Today here in Abu Dhabi, winds at 330/12, 40C, QNH <1000 allowed to get foilborn on steel inverted Y foils. Idefix VII did not foil for long as ventilation caused total lost of lift resulting in bow dive.
Rich Miller was the first to come with the concept of inverted Y bow foil which he tested very successfully on a windsurfer in California. Further information can be found under: www.foils.org/miller.htm
Foil improvement is again at the order of the day, the concept looks feasable.
