Wing-drive

Discussion in 'Sailboats' started by Kjell Dahlberg, Feb 27, 2005.

  1. kjell
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    kjell Senior Member

    My WING-DRIVE is not made for racing. It is an alternative for safety sailing.
     
  2. CT 249
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    CT 249 Senior Member

    Yes, but does that mean that the rig has to be mounted well above head level?
     
  3. kjell
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    kjell Senior Member

    The Wing-Drive is remote controlled from the cockpit there is no need to be on deck.You can se there are plenty of safety deck space.
     

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  4. CT 249
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    CT 249 Senior Member

    We seem to be going around in circles.....

    In the left-hand drawing in your previous post, how do I paint or work on the deck without getting struck by the bottom of the rig as it spins around, if I am in my marina berth in a strong and fluky wind?

    IF the rig is free to swing around on the boat in the left hand pic, no one can use some of the most valuable parts of the deck space (the bit in the middle of the boat) without potentially being hit by the rig as it swings around to follow the breeze.

    In the right hand drawing, how does the proa come alongside a dock or raft up alongside another boat? Anything in the circle swept by the rig could be hit by the bottom of the rig.

    What happens in the proa if I want to walk to the stern of the long hull to attend to a dock line, put on a fender, do some painting, whatever? The rig is free to swing around and hit me in the head.

    These are NOT problems with a conventional rig because I can simply drop the sails and secure the boom in a fixed position. They are also not a problem with a conventional rig because the area swept by the boom is controlled by the amount of sheet that is let out.

    Move the figure in the right-hand drawing to the left so that the figure is standing near the mast; perhaps to moor the boat, work on the mast bearing, whatever. What happens if the wind changes while he is doing this? Do you just hope that he can duck quickly?
     
  5. kjell
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    kjell Senior Member

    Wing-Drive with spi.
     

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    Last edited: Sep 29, 2013
  6. Kimba09
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    Kimba09 Junior Member

    its a matter of design of where wingsails can swing and the danger areas. About 8 yrs ago, made a 1/12 scale working , radio controlled model of a 42 Ft 4 wingsailed cat. The decks were all "safe areas" and the roof had 4 ft clearance for ppl to sit if they wished. To me converting conventional yachts is missing out some of the features. So the bimaran am now building will take advantage of the wingsail capabilities better. It too tho is an experiment, so there will be new info once we start testing.
    It is really hard for ppl who haven't sailed with a wingsail rig to understand all their features. Kjell and I eve tho on other sides of the world have and am happy to say he has helped me. Hopefully can do the same for him too.
    Still having had old sailors and boat builders on my boats there has been nothing but praise for these systems. the tracking ability of Kjells and my designs are incredible.
     
  7. Kimba09
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    Kimba09 Junior Member

    I have sailed and also left a small 16ft tri fend for itself on a dam in gale force winds for 3 days. the Wingsails feathered perfectly, no trouble at all. Also because a wingsail is very low drag, about 1/10th that of a round mast, let alone the rigging there is much less heeling from gusts at anchor. The "Soft wingsail option I think would have many areas to go wrong if trying to lower in a big wind. Putting Kjells or my rig into neutral is a finger task to change the control.
     
  8. Kimba09
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    Kimba09 Junior Member

    If you like I can send you a copy of a video of my old tri, made about7 yrs ago, and it does take longer than a mnute to explain sailing, my email address is wingsails at yahoo.com
     
  9. kjell
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    kjell Senior Member

    I would like to have the opinión about wing sails by a person that have been sailing with one.
    It seams that some think that the wings are rotating 360ª like a propeller, hitting everbody.
     
  10. Kimba09
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    Kimba09 Junior Member

    actually Kjell, have had 3 major hits with a boom but nothing yet from the wingsail. But then with the wing you just sit and steer , even the biplane rigged cat had both tails connected to the tiller, like an outboard motor control.
     
  11. kjell
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    kjell Senior Member

    You and I know how easy and safe it is to navigate with wing sails. The only negative part is when going down winds (Running) The Wings are made to receive the wind from any other directions. To resolve this negative part, I designed a Spinnaker for the Wing-Drive.
     

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  12. Kimba09
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    Kimba09 Junior Member

    Good idea Kijell, but i have found that the wingsail is no problem downwind, it can go whatever side you turn in from, and face it, absolutely nothing compares to how easy it is to gybe, I always say to my passengers "preparing to gybe , this can be tricky", they say ok let us know when and I have the joy to tell them its already happened, hahaha
     
  13. kjell
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    kjell Senior Member

    My first RC Wing Sail Model. Based on Walker Wing sail design.
     

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  14. kjell
    Joined: Aug 2005
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    kjell Senior Member

    New WING-DRIVE.
     

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