Not sure if it is correct or not, but to me canting is angling the rudder (or masts or hulls) sideways. Raking is fore and aft, which I presume is what you mean.
Raking them to achieve balance is necessary, viable and not too difficult. My thinking is that the rudders have to turn anyway, so turning them through 180 degrees does not need any more complication. Whereas raking them does.
To the best of my knowledge, no one has come up with a full size working version that rakes automatically after a shunt (water pressure on the foil won't do it) so you need another string. Not a big deal, just more complexity.
rob
On Wed, Sep 7, 2011 at 11:18 PM, Gardner Pomper <gardner@networknow.org> wrote:
Rudders continue to be my main concern on the harrys. I am enamored of the asymmetrical setup that Todd has demonstrated on his proa daysailer, but I am also concerned about the instability issues that theory seems to predict on the rudders (from Tom Speer and others).My question is what effect it would have to cant the rudder a small amount, while keeping the axis of rotation vertical. Does this effect the stability at all (plus or minus)? How would it effect the lift? I don't seem to be able to come up with a thought experiment that would give me a clue about what effect, if any, this would have. Does anyone know something that would help predict this?- Gardner
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