1)when rotated the mast itself adds depth to the chord to the mainsail main up near the luff,
2)on the minor axis, wing mast adds flexibility on the top of the mast, allowing the top of the main to twist off considerably when the mast is fully rotated, but adding fullness at the luff (the mast itself!), when adjusting in the mainsheet. More tuning potential.
3) Removing mast minor axis rot., mast is stiffer, and while sheeting in, removes top main 'twist off', decreasing wind surface area of both mast and sail (depower or light air). With the mast at more neutral rotation, luff and downhaul spreads curve over entire mast, which radically flattens the mainsail for depowering/light air. (I still can't figure it all out!)
Last edited by rexdenton; 06/16/09 09:42 AM.