: Hace a random question on the behavior of a both a 747-200 & A380 from LAX to SYD. I’m fairly new to the community so I apologize if I posted this in the wrong spot but I have a quick question I wanted to ask. I was flying both a A380 and a 747 and both of those aircraft seem to lose airspeed midflight as well as altitude with the aircraft intermittently stalling. The only fix was to keep flaps at 10 during criuise. I wasn’t sure if this is normal procedure. It’s my first time trying this aircraft after flying the 787 and 777. When I retract the flaps, the aircraft seems to lose airspeed, lift and altitude. Any thoughts? I was flying against an 80 not headwind, I’m not sure if that added to the problem. Please educate me, I’m just trying to understand and learn.