A chandelle is like doing a big pretend bird turn when you're flying in an airplane. It's when the pilot makes the plane go up and turn at the same time, so the plane goes in a big circle shape in the sky. Imagine you're in a swing at a park and you swing really high and start spinning around while still going up - that's what a chandelle is like for an airplane. It's a cool trick that pilots can do to show off how skilled they are at flying!