i think they all do that

brought mine back from the lake today, checked and they hang down about halfway when the casting is held at the normal angle

the nacra rudders must be much heavier than the plastic rudders i've seen on hobie 16's

the bungee system is just to kick them back and prevent transom damage, not to hold them clear of the water

i'll be adding another jam cleat to the alloy tubes that are riveted to the castings to hold them up all the way

got the idea from looking at airborne's 5.2 pics, some of which have been posted in this thread