With the absolutely new 23-meter-sailplanes, Antares 23 E and Quintus M, the collaboration of Lange Aviation and Schempp-Hirth Flugzeugbau present for the first time at the trade fair AERO in Friedrichshafen (April 13-16, 2011) the newest fruits of their partnership. The consistent and uncompromising development will set new standards in the open class.