In H16 Trapseat racing when racing up wind, we raise one rudder up especially in light winds or long runs but always put the rudder down for a tack. If a lot of tacking is involved, I keep the rudder down or in very gusty or turbulent situations. I find I always do better than those who do not lift a rudder, again especially in light winds. The Tornado may not gain from this technique but it seems the H16 does.