Jock Burroughs self steering

  • 16 Jan 2018 10:20
    Reply # 5685158 on 5647793

    There are some YouTube videos about the Hebridean. Here's a link to one of them

    https://www.youtube.com/watch?v=kkT27vR6yoM

    And a some blog entries starting here

    https://tammynorie.wordpress.com/2015/07/12/building-the-hebridean-wind-vane-self-steering/

    Hope that helps

  • 30 Dec 2017 19:57
    Reply # 5653562 on 5647793

    Very helpful, thank you..

  • 30 Dec 2017 18:53
    Reply # 5653531 on 5647793

    There was some discussion in "A vane gear for Weaverbird" . And a photo album is here.

  • 30 Dec 2017 18:22
    Reply # 5653516 on 5653284
    David Tyler wrote:

    See the arrangement of my current gear here.

    Do you have more pictures and explanations of your Hebridean vane somewhere, please? It seems to have some interesting differences compared to the original.


  • 30 Dec 2017 16:10
    Reply # 5653391 on 5647793

    Correct, Arne. In fact, it's perfectly possible to design a gear either way around, but I prefer to have the two primary linkage lines this way around so that on a dead run, or running by the lee, they are not going to rub against each other.

    A pushrod and crank primary linkage takes rather more engineering to make, and to get the weights balanced up properly, whereas the small Dyneema lines used as a primary linkage are easy - especially now that I've found that the Barton and Antal rings are all that is needed to change direction, no sheave required.

  • 30 Dec 2017 15:52
    Reply # 5653383 on 5647793
    Anonymous member (Administrator)

    Interesting, David

    Does that mean that you can gybe the boat with the windvane, but have to «gybe the vane» around each time you tack?

    The one and only vane I have made (OGT Mk 2) could tack the boat easily, but had to be swung around when gybing the boat.

    I am pondering making a vane with a pushrod to let one rotate the turret with no limitations.

    Arne


  • 30 Dec 2017 13:23
    Reply # 5653284 on 5647793

    I have John Letcher's book, but not the AYRS publication.  It seems to me from figure 6-14 that there is a major disadvantage to Jock Burrough's arrangement, in that whenever the course is adjusted, the lines to the tiller must be adjusted as well. This would appear to make it difficult to get the boat to settle onto the required course accurately and quickly. The arrangement in 6-11 is better but is still not very usable. A better arrangement for a running line gear is shown in Bill Belcher's book, page 104 - 106, and I have used a similar vane successfully, albeit with an angle of inclination on the vane axis, of 15 degrees or so. Photos here. Better still is to discard the single, central sheave immediately under the vane drum, and lead the linkage lines directly down to a turning point that is far enough below the vane drum that the angle between the two parts of the line is quite small. Then the vane turret can be rotated through 300 degrees without unduly changing the tautness of the lines, leaving unusable only the head-to-wind sector. See the arrangement of my current gear here.

  • 24 Dec 2017 22:06
    Message # 5647793

    I first came across the self steering design by Jock Burroughs in Letcher's "Self Steering" and more recently in the AYRS original "Self Steering".  Letcher showed Jock's earlier version and the AYRS publication showed three models.

    I like this design as it would seem to fit my situation, and I could fabricate it.  But, not being a fan of reinventing the wheel, I am hoping that someone here might have built a version or knows of someone who has. 

    I would be asking this on the AYRS forum, but am having issues getting registered.  And, I would be putting it on a JR rigged Haida 26.

    Any assistance will be appreciated.  

    Stephen in British Columbia





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