Hi Jami, Arne,

though this is not an a recent thread, I would like to add another factor for chosing the sheet system and the amount of anti-twist needed: mast balance.

As my Ilvy right now carries a Johanna 60 sail (copy of Boudicca's sail) with a Johanna sheeting system, one would expect those to work together quite nicely as Arne designed and built several of those working well together. However, the main difference to Arne's designs until then was that he didn't go for high mast balance (correct me if I'm wrong). I did, to about 27%. The same sheeting system on the same sail design (except for mast balance) suddenly doesn't work so well any more. The top panels are slightly stalling while the bottom panels are sheeted too losely.

A call for less anti-twist along higher mast balance?

Arne has planned a sheeting system (”Johanna sheeting”) to reduce twist which to my understanding means that for a given amount of sheet the upper part of the sail will be sheeted in more/faster than the lower part.

However, I would need just the opposite.

The length of my battens, the sheeting point or some other factor/s seem to pull the top part of the sail in too strongly compared to the lowest panels and thus pulling the upper part downward way too much - and this is without Johanna-sheeting.

What kind of sheeting system would counter this?