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.
The Schweizer SGP 1-1 is an American, amateur-built, single-seat, high-wing primary glider that was designed by Ernest Schweizer and constructed by the Mercury Glider Club between 1929 and 1930.
Primary glider
…Sands Replica 1929 Primary Glider Schweizer SGP 1-1 Slingsby Grasshopper…