Primary glider

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Primary glider is a blanket term used to describe an extremely simple type of aircraft that enjoyed worldwide popularity during the 1920s and 1930s as people strove for simple and inexpensive ways to learn to fly. Constructed of wood, metal cables and cloth, they were very light and easy to fly. They generally had no cockpit, no instruments and were only flown very close to the ground after being towed by a group of people running down a hill. Modern versions of primary gliders are still built, but, while they are much like the originals in appearance, they are usually constructed with composites and safety enhancements.