Thanks for the help. Two of you have suggested that your sterns are not modified. What modifications are you referring to? How would I be able to tell?
I'm not sure - I assumed he meant that some people would remount their rudders so they would cant with the hull.
What has caused me to ask this question is that I have one rudder that is in the plane of the hull and one that is plumb. The NACRA owner mannual does not indicate. The boat is relatively fast, so I am being careful about changing anything.
I would think the rudders would be more efficient (very slightly) if they were plumb with each other - how did you measure "plumb with the hull"?
There is a good bit of hum coming from the leeward rudders at certain speeds, which I believe is because the trailing edge was filled to knife like edge instead of the flat. Does plumb-ness or toe-in induce any hum?
Dunno -I have yet to find a reliable solution to silencing the humm
Jake, By “rubber snubbers” so I sure of what you mean, you mean the part that connects the tiller cross bar to the tiller arms and provides the flex to allow the system to be steered? Can those rubber snubbers be turned a quarter turn and be redrilled and reused if the current alignment is off? Does an adjustable system like the 6.0 exist? Did you check the alignment with the boat rigged and tensioned? Is this necessary?
Boat was rigged and tensioned - but I don't think it matters for the rudders. There's very little side stress from rigging pressure on the hulls behind the main beam. I really doubt the rudder area would be affected in any finely measureable amount. As far as an adjustable setup goes, you could probably find a way to retrofit the 6.0 style adjuster somehow...but there's really no need. Once you have set the rubber pivots up correctly, there is no need to adjust them again. Even on the 6.0 if you aligned the rudders (and the adjuster hadn't slipped) you didn't need to do anything else.
I'll measure the amount of rake in the rudders and compare it to the hull tonight - my interest is peaked.
