Evo da ja ne pametujem, prenosim što kaže "tata":
How to tack efficiently, use the trim tab, balance the RC 44, gybe… Discover Russell’s tips!
Trim tab:
Using the trim tab is a powerful adjustment. It is important to think of it in the same way as adjusting the sail trim. The advantage of a trim tab is that the foil effectively becomes asymmetric and therefore the keel area can be reduced. One can also adjust the amount of asymmetry for the different situations. My first impression using the tab on this boat is that it is very easy to use too much. If you use 10 degrees you can physically see the boat moving sideways! It is designed to be a fair fit with the keel fin at a 5 degree angle however, 7 degrees seems to be a good average number when sailing upwind. In stronger winds I consider using less tab angle when the boat is sailing at speeds of 8.3 knots or more. I view the trim tab as operating in a similar fashion to an aeroplane wing flap. Any time the boat speed is really low you should generally use slightly more tab angle to prevent the boat (and foils) from sliding sideways. One should also use more angle when the rudder is being unloaded, such as rounding a bottom mark or at the beginning of a light wind tack. Tactically it should be possible to briefly use 9 degrees or more in order to squeeze someone off. Downwind I suggest using almost no tab unless you are reaching at higher heel angles, where you should use 1-2 degrees.
