Viper SD4 on 06/29/2013 attended the Airshow at an airport in Nove Zámky (LZNZ). During the flight to the Airshow we appreciated the beautiful scenery along the southern of Slovakia. We also tested reliable work of autopilot in aircraft, which is located in our LX version aircraft. At the airshow was placed in the VIP area, two our aircraft were presented in an interesting common flight demonstrations. We are pleased of public interest in aircraft, and also the photos of Viper with acrobatics master Zoltán Veres. We believe in a successful event in next year.