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Nacra 5.8 main sheet 7:1 diagram, anyone….? Or picture..?  Bottom

  • I have a new rope to install in my block that came with the boat that was definitely strung wrong. Cannot find any diagrams online. Can anyone share a pic? Thanks in advance.

    --
    Aberdeen, Washington State

    1990 NACRA 5.8
    2017 Hobie Getaway

    Memento Mori...
    --
  • This is a picture of a low profile 7:1. Click on the pic to enlarge.

    https://www.thebeachcats.…ictures?g2_itemId=130420



    Edited by pknapp66 on Jul 20, 2021 - 07:04 AM.

    --
    Pete Knapp
    Schodack landing,NY
    Nacra I20,P18, P16,H16
    --
  • https://www.harkencanvas.com/uploadedImages/Tech_Corner/Reeving_Diagrams/6-1-cam_reeving-diagram-lg.jpg?n=7390
  • https://spitfiresailing.org.uk/wp-content/uploads/2015/11/Mainsheet.jpg
    hmmm i guess these don't show a 7:!



    Edited by MN3 on Jul 20, 2021 - 08:17 AM.
  • pknapp66This is a picture of a low profile 7:1. Click on the pic to enlarge.

    https://www.thebeachcats.…ictures?g2_itemId=130420Edited by pknapp66 on Jul 20, 2021 - 07:04 AM.


    The irony is that mine does not have the anchor loop below the top block. It only has it on the bottom.

    --
    Aberdeen, Washington State

    1990 NACRA 5.8
    2017 Hobie Getaway

    Memento Mori...
    --
  • You need to be able to tie off at the top block to go 7:1. If you have Harken Carbo blocks (like shown in the 3rd post of this thread), you can pass the end of the sheet through the center of the upper block and tie off with an 8 knot. Or if your boat has a boom, you can add another boom bale and tie off to that (but I believe the 5.8 is boomless). Otherwise you’re going to have to get creative because if you can only tie off to the lower block, the most you can get is 6:1 purchase.

    sm
  • Just so you can call things by the correct names:

    QuoteI have a new rope to install in my block that came with the boat that was definitely strung wrong.

    if it controls a sail it is called a sheet

    you don't string blocks, you reeve them

    Quoteanchor loop below the top block

    you tie off to a becket (or a Strop if it is cloth)
  • https://www.thebeachcats.com/gallery2/main.php?g2_view=core.DownloadItem&g2_itemId=135292&g2_serialNumber=4


    Here is my main block with the original sheet, and I don't believe it is correct. I want to reeve the new sheet and cannot find a diagram anywhere.



    Edited by zenwalrus on Jul 20, 2021 - 10:48 AM.

    --
    Aberdeen, Washington State

    1990 NACRA 5.8
    2017 Hobie Getaway

    Memento Mori...
    --
  • DogboyYou need to be able to tie off at the top block to go 7:1. If you have Harken Carbo blocks (like shown in the 3rd post of this thread), you can pass the end of the sheet through the center of the upper block and tie off with an 8 knot. Or if your boat has a boom, you can add another boom bale and tie off to that (but I believe the 5.8 is boomless). Otherwise you’re going to have to get creative because if you can only tie off to the lower block, the most you can get is 6:1 purchase.

    sm

    I wish I had the becket at the top...But it is on the bottom, and the reverse of all the modern blocks I am finding, that have the becket in the middle and the small block out front.

    --
    Aberdeen, Washington State

    1990 NACRA 5.8
    2017 Hobie Getaway

    Memento Mori...
    --
  • pknapp66This is a picture of a low profile 7:1. Click on the pic to enlarge.

    https://www.thebeachcats.…ictures?g2_itemId=130420Edited by pknapp66 on Jul 20, 2021 - 07:04 AM.


    Mine is just slightly different...Cannot seem to find mine anywhere.

    --
    Aberdeen, Washington State

    1990 NACRA 5.8
    2017 Hobie Getaway

    Memento Mori...
    --
  • UPDATE:
    If anyone else performs an exhaustive search for this elusive, rare and undocumented 8:1 Mainsail block system, here is the correct method.

    https://www.thebeachcats.com/gallery2/main.php?g2_view=core.DownloadItem&g2_itemId=135302&g2_serialNumber=3

    --
    Aberdeen, Washington State

    1990 NACRA 5.8
    2017 Hobie Getaway

    Memento Mori...
    --
  • Picture makes all the difference - yep, your system is designed for 8:1, not 7:1.

    sm
  • I think the Nacra 5.7 7:1 is similar. In this case, the 7th turn is accomplished with a single block below the lower triple that leads to the cam cleats and fair lead for the main sheet. In my setup the sheet also acts as the traveler control.

    https://i.imgur.com/ZveWuyMh.jpg

    https://i.imgur.com/vnPrlLNh.jpg

    https://i.imgur.com/MDhuvuwh.jpg

    --
    Tom
    NACRA 5.7 (1984 Sail 181)
    Pennsylvania
    --

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