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Sheets getting hung up

  • 15 Sep 2018 16:38
    Quote
    Reply # 6670513 on 6660961
    Anonymous member

    Thanks Arne, I'll give that a go as well. Makes complete sense.
  • 13 Sep 2018 17:22
    Quote
    Reply # 6667832 on 6660961
    Anonymous member (Administrator)

    Jim, 

    that is correct. The problem was that Johanna's mast was a bit too short, so the sail had to be canted forward when fully hoisted. Those rubber hoses helped me out there, but on later rigs with the same sort of sail, I have not needed them, since taller masts have let me set the sails with vertical, or a tiny bit aft-leaning luffs and leeches.

    See JRA Magazine 42 from Jan 2004.

    Arne
  • 13 Sep 2018 14:14
    Quote
    Reply # 6667516 on 6660961
    Anonymous member

    Arne, I recall you experimented with fitting pieces of rubber hose to the batten through which was passed the sheetlet. When not under tension, the sheetlet was held away from the sail and batten, preventing hangup.  Am I correct on that?
  • 12 Sep 2018 19:08
    Quote
    Reply # 6666455 on 6660961
    Anonymous member (Administrator)
    Jonathon wrote:

    Hi there,

    I've got a six panel 175sq.ft, 8% cambered sail designed by Alan Boswell and using Arne's cambered sail construction technique. Its great, sails well to the wind and super well balanced. I used Arne's modified pilmer sheeting system and it works really well but when I move from a port to starboard tack the sheets can get hung up on the battens. I've tried lengthening the upper sheets but this prevents  the sail from being tightly pulled in for heaving to (the blocks get too close to the sheeting point), but it does seem to solve the problem with hanging up.

    Question is,

    a)would a traveler improve all of the above (currently using single attachment point)

    b) thinking of moving the sheeting point further aft, maybe using a boomkin

    c)should I consider extending the upper batten

    Appreciate any feedback. Cheers


    Jonathon.

    When I have had this problem, it has been because the leech was leaning forward. If you are able to bring the leech to be vertical, or even leaning a bit aft (ease the tack parrel and pull on the LHP/THP ), the chances are good that the sheetlets will pass clear of the batten ends as you tack or gybe.

    Arne

    Last modified: 12 Sep 2018 19:10 | Anonymous member (Administrator)
  • 12 Sep 2018 17:18
    Quote
    Reply # 6666209 on 6660961
    Anonymous member

    I've been wondering how ABS rings would work for sheetlets, be easy to make from abs pipe or abs fittings.

    I tried nylon links from the nylon chains but there was way too much friction.

    Bill F
  • 10 Sep 2018 00:25
    Quote
    Reply # 6661348 on 6660961
    Anonymous member

    Thanks David, I'll try the Dyneema and fittings first and then think about extending the batten if that doesn't work.
  • 09 Sep 2018 16:15
    Quote
    Reply # 6660971 on 6660961
    Anonymous member

    a) A traveller won't help with this.

    b) The sheet angle that you show in the drawing is fine, there's no point in moving the deck blocks further aft.

    c) Yes, extend the top sheeted batten by 150 - 200mm. This helps a lot. 

    Also, decrease the weight of everything. Use 4mm bare Dyneema for sheet spans. Try a 5/16in sheet, but you may find this too small to grip. 3/8in is the largest sheet rope size you should need. Try Barton rings instead of blocks. They are lighter (but there is more friction; in a small rig, this is acceptable).
  • 09 Sep 2018 15:31
    Quote
    Message # 6660961
    Anonymous member

    Hi there,

    I've got a six panel 175sq.ft, 8% cambered sail designed by Alan Boswell and using Arne's cambered sail construction technique. Its great, sails well to the wind and super well balanced. I used Arne's modified pilmer sheeting system and it works really well but when I move from a port to starboard tack the sheets can get hung up on the battens. I've tried lengthening the upper sheets but this prevents  the sail from being tightly pulled in for heaving to (the blocks get too close to the sheeting point), but it does seem to solve the problem with hanging up.

    Question is,

    a)would a traveler improve all of the above (currently using single attachment point)

    b) thinking of moving the sheeting point further aft, maybe using a boomkin

    c)should I consider extending the upper batten

    Appreciate any feedback. Cheers

    2 files
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