Sailing outrigger canoe

Discussion in 'Multihulls' started by Michael Farmer, Aug 23, 2021.

  1. fallguy
    Joined: Dec 2016
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    fallguy Senior Member

    I did not refer to tacking anywhere in my post. I have made it very clear on this forum that I am not a sailor and I never pretend to be..

    I did reference what happens in my boat under a heavy shock load. The rubbers will give a bit.

    And if you watch the Marshallese boats, their systems are not rigid is all.
     
  2. garydierking
    Joined: Sep 2004
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    Location: New Zealand

    garydierking Senior Member

    The flexible ama connection on Adrenalin, the Gougeon brother's racing trimaran.
    [​IMG]
     
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  3. Michael Farmer
    Joined: Aug 2021
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    Michael Farmer Junior Member

    Reply to Peter Australia post No, no, no post

    Thanks for the reply I'll check out your link. I have no practical experience of sailing proas, but I do understand how they make too windward by shunting. As for flexibility in the cross beams causing the leeward ama to sink deeper, I just can't see this, you say yourself it needs to rise with the wave, surely it would only cause a slight delay before applying this force to the main hull depend on the amount of flexibility designed into the cross beam. In any case, surely in a small outrigger sailing canoe, the idea is to fly the ama where possible or at least keep it lightly loaded on either tack by using crew weight, only using the ama displacement or weight at slow speed or when stationary, as suits the case
     
  4. Michael Farmer
    Joined: Aug 2021
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    Michael Farmer Junior Member

    Thanks for the post Garry

    That looks extream! way more tech than my simple aplication, although it seems to agree with my thoughts

    Youre Va'a Motu design is more in keeping with what I have in mind.............................Michael
     
  5. peterAustralia
    Joined: Mar 2006
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    peterAustralia Senior Member

    My response was intended for Michael Farmer, not fallguy. Often there is a long thread, and the reader skims through it, and exact details of who wrote exactly what in each post are often overlooked. The below link is to the much larger facebook group, this is the first group, that has both shunting and tacking types. It has about 1000 members, versus the newer smaller one with about 20
    Facebook Groups https://www.facebook.com/groups/232685430734678/
     
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  6. Keern Haslem
    Joined: Sep 2023
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    Location: Montana, USA

    Keern Haslem New Member

    Hi Gary, I’ve followed the method from your book, for lashing my ama to my iakos. The ama is complete and the only carpentry left is the iakos. I have 8’ lumber cut to thickness and ready to assemble. I’m eager to get on the water before winter hits. However, I worry that shorter than specified iakos (10’8”) will be detrimental in the long run. Winds east of the Rockies, in Montana, are steady and my main section is 16’ long. Would I regret making my iakos only 8’ long?
     
  7. garydierking
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    garydierking Senior Member

    Which design are you building? Generally speaking, 8' should be enough. If you decide to add a safety ama on the other side at some point, you can overlap and lash a short length of iako for the other side. I did that on my Ulua.
     
  8. Keern Haslem
    Joined: Sep 2023
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    Location: Montana, USA

    Keern Haslem New Member

    Oh interesting! I thought to build two longer iakos when I build the center section (which may not be until next year) then yoke them together, for a four iako system. I hadn’t considered counterbalancing. I’m building a shunting wa’pa. Because the water gets only so rough in Montana and the prevailing winds are pretty consistent. On my side of the Rockies, in the plains.
     
  9. garydierking
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    Location: New Zealand

    garydierking Senior Member

    It is optional to mount the leeboard on the main hull or the ama. If you mount it on the ama there is a small modification to the mount from what is shown in the book.[​IMG]
     

  10. Keern Haslem
    Joined: Sep 2023
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    Location: Montana, USA

    Keern Haslem New Member

    Hi Gary, sorry for the delayed response. I tried to figure out a way to build the mounts described in your above diagram. But since I had already constructed, drilled out and varnished the oak verticals on my ama I was unable to figure a way to incorporate a solid, aluminum diagonal. I did happen upon an idea with some aluminum legs from an old army cot, which both provided added length for my iakos and also shear strength imo. The oak dowels are fiberglassed into the ends of the aluminum legs and the legs are lashed to the ends of the iakos. This solved another challenge, since my drill was not substantial enough to core out the end of the iakos. The only real downside is the additional lashing I must do. However, the length of the iakos allows me to transport all of my spars inside my sedan, in the run from the trunk through the central compartment, for long transports. (I also segmented my spars in 8 foot [2.4m] sections.) Many thanks for your help. The idea of incorporating aluminum sections was integral to finding a solution.
     
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