CAD designed 1.5m² arch

Still under construction (modification) State : still not flying properly.

My first try with an arch. It inflates very well, does not luff, but does not take off !!! I removed some fabrics at the leading edge and it's a little better now. It's still very bad.

Specifications : 3m spanwise, 1.5m² (AR=5.85). Profile : MH31 17%. 20 cells, 6 air inlets (with valves).