CNC Plans not Included

Discussion in 'Multihulls' started by jorgepease, Sep 19, 2016.

  1. groper
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    groper Senior Member

    I know where your going with that :) its jorge youd have to convince not me is all i will say :)
     
  2. jorgepease
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    jorgepease Senior Member

    Explain it to me!!!
     
  3. UpOnStands
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    UpOnStands Senior Member

    For Rob, heading down the proa road again?

    Unstayed, rotating, CRF masts on a catamaran with no headsails. Not sure I agree with the "must be strong enough to capsize the boat" mantra.
    As to what is a workable design alternative is the 64$ question.
     
  4. groper
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    groper Senior Member

    Yes a proa...

    Rob- i know what the twin wing mast rigs cost. They spent alot more than i did rigging their shionnings with a similar power rig. Comparing your unstayed proas to these unstayed cats isnt apples to apples.

    Honestly i think there is nothing wrong with robs proas and i quite like them on their merits. If you like the idea then go for it. But obviously they dont suit everyones tastes and that can be due to something as simple as their assymetric aesthetics.

    The sailrocket guy paul larson sounds like his next project might be a huge foiling proa- he has said its assymetric which may be a clue, and rob has also been considering the foiling proa idea (talking to paul- rob?) probably with a tilt wing rig or such like , who knows- i dont think even larson does. I saw heaps of sailou canoes (proas) up in PNG - they go pretty quick with an old tarp for a sail despite being super heavy made of hollowed out logs... works for them for +600 years :)
     
  5. jorgepease
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    jorgepease Senior Member

    Last edited: Jul 11, 2017
  6. UpOnStands
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    UpOnStands Senior Member

    Jorge, do you intend to sail hard enough to start lifting one hull?
     
  7. jorgepease
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    jorgepease Senior Member

    I might do that by mistake :eek: lol

    Going fast sometimes for short periods and for fun is not a negative but I mostly just want to be able to sail in light winds and upwind, I don't want a motor sailer. If that means I have to keep the boat super light and have a really tall rig that could fly a hull then ok but it's not my goal.
     
  8. groper
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    groper Senior Member

    Then you need a rig with a high lift to drag ratio and a boat with a high power to weight ratio and minimum windage (air drag)

    Its as simple as that...
     
  9. UpOnStands
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    UpOnStands Senior Member

    Not jorge's intention to go fast. OK, then that is one design point settled.
     
  10. jorgepease
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    jorgepease Senior Member

    Yes, this is not a racing boat but since I will be about 20 tons lighter than a Lagoon and 5 tons lighter than a Gunboat, I think it's going to be perfect. I will do whatever I need to, to strip weight, but I really want the engineers to do that.

    I figured out the helm and I like it!!!! It's not a flybridge but it's more than an elevated helm, it's the EB! Elevated Bridge! :) ... and the dingy fits below. I know what you will say, weight on the stern, but there isn't much too it and now I have those bi rigs forward of center which worry me a bit.

    RNDR134.jpg RNDR135.jpg RNDR136.jpg
     
  11. UpOnStands
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    UpOnStands Senior Member

    Looks heavy and uncomfortable. Trying to watch over that vast expanse of solar panels :confused:. Different strokes for different folks but all that glass seems far from beautiful to me.
    Put your full helm with manual backup under the roof and lose the cantilevered cockpit. Design so you can helm for long periods out of foul weather.
    For the good weather times, put wire connection to the hydraulics and engine controls in a simple single helm chair sitting just aft of leading edge of the roof - lose one solar panel. Sliding roof hatch overhead.
     
    Last edited: Jul 11, 2017
  12. jorgepease
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    jorgepease Senior Member

    Ok here it is from my perspective.

    We have been saying that 99% of the time you aren't at the helm so let's not - now - say that we are tied to the wheel lol ))))

    It's just another niche to curl up in and of course it would have back cushions and be as comfy as any other sofa. I think that spot would probably be more used at anchor, a glass of wine under the stars, or a coffee early morning before the sun heats up.

    In foul weather or when I feel I should be at the helm, I would have a popup bimini like some of the other cruisers do.

    And it doesn't add much weight over the regular davits... I suspect maybe 50 more pounds. I blew off the swim platform because that is extra weight that isn't really needed. A fancy inflatable swim mattress will work fine.

    It also breaks up the bulky outline of my roof which is so ELECTRIC looking.

    From a functionality perspective, when you are setting up the sails and getting ready to go to autopilot, the lines are right there and not somewhere where I don't want them to be, namely in the living space next to the galley.

    I shorten my direct drive transmission by 30 feet. I don't want hydraulic, too many negative remarks about it.

    Good view of the stern when backing into a marina though that is not really an issue as I could have double stations for the drives.

    Yeah it all boils down to different strokes for diff folks
     
  13. UpOnStands
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    UpOnStands Senior Member

    "We have been saying that 99% of the time you aren't at the helm so let's not - now - say that we are tied to the wheel lol ))))"
    That 1% can hang around and really mess you up. :eek:
     
  14. jorgepease
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    jorgepease Senior Member

    Aint that so often the case !!

    One thing that has been on my mind ... how often do you use your tender for long distance exploring?

    Edit - Bimini would be completely out of the way until you needed it and would have sidewalls.
    RNDR137.jpg
     

  15. UpOnStands
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    UpOnStands Senior Member

    Can you make a fwd view from behind the wheel at eye ball height?
     
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