Plain English Meaning

When you're already in a steep turn, the airplane wants to keep rolling into an even steeper turn on its own. You have to actively hold the bank where you want it, or even use opposite aileron, to stop it from getting steeper.

Full Definition

The tendency of an airplane in a steep turn to continue rolling into a steeper bank without further control input by the pilot. It occurs because, in a turn, the outer wing travels along a larger radius than the inner wing and therefore moves faster through the air, producing more lift on the outer wing and rolling the airplane further into the bank.

Context Anchor

Encountered during steep turn training, especially when learning to hold a constant bank angle without letting the turn tighten.