On 11 Dec 2008 12:30:03 GMT, Andor Holtsmark
wrote:

Good news from Lange Aviation:
http://lange-aviation.com/htm/english/news/news.html


Especially note the last sentence:

--- snip ---
The battery will also be used by the propulsion system of the self
launching Schempp-Hirth Arcus E. The propulsion system for the Arcus E
is based upon the proven propulsion for the Antares 20E, and it will
be installed by Lange Aviation.
--- snip ---

Looks like it's finally starting to become official.
The Arcus is going to be the flapped version of the Duo Discus.

Bye
Andreas