Acro constructer legend Ernst Strobl trusts in the U-Turn typical High-Tech design of the leading edge with pressure-optimized opening sizes and the reinforced Precision Profile Nose (PPN) to optimize the flow-around at the nose area. The PPN+ additionally holds the individual cells in shape and ensures the air income through the rods that are worked in in the middle of the openings - in combination with the valves in the bottom sail that‘s a pure dynamic weapon. The additional aeration through the Pressure Balance Valves (PBV) in the bottom sail is an innovation by U-Turn. Through the PBV the wing is provided with the necessary pressure, even in extreme angles of attack in the aerobatics. The High Pressure Crossport Design (HPCD) optimized the lateral aeration and provides a balanced internal pressure of the glider. All line attachment points are multiply reinforced. Like at all U-Turn Acro gliders also the JOKER is equipped with the Stabilo Security Function (SSF) to quickly resolve possible problems caused by swaying movements.