Split rig - luff, leach, sling point, downhaul...

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  • 23 Nov 2016 16:43
    Reply # 4407886 on 4195606
    Deleted user

    It's really starting to come together now.  I took the image below carefully over a green screen so that I can lift measurements off it easily.  Stats as stated in my last post.             

            

    Who can resist a whimsical background when you've already shot the chromakey?

    So...   any last comments or opinions before I begin cutting cloth for the model?  


    Last modified: 23 Nov 2016 16:47 | Deleted user
  • 14 Nov 2016 19:47
    Reply # 4389459 on 4195606
    Deleted user

    Ok. To sum up, it's looking like:

    1. 35% sail balance.
    2. 6 panels, top two full, camber of 5% #6, and 6% #5.
    3. Lower 4 panels split, main sails 7% camber, jiblets 11%.
    4. Yard angle = 30 degrees
    5. Rise = 5 degrees
    6. 56 sq meters, 5.5 meter battens, 11.8 m tall.
    7. Aluminum mast 12.9m plus bury.

     

  • 13 Nov 2016 22:08
    Reply # 4382645 on 4381753
    Annie Hill wrote:
    Slieve McGalliard wrote:

    Seriously though, if you want the ultimate lazy (wo)man's rig then you should be drawing up a split junk. I reckons it gives the best of everything for just a little bit more sewing, and you don't mind sewing, so it would be a win - win solution????

    Dear Slieve - I wouldn't dare!!!!!
    Why not?
  • 12 Nov 2016 22:44
    Reply # 4381753 on 4381749
    Slieve McGalliard wrote:

    Seriously though, if you want the ultimate lazy (wo)man's rig then you should be drawing up a split junk. I reckons it gives the best of everything for just a little bit more sewing, and you don't mind sewing, so it would be a win - win solution????

    Dear Slieve - I wouldn't dare!!!!!
  • 12 Nov 2016 22:33
    Reply # 4381749 on 4195606

    Arne - With the split rig I'm looking for the drive from the jibs and use the main panels to deflect the air and speed it up over the lee side of the jibs. On Amiina's latest rig we used 7% in the lower mains, so 6% in no.2 and 5% in the top, both without splits, would seem to be a sensible compromise.

    Annie - I'm afraid you may have missed the point. When it blows hard, at night, it also rains heavily. With a bald head one always wears a hat, so the head torch shines on the inside of the peak and blinds you, hence the quickly grabbed torch in the teeth. The real trick is to get back below without losing the torch overboard, along with your dentures! As you get older you'll realise that dribbling is the least of your problems.

    Seriously though, if you want the ultimate lazy (wo)man's rig then you should be drawing up a split junk. I reckons it gives the best of everything for just a little bit more sewing, and you don't mind sewing, so it would be a win - win solution????

    Last modified: 12 Nov 2016 22:38 | Anonymous member
  • 11 Nov 2016 20:52
    Reply # 4379426 on 4377069
    Slieve McGalliard wrote:I do not want to have to start adjusting bits of string to adjust the shape of the rig with a torch in my teeth to see what I'm doing, just to make the boat go. No, I'm just too lazy for that.
    Hey, Slieve, there's a cool invention (that's been around for a couple of decades) called a head torch.  You have a strap around your head, it sits on your forehead and lights up whatever you wish to look at.  A wonderful device: saves sore teeth and dribbling.

    But I'm with you: I'll put in a lot of effort now to save effort later.  David and I have just been discussing SibLim's rig and my insistence on an absolute minimum of running lines!  He's come up with something that might even please me (poor man).  (But at the end of the day, designing a rig for a one-off boat, is a little like playing Fan-tan - something of a gamble.)

    Last modified: 11 Nov 2016 20:54 | Anonymous member
  • 11 Nov 2016 11:10
    Reply # 4378274 on 4195606
    Anonymous member (Administrator)

    Slieve,

    that makes sense to me. I generally aim for 6% camber in the almost horizontal transitional panel (no 3 from top). What have you settled on in your lower main panels, 8%?

    Arne

  • 11 Nov 2016 09:35
    Reply # 4378104 on 4195606

    Scott, you said, " Split for the bottom 4 panels, and full panel camber in the top two.  Soooo.   How much camber?  12% ?"

    The easy answer is - No, not 12%. 

    The difficult answer is a more specific figure. How about 5 in the top and 6% in number 2? Does anyone have any thoughts on that?

    Cheers, Slieve.



  • 10 Nov 2016 22:58
    Reply # 4377429 on 4195606

    Fantastic reply!

  • 10 Nov 2016 19:42
    Reply # 4377128 on 4195606

    Slieve, I used to fancy fan topped sails, but not in a fanatical way. My sail for weaverbird has no LHP, and the YHP does nothing when under full sail, only needing light tension when reefed. It just goes up, comes down, in the same fantastically easy way as a split rig. I put this down to high AR, a short yard at an angle of only 45 degrees, and short batten parrels. True, the upper and lower sheet have to be handled, but the Easyblock makes that - er, easy, and gives better control over twist. In fact the rig is so easily handled that I would have time to dance a fandango, if I were so inclined.

    Enough fandangle!

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