Certification
The 1-19 received type certificate G-17 on 19 June 1946. The type certificate is currently held by K & L Soaring of Cayuta, New York. K & L Soaring now provides all parts and support for the Schweizer line of sailplanes.
The 1-20 was never certified and these aircraft are flown as experimental aircraft.
Read more about this topic: Schweizer SGU 1-19