For the leading edge of the latest JOKER Edition, acro designer legend Ernst Strobl relies on the modernized high-tech design typical of U-Turn with pressure-optimized opening sizes and the reinforced Precision Profile Nose (PPN) with Nitinol alloys to optimize the airflow in the nose area. The PPN+ also keeps the individual cells in shape and ensures air intake by means of wafer-thin Nitinol wires incorporated centrally over the openings. – In combination with the valves in the bottom sail, this is a pure dynamic weapon. The additional ventilation provided by the Pressure Balance Valves (PBV) in the lower sail is an innovative invention from U-Turn. The PBV provides the wing with the necessary dynamic pressure even at unfavorable angles of attack and thus offers a higher tolerance range at extreme angles of attack in aerobatics. The High Pressure Crossport Design (HPCD) with internal valves optimizes the cross ventilation for a constant internal pressure of the wing. All attachment points are reinforced several times. As with all U-Turn acro wings, the Joker is also equipped with the Stabilo Security Function (SSF) to quickly release any hang-ups.