hi folks, i had a great idea recently i'd like to share with you. (viewtopic.php?f=159&t=2363952&start=0). i heard in the meantime that the idea is not new but anyways. i was not able to find the according thread so please someone post the link. i always hated the turbulances leeward finns tend to cause close to the board. you can feel how this holds back the board. to angle the fins towards the tip of the board for a few degrees is no solution in my opinion since it trades the turbulances close to the surface with a bad angle of attack at the rest (90% ?) of the fin. e.g. if the windward fin's aoa is, lets say 10 degree the leeward fin's aoa is 16 degree if you angle each fin for just 3 degrees.
i participated in the kte race in austria with my modified twoag raceboard last week. ok, the results where not ..., you know ..., but i was able to see the potential. almost no turbulances and fins parallel. the way to make them is rather simple. i cut the fins with a jiggsaw and milled the front outside and the back inside to sharpen the edges again. take a good look at the picture. this way the aoa close to the board is pointing towards the tip of the board a bit.
what do you think? as for myself, i need to get more time on the water with my racebaord to get better. right now it is definately me who needs to get into better shape - tacks and downwind practice.
h.