L39

The Aero L-39 Albatros is a high-performance jet trainer aircraft developed in Czechoslovakia by Aero Vodochody. It was designed during the 1960s as a replacement for the Aero L-29 Delfín as a principal training aircraft. The L-39 Albatros has the distinction of being the first of the second-generation jet trainers to be produced, as well as being the first trainer aircraft to be equipped with a turbofan powerplant. The type was widely exported to a wide range of international operators as a military trainer. Wikipedia