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Thread: Houseboat Katamaran ECO62

  1. #1
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    Mar 2015
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    Default Houseboat Katamaran ECO62

    End of April this year I started the build of an ECO62 Houseboat Katamaran (Power), a Bernd Kohler Design http://www.duckworksbbs.com/product-p/bk-eco62h-id.htm . It is my first build and I didn't own a boat. I live in Berlin, Germany and in the last 4 years my wife and I were boating a few days with hired boats in the waters around Berlin and north east Germany.

    The ECO62 will have an electric drive only, probably outboard and some solar panels, because we don't like the noise of combustion motors.

    strbh.jpgstristem2.jpgk006.jpg
    Last edited by heimfried; 12-17-2017 at 06:42 PM.
    Gruß, Günter

  2. #2
    Join Date
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    Hyannis, MA, USA
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    Default Re: Houseboat Katamaran ECO62

    Nice detail shots but hard to figure what you're about without an overview. Perhaps you have plans you can photograph and load here. Not all plans, but basic accomodation and profile, maybe general construction plans.

    G'luck

  3. #3
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    Bournemouth UK
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    Default Re: Houseboat Katamaran ECO62

    Ian,

    I think it's this one.
    http://www.ikarus342000.com/ECO62hlayout.htm

    Nick

  4. #4
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    Default Re: Houseboat Katamaran ECO62

    Sorry, I added above a link to the boat plans.

    Nick, you are right.
    Gruß, Günter

  5. #5
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    Default Re: Houseboat Katamaran ECO62

    I started the build in my shop which is a former garage (which didn't see any car since over 20 years). This shop is hardly large enough to build one hull at a time. To assemble the boat I erected a tent in the garden in which I was building the bridge deck (6.2 m * 2.5 m).

    k001.jpgk002.jpg
    Gruß, Günter

  6. #6
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    Default Re: Houseboat Katamaran ECO62

    Nice. I didn't look if wind loading data is available. Particularly with a houseboat, I'd want some very exact stability and wind data. I have seen a houseboat rolled on its side at the dock and I've seen a catamaran cart wheeling across the bay in a good wind. If you're not at a dock but riding at anchor, is she better off tethered abeam or from the bow. You'll mostly be in protected water but it still is nice to know what sort of seas and winds are safe. Just want to know her limits.

    I very much admire the accomodation and the clever tuck-under for that double berth.

    Very practical. She may be the sort of boat that's nicer to look out from than to look upon but the right paint scheme should help emphasize her practical virtures and otherwise let her blend into the waterfront.

    Really lovely.

    G'luck

  7. #7
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    Default Re: Houseboat Katamaran ECO62

    Thank you, Ian.

    We will go only on sheltered inland waterways. Basic stability data I calculated by my own (until now without wind load): http://www.bootsphysik.de/booteco62.php (click button top right: "English")

    (Transverse) initial metacentric height is 4.4 m (estimated VCG 1.5 m from base plane = 0.9 m above bridge deck).
    Last edited by heimfried; 12-17-2017 at 06:12 PM.
    Gruß, Günter

  8. #8
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    Jun 2017
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    spicewood, texas, usa
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    Default Re: Houseboat Katamaran ECO62

    i like this idea. please keep up the posts and pics.

    jim

  9. #9
    Join Date
    Nov 2016
    Location
    honolulu,hawaii,usa
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    Default Re: Houseboat Katamaran ECO62

    Maybe you can omit some of the batteries if you add fittings for a backup yuloh oar:


  10. #10
    Join Date
    Apr 2009
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    Mountain lakes of Vermont
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    Default Re: Houseboat Katamaran ECO62

    Very nice. Your workmanship looks excellent. Will be following this build.
    I was born on a wooden boat that I built myself.

  11. #11
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    Default Re: Houseboat Katamaran ECO62

    Quote Originally Posted by Ian McColgin View Post
    [...] She may be the sort of boat that's nicer to look out from than to look upon [...]
    The outlook will be a bit different to the designer's suggestion. She will have no sidewalls at the foredeck which are restraining the view and will have a different paint scheme.

    Anyway, she is a roomy houseboat, so she will never achieve the most elegant lines of, say, a classic sailboat.

    A boat building friend of mine started his build in September in Saxony. He already drafted another look for his boat: https://www.boote-forum.de/showthrea...9&#post4378679
    Gruß, Günter

  12. #12
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    Default Re: Houseboat Katamaran ECO62

    If anyone is interested in more pictures, my build until now is partially documented (in German) in this thread:

    https://www.boote-forum.de/showthread.php?t=260166
    Gruß, Günter

  13. #13
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    Default Re: Houseboat Katamaran ECO62

    Quote Originally Posted by rudderless View Post
    Maybe you can omit some of the batteries if you add fittings for a backup yuloh oar:

    Thanks, it is interesting for sure. When I was 12 years old, I accidentally met an inland sailor and he teached me "wriggen", which means, to propell a boat with one oar at the stern. Like yuloh but using an odinary oar.
    Gruß, Günter

  14. #14
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    Mar 2015
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    Default Re: Houseboat Katamaran ECO62

    This year the bulding speed becomes very low. I built the second hull and had a lot of little things to do and to build.

    k021.jpgk022.jpgk001.jpgk002.jpg
    Gruß, Günter

  15. #15
    Join Date
    Oct 2005
    Location
    The Netherlands
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    557

    Default Re: Houseboat Katamaran ECO62

    Guenter, soon there is the Traditionele Schepenbeurs in Den Helder, also with the Abba, for amator builders. It is worth a visit and one can sleep in the big charter boats. I would like to meet other forumites from the neighbourhood. And good luck with your catamaran. Groet, Frank

  16. #16
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    Jun 2017
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    spicewood, texas, usa
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    Default Re: Houseboat Katamaran ECO62

    the hull looks nice. what other pics do you have? have you done anymore on the bridge deck/?

    jim

  17. #17
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    Default Re: Houseboat Katamaran ECO62

    The bridge deck is on the same condition as I left it at the end of the last year.
    Today I moved the second hull (90 kg) from workshop 1 via the garden to the workshop 2 (tent) alone. I used a garden hand cart and additionally "invented" a wheeled beam with support wheels.
    k005.jpgk008.jpgk019.jpgk022.jpgk032.jpg
    Gruß, Günter

  18. #18
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    Default Re: Houseboat Katamaran ECO62

    The hull has to be turned around (pivot at transom) to fit into the tent shop. I put the transom at a ring mount (between the wooden plates) lowered the support wheels and the wheels of the cart lost ground contact. Then it was easy to turn the hull around the pivot point and afterwards pushing it into the tent.

    k034.jpgk035.jpgk036.jpgk038.jpgk040.jpg
    Gruß, Günter

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