The 1994 Delka glider apparently flew well enough on early test flights with weight shift for pitch control, and tip rudders for roll however weight shift for pitch must have been compromised with the pilot moved inside the wing (no pendular agumentation). The pitch control was some how assisted by control surfaces.
Apparently the test pilot Didier Favre was killed on testing due to structural failure. Laurent Kalbermatten dropped the concept however has proceeded with the Woopy Fly paraglider hang glider hybrid.
Wing area: 13.7 m²
Wing span: 10.5 m
Hang glider weight: 25 kg