Pete Hill's side-by-side/split junk catamaran 'Oryx'/Tabernacles

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  • 20 Jul 2014 16:34
    Reply # 3049154 on 1160890
    Deleted user

    Brief Q&A about ORYX, Pete Hill's junk-rigged catamaran. See end of blog post.

    http://junkoryx.blogspot.fr/2014/07/brazil-football-mania.html

    Last modified: 21 Jul 2014 12:07 | Deleted user
  • 23 Dec 2013 20:43
    Reply # 1462820 on 1160890
    Deleted user
    News of Pete's end-of-2013 whereabouts have come via David and Annie:

    "Here is wishing you a very Merry Christmas and good sailing in 2014. We have just arrived in Paysandu, up the Rio Uruguay and will spend Christmas here.... (snip). Check out  tacking-outrigger.com and James Brett's website (he is a New Zealander)."

    The first link is a mosaic of proa images, each of which links to more, and one of them links to a junk rigged Baltic proa that we've reported before. The second links to a proa design site, some of which use junk rig.
  • 20 Feb 2013 23:03
    Reply # 1216652 on 1160890
    Deleted user
    Bernd Kohler who designed Oryx  has added a link to our site from his.
    Last modified: 20 Feb 2013 23:07 | Deleted user
  • 04 Feb 2013 15:48
    Reply # 1198004 on 1160890
    Deleted user
    Webmaster Edit: Moved from Issue 61 and Pete's Catamatan' post]

    Karlis K wrote:

    I have a technical query about Pete Hill's tabernacle design,
    the photo of Speedwell's tabernacle on page 32 does not match
    the technical drawing on page 33. The drawing does not have the
    box foot taper evident in the photo. I'm curious about the
    taper details. Is the foot tapered in two dimensions (square
    foot) or one (rectangular foot)? Are the box stave lengths bent
    or scarfed together with a angle?

    David Tyler replied:

    I don't think there's a hard and fast rule about this. As Pete
    says, he builds a mast first, and then builds a tabernacle to
    suit it. I would guess that he tapered Speedwell's tabernacle
    to reduce its bulk below, and to get it to land on the top of
    the keel neatly. Such thick wood would have to be steamed to
    bend it, I think, though maybe a powerful clamp is enough to
    pull the sides in. There's nothing to pull against, to pull the
    back into a curve. I'm not sure that scarphing is a good idea,
    I would rather have the sides and back running straight
    through. I've only made two small wooden tabernacles, for a
    dinghy and a dayboat, but from that experience, I would say to
    keep the sides parallel unless there's a good reason not to.

    Peter Scandling said:

    If you have a read of Shirley's website here, she explaiins
    that one side was tapered to allow easier access in the
    forepeak. There is a detailed piece about her boat refit on
    the site.
    Last modified: 04 Feb 2013 15:50 | Deleted user
  • 14 Jan 2013 17:01
    Reply # 1179481 on 1160890
    The hulls have a trapezoidal cross section and no box section. In the original design the anti vortex panels are on the inside. We have them also on our PELICAN. The leeway in low wind speeds is not worser as with any other boat, but when coming about picking up the course is very quick. Nice for handling in close quarters.

    Bernd
  • 12 Jan 2013 17:21
    Reply # 1178189 on 1160890
    The CLR from the KD 860 is at 4520 mm from the bow. I do not know the under water plane of the ORYX to give a qualified comment where the CLR of his boat is.

    Bernd Kohler
    K-designs



  • 12 Jan 2013 12:25
    Reply # 1178059 on 1160890
    Oryx is an interesting design, it has a box shaped section, with no keels.  There is a small winglet that sticks out sideways to help reduce leeway.  Pete was going to put this on the inner edges, not the outer as the Designer intended.  Apparently this does work,  though I do wonder how well in a lumpy sea with not much wind.  
    Mark
  • 11 Jan 2013 18:23
    Reply # 1177559 on 1160890
    I'm delighted to be able to tell you that Bernd Kohler, the designer of Oryx, has just joined us. Welcome, Bernd!
  • 11 Jan 2013 18:21
    Reply # 1177558 on 1177404
    Slieve McGalliard wrote:

    Hi Brian,

    Thanks for the link to the drawing. I'm sure the large swell would have been reported in the press, so I feel it must be a distorted photo. The reason I ask is that the battens look dostorted and the rig looks 'bent'. A picture can say a thousand words, but they may not be the intended words. The real question is, " what is the best way to build a split rig?"

    Cheers, Slieve

    Slieve,
    My best guess is that this photo was taken through flexible clear plastic, protecting a camera of short focal length, hence the distortion and fish-eye effect.
  • 11 Jan 2013 15:54
    Reply # 1177454 on 1177021
    Brian Kerslake wrote:There's a side elevation drawing here

    It doesn't show what's underwater.  Pete also has the option of leaving the rig as it is, making the rudders larger, and balancing them so that there is little load on the tiller.  That is how Hobie 14s and 16s are trimmed for racing: the mast is raked back until most of the lateral resistance comes from the rudders, but you can balance them so that you can steer with two fingers at all speeds.  It works better on the 14 because the boats have the same rudder blades, but they are relatively larger on the smaller boat.

    Regards

    Robert Biegler
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