Tandem multihull

Discussion in 'Multihulls' started by warren mosler, May 7, 2011.

  1. warren mosler
    Joined: Apr 2008
    Posts: 12
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: St. Croix

    warren mosler Junior Member

    I just took a ride in the latest from
    St. Croix. It's nothing more than two dingy's,
    rigidly connected by an old Hobie mast,
    38ft loa, with an 8hp outboard.
    We went outside the reef into some 2-4 ft seas at about 5-7 kts.

    The ride quality was phenomenal.
    Pitch motions were both subdued and non boat like
    in a good way. It was a dramatically reduced and far
    different pitch than in a 'normal' 38 ft hull of any design.

    Into head seas the forward dingy kept it's nose up, even when coming down the backside of a wave, and didn't 'flip up' going into a wave. The trailing dingy stayed relatively level and moved mainly vertically with very different accelerations than experienced in other boats. more like a long wheelbase bicycle going over an undulating sandy surface.

    Roll was subdued vs what it would be
    like in either dingy alone as well.

    Anyone ever seen or tried something like this?
    Am I missing something?

    Yes, it's going to be relatively inefficient, but with today's light weight
    structures it's seem efficient enough to be worth the vastly superior ride quality?

    And it won't have much load carrying capacity for its loa, but again for passengers it doesn't have to carry all that much load?

    I'm wondering how it would scale to, say, two 35' hulls maybe 50 ft apart?

    And when diminishing returns set in from the improvement due to the
    'wheelbase' effect?
     

    Attached Files:

  2. Doug Lord
    Joined: May 2009
    Posts: 16,653
    Likes: 322, Points: 93, Legacy Rep: 1362
    Location: Cocoa, Florida

    Doug Lord Flight Ready

    Very interesting and very wierd-thanks for showing us! Worth some thought-I think.
     
  3. warren mosler
    Joined: Apr 2008
    Posts: 12
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: St. Croix

    warren mosler Junior Member

    Tandem Ferry Concept

    While likely to not be all that fast/efficient, the attached Tandem Ferry concept should have a far superior stability, sea worthiness, and a very user friendly ride?
     

    Attached Files:

    Last edited: May 17, 2011
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.