http://www.ul-segelflug.de/blog/320-schwanzlos-ultraleicht-zwei-neue-ulsf-projekte-in-guter-gesellschaft.html

Translated to English
here.

About 25 years after the first flight of the SB 13 well the
Akaflieg Karlsruhe deals with a flying project of the FAI-15 m-class, which
already is available in the form of a remote-controlled 4 m model for flight
tests available. For the design of the AK-X, the Karlsruhe in advance had
analyzed several Nurflügelkonzepte. This, the project group is came to the
conclusion that for the AK-X only a rückgepfeilter flying in question occurs
where large winglets with integrated rudder flaps should also assume the
function of rowing at the page. It remains to be seen, whether can the AK-X lead
upon completion of flight tests with the large model in a man-carrying variant
and waiting for the construction, in contrast to the SB 13 with flight
characteristics that are controllable by "normal experienced pilots".