compact propulsion unit

Discussion in 'Propulsion' started by lausl, Mar 24, 2014.

  1. lausl
    Joined: Nov 2005
    Posts: 32
    Likes: 0, Points: 6, Legacy Rep: 10
    Location: Germany

    lausl carpe diem yacht design

    We are looking for a minimum height engine/drive for a fast power boat with moderate V. The cockpit layout shall be without stepos, the design very much like the lobster Picnic boats around 33'. I presume we need about 420 to 470 hp.
    I presume that a single engine with simple shaft yields the best results, but I might be wrong, there must be so many other, not off the shelf solutions to get the sole level down! Your suggestions are very much appreciated. We are located in Germany, so dealer/mechanics contacts are also welcome.
    Klaus
     
  2. nimblemotors
    Joined: Jun 2009
    Posts: 244
    Likes: 3, Points: 0, Legacy Rep: 4
    Location: Sacramento

    nimblemotors Senior Member

    A four-rotor wankle rotary, get out your wallet!
    [​IMG]
     
  3. lausl
    Joined: Nov 2005
    Posts: 32
    Likes: 0, Points: 6, Legacy Rep: 10
    Location: Germany

    lausl carpe diem yacht design

    Probably not from the discounters shelf this one, but is there a
    reliyable source with all the systems with it, exhaust, electronics, andhas it got
    emission certificates? We need those for the CE Certification.

    Klaus
     
  4. nimblemotors
    Joined: Jun 2009
    Posts: 244
    Likes: 3, Points: 0, Legacy Rep: 4
    Location: Sacramento

    nimblemotors Senior Member

    This is a custom built engine. If your wallet is big enough, I'm sure they can get any certification you want. Reliable? If it was a reliable source you'd know about it already.

    Check the unlimited hydroplane guys, they have those turbine jet engines from helicopters, pretty compact. Now you really need a big wallet.

    [​IMG]
     
  5. Westfield 11
    Joined: Apr 2008
    Posts: 215
    Likes: 8, Points: 0, Legacy Rep: 95
    Location: Los Angeles

    Westfield 11 Senior Member

    What was your reason for rejecting the Mercruiser line of engines? They would be the obvious starting place, were they too tall? If a sterndrive is not suitable, you can use a V-drive to keep the engine in the stern.
     
  6. daiquiri
    Joined: May 2004
    Posts: 5,372
    Likes: 239, Points: 73, Legacy Rep: 3380
    Location: Italy (Garda Lake) and Croatia (Istria)

    daiquiri Engineering and Design

    What is the available space for the engine?
     

  7. FAST FRED
    Joined: Oct 2002
    Posts: 4,519
    Likes: 109, Points: 63, Legacy Rep: 1009
    Location: Conn in summers , Ortona FL in winter , with big d

    FAST FRED Senior Member

    If the boat is to be marketed , using twin engines or a single with bow thruster and stern thruster so an unskilled operator can use a side stick to dock/manuver the boat will be required .
     
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