The company ILEC was founded in 1981 by Jürgen Schindler and Rudolf Brözel. Initially, the offices were in their own home, later a room was rented directly at the Bayreuth airfield. Here the production of the first devices of the famous Variometer SB-7 began, followed by the Sollfahrtrechner SB-8. An important element for the successful variometer was the development of the ILEC TEK nozzle. Almost every glider today flies with a TEK nozzle from ILEC.