How does glider works without propulsion #glider #acrobatics

Gliders are designed to have long wings and to be very light in weight. This is so the wings can generate big amounts of lift to hold a very light glider in the air. A glider will soar sightly nose down when airborne, and gradually drift back down to the ground – like a thrown paper airplane.
There are various types of gliders that can glider for longer than others. This depends on wing structure, weight and weather conditions. Dual seat training gliders typically have a glide ratio of 25:1 (you’ll lose 1 foot of height for every 25 feet travelled forward). More high performance gliders can have a glide ratio of 60:1 – wow!!
According to Wikipedia a glider is a fixed-wing aircraft that is supported in flight by the dynamic reaction of the air against its lifting surfaces, and whose free flight does not depend on an engine. Most gliders do not have an engine, although motor-gliders have small engines for extending their flight when necessary by sustaining the altitude (normally a sailplane is on a continuously descending slope) with some being powerful enough to take off self-launch.

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