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Intro [2 Attachments]


 

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Bernd:
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??? What I was not understanding is that the wishbone and gaff are permanently attached at the masthead.?? Your photo clearly shows this to be the case, and also shows the sail furled to the mast, rather than the usual? method of furling to the boom on a mainsail.?? The wishbone & gaff here are clearly stayed so that they cannot swing as the boom swings, which would seem to enforce a twist.? The head of the sail is obviously drawn out to the wishbone by a control line through a block, and I would assume this line to be pretty important in controlling sail twist.?? The wishbone / gaff combination is similar to a jib crane arrangement, and clearly the wishbone allows for the head of the sail to be slacked a bit to come at least partially in line with the boom.?? I'd love to see this rig sailing in real life.?? I can only imagine the mess if the furler jammed and failed to work, but that's never pretty, and invariably happens at the most inopportune moment.?? Another question that comes to mind is how is a sail cover installed?

??? I also live in a very remote small town with a current population of 7 people, and the same number of dogs.?? Fortunately for us, a main fiber optic cable passes through here, and we have a telephone exchange sitting right on it, and so have superb internet.??? The biggest problem here is extremely unreliable electricity with outages ranging from 12 hours to 24 hours much more common than they should be.?

??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? H.W.


On 11/27/2017 07:40 AM, Bernd Kohler Bernd@... [k-designs] wrote:

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Hi

Funny, I posted the wrong picture from the Ljunstr?m rig, the intentoin was to post this one. I did it of course for obviouse reasons, to show the difference in design approach. I think Pete used this extreme low aspect ratio because of his experience with "China Moon" whit which he was very far down to the South (below 50¡ã) and the weather conditions there.
Okay to the wishbone rig. As attachment a picture of a wishbone rig on an ECO 75. Here you can see more details. The owner was afraid of the boat. To fast for his liking ?and he gave it away for $ 7800,-!
I have no sailing pictures or a video of the Pelican under sail, not even one! An other time, I had a mobile phone with a weight of 8 kgs. We are now back at 1997 or so. Als I sold the Pelican there where no videos. By the way, in this time you meed some other sailors some where sai in the Aegeis sailing to Istanbul and we back perhaps to Denia (Spain). Sometimes, for a good sip and chat where to go next and never meed them again. I have a lot of pictures from others boats and the will have them from the Pelican. The never got there photos, or I mine. It was the end of the time "bumming" around on boats for almost nothing. We where not interested in videos or photos, we where living our dream of freedome. A long storry for nothing; I know, so, besides this photo, I can show you nothing. I have a complete plan a wishbone rig which I sell as an extra. For good measure I add also an illustration ofte KD 860 wittis rig.?

Cheers
Bernd?

NB.: I life relative far away from the sillivication (no mistake) in a hamlet with now 19 inhabitants. So when I do not answer quick, my slow or many times not working Internetconnection is the reason.



Von: "StoneTool owly@... [k-designs]"
An: k-designs@...
Gesendet: 18:54 Sonntag, 26.November 2017
Betreff: Re: [k-designs] Re: Intro

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Bernd:

??? I know the first rig well.... It's Arne's boat Johanna with his cambered junk rig, The second (Dobra Kusa) I believe is a Ljungstr?m rig, though the photo doesn't really show it to best effect with it's double loose footed sails furled about a rotating mast..... A very interesting rig. ? Your photo of Pete's final, or at least third iteration on Oryx, shows great detail of how he built his version of Paul McKay's Aerojunk rig.? I've felt since I first saw photos of Oryx that the aspect ratio was a bit too low, nor could I understand why one would truncate the upper panel, except perhaps to serve as storm canvas, though there are other ways this could be done.?? The beauty of this system is that a nicely cambered sail can be achieved using absolutely flat sailcloth, and the batten system is simple and very strong.? A rugged, and very "field serviceable" rig.? When people comment about windage or drag, one has only to point the veritable birds nest of standing rigging on most Bermuda rigs, and the liabilities it often poses when setting sails and tacking, and that without mentioning the veritable house of cards with dozens of possible points of failure, any of which can bring the whole thing toppling down.?


alt
Ljungstr?m rig

??? I'd love to see a video of your wishbone gaff rig in operation...... I have difficulty really understanding the details of it from the few photos I can find.?? I've read most of your work that is to be found on the Duckworks website, all of which is quite worthwhile reading, and contains some valuable insights.?? I have a passion for innovative, original, and outside the box thinking.?? It's what drives progress forward.?? Sometimes things that didn't work out well are of as much value as things that did, as far as what can be learned from them.?? Your own work only came to my attention through Oryx, and shows the kind of innovative outside the box thinking, good choices, and great flexibility of thought that I've always admired.???


??????????????????????????????????????????????????????????? H.W.


On 11/26/2017 06:49 AM, Bernd@... [k-designs] wrote:
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?You are rigth, it was not necessary to go into the junk rig details. I am also a memberfrom the Junk Rig Assication. Because there are intersting developments. I like special some of the Norwegian boats with there beautiful champerd sails. I hope also that the discussion was, besides for you, helpful. Thanks for all the contriputions from the others. At last here two pictures from complete different rigs to make my point in this respect.?

Cheers

Bernd





 

H.W.

On the Pelican we had a sort of gooseneck fitting to control the twist. On the KD 860 and the ECO 75 the mast rotates to control the twist. Yes there are also control lines to control the wishbone. This is in both version enough to control the twist in the sail. Because we use no Aluminum profile over the stay, the sail can be lowered like any normal main sail. In all the years we have had never a furler failure. I see no reason why the furler should jam. This problem from jamming mainsails is a problem when you have to roll the sail inside the mast. Then the mostly full cut main sail jams in the middle (because to much material form in this region) and yes, you have a problem. Multihulls have anyway less problems, because the corde to depth of a monohull main is normally 6 to 8 %, wheres 4 % is the maximum for fast multihulls. For a cover you can have a sleeve with a long zipper which you can set when the sail is furled.

Lucky you with a fast Internet. If there is some wind, and it is a region with much wind power failure is also a very common occurence here.?

Bernd