sentences:  The 1-26 received type certificate 1G10 on 14 December 1954.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.Paul A Schweizer was a proponent of the One-Design concept and the 1-26 as the aircraft by which to establish a one-design class in the US.