You are correct. Nearly all aircraft are structurally capable of withstanding 2g maneuvers[1]. This doesn't automatically imply sustained flight, as the induced

You are correct. Nearly all aircraft are structurally capable of withstanding 2g maneuvers[1]. This doesn't automatically imply sustained flight, as the induced drag from the high angle of attack may eventually overwhelm a marginal powerplant, but pretty much any aerobatic, commercial, or military craft should be perfectly capable of flight. The density increase will increase lift, yes, but also drag which is the main enemy. Wings are more efficient at lower angles of attack, so that will improve. The other types of drag will mostly cancel out. [1]https://en.wikipedia.org/wiki/Load_factor_(aeronautics)#Design_standards https://en.wikipedia.org/wiki/Load_factor_(aeronautics)#Desi...