Report from Friedrichshafen, New Open-Class Gliders

Report from Germany - Dave Nadler 14-April-2011

New Open-Class gliders !

At the Aero show in Friedrichshafen, a few new gliders are on exhibit.  Lange Aviation has an Antares 23E, which is a longer-winged version of the Antares 20E and features the Antares electric self-launch system.  Antares 23E has 5 water tanks each side, including a new tank aft of the spar (in back of the batteries).  Holding 250 liters allows a wing-loading range of 40-58 kg/m2 (8.2-11.9 lbs/ft2), with the excellent high-speed performance of the Antares wing.


Antares 23E and 18T (in back)



Schempp-Hirth has their new Quintus M suspended from the ceiling, which makes an impressive display. Quintus shares the wing with Antares 23E, but is available with a gas self-launch, a turbo (sustainer), or without motor. Minimum wing-loading varies according to motor, but same maximum as Antares 23E. The wingtips are a bit different from Antares, featuring an additional bend upward and a different winglet (design courtesy Dr. Maughmer).  Quintus has 6 water tanks per side, as the area Antares uses for batteries is available for water (though Quintus has a fuel bladder in back of the spar at the wingroot).  When asked about the polar of Quintus, Biggo has a big smile and says "it will be adequate".  They've decided not to publish polars anymore.  Perhaps Lange will publish a polar for the 23E.


Schemp-Hirth Quintus Suspended at Aero2011



At Schleicher's display, Martin Heide has also a big grin on his face after the first test-flight of his ASH-30. Martin chose to make a lower max wing-loading in order to get a lower minimum wing-loading for the two-seater. This glider has a max wing-loading of just under 50 kg/m2 (about 10.2 lbs/ft2).


Martin Heide with ASH-30



All the new open-class gliders are designed to the 850kg max (certification). To get a high wing-loading, either the span is limited (23-meters for Antares 23E, and Schempp-Hirth Quintus), or an extreme aspect ratio is required (Dick Butler's Concordia). High wing-loading will be important at the Uvalde 2012 World Championships - Antares 23E and Quintus look like the ultimate Open Class weapons for this contest !




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  5 comments for “Report from Friedrichshafen, New Open-Class Gliders

  1. April 15, 2011 at 2:48 pm

    Thanks, Dave, nice photos!

  2. Andrius
    April 18, 2011 at 11:38 pm

    How will you know speeds to fly if they don't publish polar?

  3. April 19, 2011 at 2:30 am

    Wow. Great article. What are the prices?

    • April 23, 2011 at 4:48 am


      Contact the respective dealers in your country for price information.

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