A swept wing ultralight delta with one set of battens. It, not surprisingly, looks like the Highly Strung Kites 3.11 SL. It is possible that a German plan for this kite can be found in the magazine Hoch Hinaus issue 4/93 (?) The size is about that of a TOTL Spin-Off (short of building it I can't figure out how to calculate the size of the 3.11 SL from this plan...)