Gust Adjust

Discussion in 'Sunfish Talk' started by altair, Jan 5, 2009.

  1. Shaun

    Shaun New Member

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  2. derekcjackson

    derekcjackson Member

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    This video with Greg is great. However, the way he has tied the halyard through the mast cap is not legal and is likely to pull the cap off the mast. As discussed at the NAs last year, it needs to tied complete through the cap. There are several ways to do it, one example is attached.
     

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  3. derekcjackson

    derekcjackson Member

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    I looked more closely at this picture. While it correctly illustrates the legal and safe way of putting the halyard through the mast cap, it is also illegal because that line was cut to be separated from the jens line for discussion purposes during the NAs.
     
  4. derekcjackson

    derekcjackson Member

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    The attached two pictures are from the same day as the above picture, prior to cutting the line. They illustrate the jens line through the mast cap correctly and legally.
     

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  5. Shaun

    Shaun New Member

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    The video version is one continuous line, and the rules state you are allowed one line. The "gust adjust video" version was voted and approved at the 2008 Worlds Championship, it was proposed at the 2008 NAs.

    From the class rules:
    3.7.3
    [FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]A rig to lower the point at which the upper spar lies against the mast (known as the „Jens Hookansen Rig‟) may be tied with an extra piece of line used solely for that purpose. The rig must be tied in such a way that the sailor may lower the sail quickly and easily by releasing the halyard. [/FONT][/FONT]
    [FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman][/FONT][/FONT]
    [FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]Once again, there is no alteration to the "Gust Adust Video" line.
    [/FONT]
    [/FONT]
    A more detailed of how-to will be posted soon.
     
  6. btsunfish

    btsunfish New Member

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    So essentially you're bending the spars to take draft out of the sail, like adjusting the backstay on a larger boat? Or do i have the wrong idea...
     
  7. Shaun

    Shaun New Member

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    More like reefing. On the jens rig the main halyard is let loose.
     
  8. Shaun

    Shaun New Member

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    Update: Confirmed today, Todd Edwards the class measurer says that the gust video version is the class legal version.
     
  9. Shaun

    Shaun New Member

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    The new full length "Gust Adjust" video with detail is now available at www.sunfishracing.org under videos. The format is mid to low-quality, so if you would like a DVD high quality version then please email me direct through this forum.

    thanks, and happy viewing!

    Shaun
     
  10. altair

    altair Member

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    Thanks for posting the video, now I understand the Gust Adjust. The only thing I could not understand was how far down the mast does the loop come? I would assume that it is the same distance from the normal halyard knot to the jens knot on the upper spar which would be about one sail clip. Does that sound correct?
     
  11. Shaun

    Shaun New Member

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    It is determined by how big your jens halyard loop is tied. Greg ties it about 16 inches long. Then the upper spar-the jens halyard is tied at a predetermined spot lower from where the main halyard is tied that results in the lower forward boom end being about 2-3 fingers off the deck when the jens is fully hoisted. Greg gives the length of the loop in the video, but the sound is limited by the camera I used. I plan to find a better camera in the future.
     
  12. fbjru

    fbjru Member

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    What are the advantages and disadvantages of using the "Gust Adjust" versus the much simpler idea proposed a few weeks back on this forum using an extra long halyard tied off in two places and essentially acting as two halyards? Has anyone played further with that idea?
     
  13. Shaun

    Shaun New Member

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    I haven't seen the other one used, so I cannot answer that well, but I am wondering if that variation is something you can easliy adjust while sailing on a beat. The "Gust Adjust" creates the ability to modify your rig while on the water, even sailing to windward.

    I will look into the other variation.
     
  14. derekcjackson

    derekcjackson Member

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    I am pretty sure that the two variants of the jens rig (gust adjust and the one that originated from Bill McInnis) are essentially identical in their capabilities. The ability to add or remove the jens upwind while sailing depends more on how the lines are secured to your boat (bull horn vs clam vs another style cleat) and whether there are purchases or other complexities on those lines to increase tension.

    The biggest difference I am aware of is that because the jens line is separate from the halyard in the gust adjust, a sailor on any given day can easily decide to not rig the boat with a gust adjust jens available. The double length halyard does not easily give you that option. You basically have to own a second normal length halyard and remove all lines from your spar.

    Finally, the gust adjust jens variant has been seen by the class measurer and ruled compliant with the class rules. While the other version seems to be equally as compliant, no such official decision has been made. With Bill's help, I have sent some information and pictures to the appropriate parties to look at.
     
  15. fbjru

    fbjru Member

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    I agree, both have essentially the same parts and do the same thing. The difference is only in what line serves two jobs.

    I see several advantages in the version originated by Bill McInnis. First, it is easier and quicker to tie, because practically the entire thing can be tied once and left alone when rigging and derigging. This makes it easier to replicate with exactly the same results each time. Also,the set up is much simplier and cleaner. Finally, cleating the "two" halyards off and making a vang seems like it would be easier done with two tag ends instead of having to cleat off in the middle of the line.

    As mentioned there is the disadvantage of always having the rig tied and not being able to easily revert to one halyard. However, it would be no dissadvantage to have the rig tied in and not used when the wind is light. It is better to be sorry than safe and you may be glad to have it if wind picks up. That is the beauty of this rig.

    It will be interesting to see who uses what in NA's this summer. I predict we will see both and alot of talk. I seem to favor Bill McInnis's, but wont be using it unless it gets aproval. We saw what can happen with an unapproved rig in Erie last year.
     
  16. derekcjackson

    derekcjackson Member

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    I must have missed that. What happened in Erie last year with an "unapproved rig"?
     
  17. fbjru

    fbjru Member

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    Tony Collin's use of the "Gust Adjust" and his variation which was then dubbed the "Collin's Cleat" generated a lot of talk about legality and possiblity of DSQ. In the end his rig was modified and approved for the regatta and eventually for the class as a whole. Though it passed and became not too big of a deal I learned that I personally would not want to be in a position where I am using a rig of questionable legality.
     
  18. Shaun

    Shaun New Member

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    The "Gust Adjust" may be left on the rig during storage. Means rig once and then forget about it. Also, the way Greg uses it for on the fly switches from jens to full and back and also the vang is the most sophisticated way of tying his version. The Gust Adust can be just cleated off and then the main halyard used for the vang. If one decided to drop the main to a jens, it would just be harder to raise it back up to a full.
     
  19. Wavedancer

    Wavedancer Upside down? Staff Member

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    Shaun: Can you please post the recommended length and diameter of the two lines used in the Gust-adjust system?
     
  20. Shaun

    Shaun New Member

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    Both halyards I use are 30 feet (2 lines) Amsteel 3/16
     

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