Stepped hull and surface drive?

Discussion in 'Hydrodynamics and Aerodynamics' started by Salvatore84, May 13, 2012.

  1. Salvatore84
    Joined: Mar 2009
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    Location: Italy

    Salvatore84 Junior Member

    Hi to everyone!

    does someone knows somethin' about the layout surface drive+stepped hull?
     
  2. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    Boats, to operate properly, have to be designed as a complete system. To start with, there are surface propellers, which can be attached to several drive systems. This include straight shafts, outboards, I/Os, etc. Stepped hulls vary enormously. They go from the large step like a Thornycraft to multiple little steps that have become fashionable lately.
     
  3. mydauphin
    Joined: Apr 2007
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    Location: Florida

    mydauphin Senior Member

    If you have to ask then you need an engineer to work with you. Mine you with either one of these it is a little trial and error, lots of engineering to get these working optimally. With both of these on a boat you need a supercomputer and several engineers. Good luck, try a company like Skater race boats.
     
  4. Fastboats
    Joined: Jan 2005
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    Location: Arizona

    Fastboats New Member

    try aeromarine research.
     
  5. tunnels

    tunnels Previous Member

    Getting of the surface !

    Steps are a gray area !! its been done a million times !! everyone seems to have they own ideas and theories !! and they all work to varying degrees , i do not know of any hard and fast rules to say if you do this this and this that will be what you will get !!! if there is a magic formular for steps and stepping in differant directions someone somewhere is sitting on it and not sharing !!. .
    At the end of the day it all comes to getting air under the boat so it has minimal wetted area !! As far as i am concerned Tunnel boats do just that !! They fly !!! :D
     
  6. m3mm0s rib
    Joined: Aug 2011
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    Location: GREECE

    m3mm0s rib Senior Member

    Here's a way
     

    Attached Files:

  7. tunnels

    tunnels Previous Member

    Thats one hell of a internal framing system !! must have taken some time to plan out and make !!:D
     
  8. mydauphin
    Joined: Apr 2007
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    Location: Florida

    mydauphin Senior Member

    Looks like it is designed to ram other boats...
     
  9. tunnels

    tunnels Previous Member

    Just one thing i hope someone has taken into consideration ! being a boat with a tube rouns the outside they twist and want to flex so hope they bond it together with that in mind !!! Always going places flat out and through any kind of seas and masses amounts of horse power strapped on the back !!:D
     
  10. m3mm0s rib
    Joined: Aug 2011
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    Location: GREECE

    m3mm0s rib Senior Member

    So just when the speed of approaching the 70 node risked cut the boat in two
     

  11. Kestrel
    Joined: Nov 2010
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    Location: Milan Italy

    Kestrel Junior Member

    No fantasy nor magicians are needed, it's just a matter of physics. Like all physics phenomenons, it must be faced rationally and deeply. Many threads in the forum could be a start point, try this, for example:http://www.boatdesign.net/forums/boat-design/stepped-hull-resistance-35492.html then, surfing in the web, something can be found, but you'll have to put together a lot of litterature. Up to today, I don't know nothing like a specific compendium on the matter.
    K.
     
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