This translates into this: a short fat foil will provide the side force needed to control the boat off the start line - when it's moving very slowly in the water. A long narrow foil will stall and not generate much lift until it achieves a certain amount of flow over it's surface. This will make a long narrow foil very sensitive at low speeds and susceptible to stall.
The conclusion is correct in general, however not only aspect ratio but also the area itself is important (a high aspect ratio foil would work, if it is only big enough). It is hard to judge the controlabilty without knowing area and span.
But even more important: I have my doubts that it will bring any hydrodynamic advantage upwind. The reduced induced drag of the increased span, might be easily overcome by the increased friction drag due to reduced Reynoldsnumber. If the area is too small, there will be also a risk of cavitation at high speeds.
Would be interesting if the production boat will have more conventional daggerboards or if they learn it the hard way.
Cheers,
Klaus
