This is a Curved Twisted Surface Piercing T-Foil- or Ctwist batfoil for short. It is an experimental foil to be tested on the D4Z RC cat and on the Fire Arrow Test model. For more, go here:
http://www.boatdesign.net/forums/multihulls/high-performance-mpx-foil-self-righting-trimaran-test-model-36058-125.html
post 1871
