Bob Crantz wrote:



The Flettner "trim tab" improves stall characteristics of the rudder.

That may be true, but if you have to push the rudder to one side to
"balance" the boat, (doesn't drag increase with angle of attack?), then
you're going to increase drag. Better to trim the boat properly with
the sails and not have to shove bucket loads of water around.

Cheers
Marty
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