Cox's Bay Skimmer

Discussion in 'Sailboats' started by Doug Lord, Jan 11, 2014.

  1. Doug Lord
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    Doug Lord Flight Ready

    I like the reverse bow! Would he be receptive to a less radical reverse bow like this on the Crossbow below?
    click-
     

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  2. petereng
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    Location: Gold Coast Australia

    petereng Senior Member

    Hi Doug,
    If some sort of Rm enhancment is what we are looking for, take the Quant 28 . Why don't we just have Tee foils hanging down from the racks? When the boat is heeled they are in the water doing their job, when out they are in air not creating much drag? Is the DSS a system designed to get around the rules? rather than being a simple stabilty improvment device? Its really not in the KISS catagory any thing that has to move through a case like that is a pain to build and a pain to get to work right. Cheers Peter s
     
    Last edited: Mar 22, 2014
  3. Doug Lord
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    Location: Cocoa, Florida

    Doug Lord Flight Ready

    ==============
    Peter, I imagine t-foils would work but I'd think it would require a lot of strengthening of the racks? And since the racks are removable ,you'd have to be able to remove the racks and the t-foils.
    I don't think T-foils would be acceptable on WOXI or the new 100 foot DSS boat or the 50' semi cruiser with DSS-all of which don't have racks.
    And on my little experimental Crossbow fl racks would be unacceptable as would T-foils. There are different ways DSS has been done-the across the boat trunk, the dual "centerboard" trunks like on the Quant 30, or the plug-in trunks designed into my little boat.
    I think from a structural and appearance standpoint T-foils wouldn't be as elegant as the current DSS solutions but there's always room for experimentation.
     
  4. Blackburn
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    Blackburn Senior Member

    ^^




    (copy and paste the video's YouTube ID, which is only the part that follows the equal sign)

    ;)
     
  5. Doug Lord
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    Location: Cocoa, Florida

    Doug Lord Flight Ready

    Skimmer

    Thanks Gary and Blackburn-looks great but more,more!
     
  6. Gary Baigent
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    Gary Baigent Senior Member

  7. Doug Lord
    Joined: May 2009
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    Location: Cocoa, Florida

    Doug Lord Flight Ready

    Skimmer

    You bad-18 seconds!? Great,of course.....
     
  8. Gary Baigent
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    Gary Baigent Senior Member

    Promise longer sequences now that I've figured out (and thanks to local punters) earlier problems.
     
  9. Tom.151
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    Location: New England, USA

    Tom.151 Senior Member

    Perhaps you ( and BB :) ) should start a thread (together).
     
  10. Tom.151
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    Location: New England, USA

    Tom.151 Senior Member

    Gary
    Here's what's been on my mind since I first saw your Skimmer...

    The J7 design by Ross Turner ( http://jarcatmarine.com/ ) is reputed to be fast and very close winded - as your experience parallels.

    One of the boats (two were built for sure, and raced well) was assembled with a pair of Tornado (cat) rigs -- which might be usable for a quick-start to a Skimmer-type skiff for those interested.

    If memory serves... the J7 which had Ross's wingmasts was the real performer.

    For me, the freestanding rig of CB-Skimmer is the preferred ticket for an un-ballasted (okay, maybe water ballast) skiff.

    I initially had qualms about reputed "interference" on such a rig - yet the experience of the J7 owner, and now you on the CB-Skimmer, teach us we're missing something. When I think about what we all learned from the wing-sail AC boats recently - perhaps there's some related interaction/effect going on with the J7 and CB-Skimmer type rigs. Their rigs may be moving in that general direction. Maybe the sail planform being more "square" is part of what's paying unexpected dividends.

    That would all be a hoot, wouldn't it?

    I'll second Doug's motion -- more video !!! Including pics of the upwind compass course(s) before and after tacking.

    Thanks as usual for the generosity of your continuing contributions here and elsewhere,
    TomH
     

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  11. Skyak
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    Skyak Senior Member

    Interference is real. The dynamics are well understood and there is a performance challenge up wind (and if your boat is really fast everything is upwind). But there are other conditions and other limitations. With wind on the beam a boat with two efficient tandem sails will be very fast and the details of the sailplan might favor the schooner compared to a single tall sail that must be reefed.

    In the end does it mater that another configuration is better theoretically windward/leeward? A boat that sails fast and is easy to build and handle should be judged great based on what it is, not what it could be.
     
  12. Tom.151
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    Tom.151 Senior Member

    You missed the point completely. Of course interference is real. The multi-element AC wings depend on it. And are hardly 'challenged' upwind.
     
  13. Gary Baigent
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    Gary Baigent Senior Member

    Sailing yesterday, tiny zephyrs, mostly mirror flat for an hour, then beautiful North easterly arrived and we were placed well to get it first, ahem; hence we unmercifully crushed the opposition.
     

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  14. Doug Lord
    Joined: May 2009
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    Location: Cocoa, Florida

    Doug Lord Flight Ready

    Skimmer

    =============
    Cool ,but where's the one hour video?!
     

  15. Gary Baigent
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    Gary Baigent Senior Member

    Cox's Bay Skimmer DreadO on cradle which saved the light boat's life when the cyclone arrived here because the seas were smashing directly into this corner - which looks very peaceful now but different story then. That's me in Eric E's new secondhand kayak. Have been trying to convince him to buy a Newick Tremolino hull plus Hobie floats that is up harbour lying under a house.
     

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