New small Multi from Icarus

Discussion in 'Multihulls' started by Manfred.pech, May 31, 2016.

  1. ElGringo
    Joined: Mar 2014
    Posts: 203
    Likes: 4, Points: 18, Legacy Rep: 48
    Location: Amarillo Texas

    ElGringo Senior Member

    Manfred, what is your 1st language? Those of you who speak multiple languages have an advantage when it comes to finding good information.
     
  2. Manfred.pech
    Joined: Apr 2010
    Posts: 599
    Likes: 82, Points: 28, Legacy Rep: 319
    Location: EU

    Manfred.pech Senior Member

    German, but my most important language is MULTIHULLS.
     
  3. ElGringo
    Joined: Mar 2014
    Posts: 203
    Likes: 4, Points: 18, Legacy Rep: 48
    Location: Amarillo Texas

    ElGringo Senior Member

    I can understand that. It is very contagious.

    I spent a little over two years in Schweinfurt.
     
  4. Manfred.pech
    Joined: Apr 2010
    Posts: 599
    Likes: 82, Points: 28, Legacy Rep: 319
    Location: EU

    Manfred.pech Senior Member

    Hope you had a good time there.
     
  5. ElGringo
    Joined: Mar 2014
    Posts: 203
    Likes: 4, Points: 18, Legacy Rep: 48
    Location: Amarillo Texas

    ElGringo Senior Member

  6. upchurchmr
    Joined: Feb 2011
    Posts: 3,249
    Likes: 234, Points: 63, Legacy Rep: 579
    Location: Ft. Worth, Tx, USA

    upchurchmr Senior Member

    It's a pity I don't do Facebook.
     
  7. Manfred.pech
    Joined: Apr 2010
    Posts: 599
    Likes: 82, Points: 28, Legacy Rep: 319
    Location: EU

    Manfred.pech Senior Member

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]



    Not much new: troughs for the beams, daggerboard and a hatch for the cabin.
     
  8. oldsailor7
    Joined: May 2008
    Posts: 2,097
    Likes: 41, Points: 48, Legacy Rep: 436
    Location: Sydney Australia

    oldsailor7 Senior Member

    It's not that it is not efficient because it's not a normal sloop. It is inefficient in that, in that rig, the sail is only fully efficient on one tack due to the interference of the boom against the mast. I learned to sail on a Sunfish back in 1958, so I know this from personal experience. :eek:
     
  9. ElGringo
    Joined: Mar 2014
    Posts: 203
    Likes: 4, Points: 18, Legacy Rep: 48
    Location: Amarillo Texas

    ElGringo Senior Member

    OldSailer, I have never sailed a boat and never been around sail boats, so I'm asking because I don't know. I know the mast is vertical but I thought the boom was the horizontal part that swings around to keep the bottom of the sail stretched out. Is the part shown at an angle in the drawing of the complete boat also a boom? Can it go on either side of the mast? I can see in the picture that it would lay against the mast depending on the wind direction.
     
  10. Richard Woods
    Joined: Jun 2006
    Posts: 2,209
    Likes: 171, Points: 63, Legacy Rep: 1244
    Location: Back full time in the UK

    Richard Woods Woods Designs

    I raced a Sunfish last winter for the first time. It is noticeably slower on one tack than the other. The boat is fastest with more sail aft of the mast. But it is then harder to sail, especially in any wind. So most Sunfish sailors move the gooseneck fore/aft from say 16in-24in to help balance the boat.

    A low aspect ratio sail is always less efficient to windward than a higher aspect sail

    I suggest you compare the Laser and Sunfish. Both roughly the same with, length, sail area. Built by the same builder (in the US) and both have over 200,000 built.

    Also check out the Super Sunfish which used the same hull but has a smaller, conventional bermudian rig. It is the faster boat

    Richard Woods of Woods Designs

    www.sailingcatamarans.om
     
  11. Clarkey
    Joined: Aug 2010
    Posts: 142
    Likes: 23, Points: 18, Legacy Rep: 10
    Location: UK

    Clarkey Senior Member

    It is going to be fascinating to see how this works out balance-wise, especially with the rig in the relatively unladen hull.
     
  12. upchurchmr
    Joined: Feb 2011
    Posts: 3,249
    Likes: 234, Points: 63, Legacy Rep: 579
    Location: Ft. Worth, Tx, USA

    upchurchmr Senior Member

    This has been done in a similar manner.
    You might want to review this website: http://harryproa.com/
     
  13. ElGringo
    Joined: Mar 2014
    Posts: 203
    Likes: 4, Points: 18, Legacy Rep: 48
    Location: Amarillo Texas

    ElGringo Senior Member

    OK....the gooseneck... fore/aft to balance the boat... I think this might be why I have a 16 foot Lonestar aluminum boat with a 20hp outboard.
     
    1 person likes this.
  14. Manfred.pech
    Joined: Apr 2010
    Posts: 599
    Likes: 82, Points: 28, Legacy Rep: 319
    Location: EU

    Manfred.pech Senior Member

    I do not think, that it is useful, to copy the sails from Sunfish or SuperSunfish. These fit for the famous Sunfish and have their special system of fittings which are in my opinion (unreasonalble) expensive -- besides of their merits.

    http://www.sunfishdirect.com/store/index.php?route=product/category&path=3




    Years ago, when I read of the extraordinary merits of the CrabClaw sail I started to build a boat to test such a sail and I made a model to develop a sheeting system to have the sail always leewards of the mast. I found a simple system with an endless sheet, an eyebolt at the bow and a cleat --or two.

    May be Mr. Bernhard Köhler will devolop his own sheeting arrangement without reducing the performance of his sail design.
     

  15. Clarkey
    Joined: Aug 2010
    Posts: 142
    Likes: 23, Points: 18, Legacy Rep: 10
    Location: UK

    Clarkey Senior Member

    True but it isn't quite the same - at least with the harryproa things will be the same on each tack and the shunting maneuver doesn't need the bows or sterns to come through the wind. Seeing how this new arrangement tacks, gybes and balances will be very interesting especially as the layout allows for a useful mix of deck and cabin accommodation minimally affected by the rig and daggerboard.
     
Loading...
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.