Sail twist

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This topic contains 6 replies, has 4 voices, and was last updated by  Brent Headberg 1 week ago.

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  • #1371

    zork
    Participant

    Is there any rule of thumb for mast twist. Seems the sails are really
    flat if set up by the instructions. Kinda looking for advice from
    some of the ‘A’ skippers out there.
    Thx
    Gary

  • #1372

    DragonSailing NA
    Keymaster

    HI Gary,

    when I am checking twist on the main, I will usually hold the boat up, and look up at the main sail leach battens for my twist.

    I then adjust the vang so middle batten to lines up parallel with the deck, bottom batten should break in about 15 degrees, top batten should break out about 25 degrees.

    Then based on wind velocity and sea conditions I may change this up a little, but generally its a good starting point

  • #1373

    zork
    Participant

    Thanks ! ! How about the jib ? Typically at this time of year the
    winds on our pond are REALLY light. Windward struggles to fill the sails.
    Gary

  • #1374

    DragonSailing NA
    Keymaster

    You should always have your jib twist match you main twist,

    With the 95 it is crucial that the LUFF tension is correct, you need that sail to generate lift and if the leading edge is too flat it will really affect acceleration speed …. everything, so dont oversheet it…I get my other measurements right then completely untension the halyard ( not the forestay) then I sheet it in with just enough tension to barely get rid of the wrinkles, tension will get adjusted a bit based on wind speed etc.

  • #2008

    tprice
    Participant

    My jib boom weight somehow disappeared and the whole luff was tensioned on the Halyard (jib Cunningham) and not the wire eye. The performance change was very apparent! Weather helm as the jib entry was too flat and also the leech now was looser. Stuck a pin through temporarily and voila! Back to status quo. As the previous reply stated, jib luff tension and cloth tension matter a lot. The topping lift, I find is a powerful tool to control luff tension and leech shape.

  • #2011

    zork
    Participant

    Do you use the ‘manual’ position for the mast rake and boom positions ?
    Set it and forget it ?
    Thx

  • #3142

    New DF95 Sailor here. I just finished assembling my boat and have sailed a couple of times. I set the backstay to 1090 and the closest I could get was 1130. I set all other measurements in the instruction manual but my Mainsail has wrinkles from the tack up to the first batten. I tried adjusted the vang both looser and tighter, but the wrinkle was persistent.

    I thightened the Mainsail Luff and that helped, but there’s still a slight wrinkle. The only thing that took the wrinkle out was to make the foot almost flat.

    Any ideas?

    Brent

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