Glider is a type of quiet transportation that uses the natural lift of air to stay in the air without the need for an engine. It is a popular form of recreational aviation, and is also used for environmental monitoring and aerial photography. Gliders are typically constructed from lightweight materials such as fiberglass or aluminum, and have wings that are designed to maximize lift. Gliders can be flown solo or with a passenger, and can reach speeds of up to 200 mph.