 The USAFA TG-4s were all donated to other US government agencies, such as the Civil Air Patrol or to aviation museums.Under the 1962 United States Tri-Service aircraft designation system the USAF 2-33 was designated as the TG-4A.This can cause confusion with a World War II training glider made by Laister-Kauffman and used by the United States Army Air Forces from 1941 to 1947.