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.
The JOKER is built in very high quality and designed for long durability under extreme loads. The numerous innovations and reinforcements call for a very elaborate production process. At the JOKER U-Turn also trusts in the newest generation of the refined version of the Thriller-fabric PX40. Only materials which passed extensive long-term tests and have shown good values were used in the JOKER. But also in the processing everything is done to ensure long durability and form fidelity, that includes multiply reinforced sewings and reinforcements at the line attachment points and V-tapes. The line connections are equipped with the Line Loop Protection (LLP). Thereby the Kevlar core is spliced into the connection loop which additionally prevents snagging of the lines at the point of separation.