Rolf, I never had a real check to the telltales behavior while letting the downhaul off and sheeting. Thanks for the clue, I will check this next weekend. Mast rotator is usually pointing at the rear end of the daggerboard for light air.
The mainsail was manufactured by Elliot Pattison (Nacra sail suppliers in North America, I believe). I have 2 windows for the telltales. one at the first third and the other one at 3/4 of the sail(just slightly higher than the spinnaker hound).
Now let me give you a snap shot of the telltales behavior in light air. To get decent speed, I usually bear off until the lower telltales are streaming aft, if I get closer to the wind and the windward telltale start to lift, the boat get deceptively slow.
Now here the pictures: both lowers telltales streaming aft, top windward top telltale lifting and leeward one streaming aft (not enough leech tension?), both leech telltales flying backward to leeward (to much leech tension?)
So I wonder if I read the telltales correctly because at this point they get me quite confused. Would appreciate your input.
I previously owned a hobie cat 18 and a nacra 5.2