Well , we all know that a twin tip will plane as fast ( if not faster) than a directionnal
board but it wont go upwind as well in marginal conditions due to its limited fin area.
Here is a TT i have been testing lately that will go upwind even when hardly planing .
The foil is symetrical and adjustable in depth to suit the wind strength.It is also raked
at an angle so that when sailing and the board is tilted it will lift the board upwind like
a daggerboard on a windsurf. It is also placed inwards from the rail, so that pressure
on the heels stop the board from fliping over if to much lift is achived.
Although the foil on the photo is 30cm long I have found a water depth of 10-15cm to
be adequate.I have often use this board for long distance cruising upwind. To go down
wind again you have to retract the foil and it will sail like any other TT.
thx to http://www.cyprus-wind.com/
