Primary gliders are a category of aircraft that enjoyed worldwide popularity during the 1920s and 1930s as people strove for simple and inexpensive ways to learn to fly.[1]
Constructed of wood, metal cables and cloth, primary gliders were very light and easy to fly. They generally had no cockpit and no instruments.[1]
- ^ a b Schweizer, Paul A: Wings Like Eagles, The Story of Soaring in the United States, pages 14-22. Smithsonian Institution Press, 1988. ISBN 0-87474-828-3