Free-flight is a term used in aviation and model flying that refers to flying without any restrictions or controls. In this context, it often involves aircraft or model airplanes that are launched and allowed to fly freely, relying on their design and aerodynamics to glide through the air. This type of flying can be seen in competitions where participants aim to achieve the longest flight distance or duration. In the world of model aviation, free-flight models are typically powered by rubber bands, small engines, or even just the wind. Enthusiasts build and test these models, focusing on factors like weight, balance, and wing shape to optimize performance. Free-flight is a popular hobby that encourages creativity and engineering skills among its practitioners.