22m cruising cat design concept

Discussion in 'Multihulls' started by Becaris, Aug 3, 2008.

  1. Alik
    Joined: Jul 2003
    Posts: 2,802
    Likes: 185, Points: 73, Legacy Rep: 1306
    Location: Thailand

    Alik Senior Member

    For that, trolling mode at gearbox is available, or separate trolling outboard...
     
  2. brian eiland
    Joined: Jun 2002
    Posts: 4,882
    Likes: 168, Points: 73, Legacy Rep: 1903
    Location: St Augustine Fl, Thailand

    brian eiland Senior Member

    Diesel-Electric Propulsion

    Granted there has been a lot of 'overselling' of this relatively new subject in smaller yacht applications.

    But I for one do believe it is the future, particularly in auto applications. And as it is refined there, the trickle-down effect will arise, and boats will benefit as well. The torque characteristics of the electric motor just match needs of a vehicle propulsion device too well to be ignored...max torque at low speed acceleration, verses the exact opposite supply from an internal combustion engine.

    Now we just have to solve the energy storage equation in general, and the electrical energy storage in particular.
    http://www.boatdesign.net/forums/propulsion/new-propulsion-sytems-ships-9630-14.html#post89605
    http://www.boatdesign.net/forums/propulsion/new-propulsion-sytems-ships-9630-11.html#post85848
     
  3. brian eiland
    Joined: Jun 2002
    Posts: 4,882
    Likes: 168, Points: 73, Legacy Rep: 1903
    Location: St Augustine Fl, Thailand

    brian eiland Senior Member

    I've seen more than a few twin 1000-2000HP diesel sportfishers (that don't have 'outboards') idle those big engines for hours at a time :!: ...can't be good for those engines either.
    http://www.runningtideyachts.com/archives/needforspeed.html
     
  4. Alik
    Joined: Jul 2003
    Posts: 2,802
    Likes: 185, Points: 73, Legacy Rep: 1306
    Location: Thailand

    Alik Senior Member

    Trolling valve is the solution.
     
  5. apex1

    apex1 Guest

    But that is again wasting energy Alik. The solution would be...............nah I will not say it again.....;)
     
  6. Alik
    Joined: Jul 2003
    Posts: 2,802
    Likes: 185, Points: 73, Legacy Rep: 1306
    Location: Thailand

    Alik Senior Member

    True, that is why separate trolling motor is better. This solution with electrical or gasoline trolling outboard is used for decades already...
     
  7. Spiv
    Joined: Jun 2007
    Posts: 221
    Likes: 16, Points: 28, Legacy Rep: 207
    Location: The Big Wide Blue Brother

    Spiv Ancient Mariner

    Renewable Energy magazine

    This from the magazine:


    Colleague, To sign up for your own FREE digital copies of Renewable Energy Focus, simply go to: www.subscription.co.uk/cc/ref/2192 and complete the online registration form.



    There is always something interesting about solar and batteries in it.
     
    1 person likes this.
  8. Jameswright4
    Joined: Sep 2009
    Posts: 5
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: London UK

    Jameswright4 Junior Member

    Dreams to Reality

    Well shall we try and make this a reality ?

    I am the owner of the last Walker Wingsail built and in the nine years of ownership have rebuilt Larinka and can safely say the Wingsail works perfectly . The higher the winds speed the better she performs. Anything over 30 knots and we feather the wing and highest endurance was 65mph and she remained stable despite a massive sea.

    I now intend selling her and want to commission the building of a larger cat with all the trimmings but as importantly want a much faster boat and will use either two wings or two contoured foils.

    The mechanics and operation of fixed folis or wings is literally childs play and want to further demonstate on a larger boat how effective this form of sailing can be.

    To view my current yacht enter LARINKA into Google and up she comes or
    visit www.planesail.com

    I have business interests in the Philippines and India and know boatbuilders there who could build a craft for me. The main saving is the labour cost which here in the UK is circa 55% of the overall cost so makes it literally uneconomic to build here. Larinka was built in our naval dockyard in Plymouth and John Walker the designer went into Chapter 11 having spent £15m and only ever built four of these boats !!!

    I am going to Manila in three weeks so would love a design to show to the boatyard there who already produce multihulls.

    So I am game to get one costed up out there if you want to see something like this put into reality.? Kind regards James Wright
     
  9. Spiv
    Joined: Jun 2007
    Posts: 221
    Likes: 16, Points: 28, Legacy Rep: 207
    Location: The Big Wide Blue Brother

    Spiv Ancient Mariner

    Hi James,

    I am about to build a 17 x 8.3m composite cat.
    I had the hull designed by Richard Woods and I designed the superstructure and whisbine style CF mast with 3 furling sails.

    The hulls are very slender, but there is a lot of space above WL in the hulls.
    Dry boat weight should be 7.5 ton, cruising design displacement 13 ton.
    Bridgedeck clearance 1.1m.

    Please send me an email if you want to discuss more as I do not want to hijack this thread.
     

    Attached Files:


  10. brian eiland
    Joined: Jun 2002
    Posts: 4,882
    Likes: 168, Points: 73, Legacy Rep: 1903
    Location: St Augustine Fl, Thailand

    brian eiland Senior Member

    Interesting. I posted some of this WingSail info over on another forum as well:
    http://www.yachtforums.com/forums/general-sailing-discussion/12037-wingsail-video.html?posted=1#post84426



    Do you have any sketches (even rough ones) done up of what you have in mind? Difficult to even talk any figures without some basics.
    ...and what do you mean by two contoured foils?
     
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.