RobKoci said:I for one am totally sold on windward heel to weather in light wind. You get height like you wouldn't believe. It's freaky. I sure hope everyone else gives up on it, 'cause it kicks.
Owyn in Barnsley said:all depends on how big your cobblers are!
mlemieux1978 said:Everyone keeps talking about wetted surface. the volume of the boat that is submerged is not going to change as a basic rule of bouyancy. It stands to reason that the wetted surface may actually be more since to stay afloat, the hull will actually be drawing more when you heel it over.
as far as the phenomena being a function of the rig, I believe its because of the unstayed mast. Like a freedom unstayed rig, the top of the mast will naturally fall off to leeward. Maybe heeling to windward counteracts that while going upwind and makes it more efficient.
well i are a engineer but i always get my concaves and convexes mixed up!RobKoci said:The one thing that I use as an indication that I have the foils working right with windward, upwind heel is that the tiller is about 1" to 1 1/2" to lee of the boat's centreline with NO HELM PRESSURE. No helm pressure is really important. I can let the tiller go and the boat still tracks staight with the rudder in that position. It's kinda cool cause is shivers a little like you would imagine the fin of a fish but sticks to that general position. Is it possible (this question is directed at the engineers) that the tiller is acting like the flap at the back of a airplane wing relative to the board? Because that is certainly the position it takes. If that was the case, then the board and rudder would be creating a shape similar to the shape of the sail (concave on the windward side).
Does this make any sense?
RobKoci said:...passing around the hull on the windward side over a greater distance than over the leeward side, thus creating a lift toward the windward side. It is the same as the arodynamic principle that creates lift on the convex side of the sail or the top side of an airplane wing.
RobKoci said:Hmmm. Then where does lift come from?
RobKoci said:I just read this off the Rooster website:
, then use positive rudder to keep the boat on its normal course. At first this rudder feels like a push, but as soon as the board begins to generate lift then the rudder becomes light and neutral, but still over to the positive direction.
But don't anyone try this!! It is very hard and you won't like it!! In fact, forget this thread ever existed. Carry on with your leeward heel upwind. Please!!
RK
Merrily said:Rob, of course I won't try it. I hate trying difficult new things.But I read that off Cockerill's website and never understood about positive rudder. Which way are you moving the tiller?