Viper SD-4 in LX equip. on 06/22/2013 attended at the airshow in Senica (LZSE). Viper presented his art in several minutes flight demonstrations. Participants in events were fascinated of "full" aircraft equipment - rich dashboard, digital instrumentation, autopilot and rescue system. They appreciated the leather in the aircraft and color design that was attractive for the eyes of many visitors of Airshow.