Best rough water hull you know.

Discussion in 'Powerboats' started by xarax, Aug 5, 2006.

  1. KCook
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    KCook Senior Member

  2. Pericles
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    Pericles Senior Member

    Thanks KCook,

    A very interesting series of posts there.

    Pericles
     
  3. MrHysucat
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    MrHysucat Hysucat Evangelist

    In practice the Hysucat seems to skip over the swells if you maintain sufficient forward momentum.

    You just have to love those "wave orbital velocity fields". :D

    Yikes this is a bit old .... might get accused of raising the dead and get burned as a witch. :eek:
     
  4. Easy Rider
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    Easy Rider Senior Member

    Here's a boat I designed in the 70s that may be of interest. It's ultra light displacement. 28 X 9'2". Plywood. 55 hp OB. 12 to 14 knots.

    The hen scratch showing lines is a bit different than the boat that got built. I survived in 2 story size waves w some breaking seas.
     

    Attached Files:

    Last edited: Apr 20, 2012
  5. J Feenstra
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    J Feenstra Junior Member

    why not extend the bottom hull so your stem angle has like an 80 degree angle with the waterline. You can still deflect the spray rail in the configuration you made, but the longer hull might make for an even smoother ride.

    Good idea?
     
  6. Easy Rider
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    Easy Rider Senior Member

    J Feenstra,
    The boat was originally designed with a steeper stem but I thought the weak link was the low volume in the bow so in order to find out if that was going to be a problem I extended the bow during construction thinking if I did'nt have a problem w the extended bow I did'nt have a problem. Turned out to be a non-issue.
    In quartering following seas the forward end of the boat lacked stability but the stability of the stern kept things in control.
    The boat did not perform well w much weight aboard. It was and really needed to be light.
    It's shape permitted it to be very light and also strong. In strong head winds and seas it had a tendency to become airborne and 50 knot head wind was very dangerous. It wanted to go over backwards.

    Easy Rider
     
  7. J Feenstra
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    J Feenstra Junior Member

    So, in your opinion fast hull form with an steeper stem will increase the head sea performance, but will mess up the quarter sea performance. Do you have any indication how mucht this will be?

    I am designing a planing hul form with a fairy large payload capacity, so going airborne won’t be an issue.
     
  8. daiquiri
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    daiquiri Engineering and Design

  9. J Feenstra
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    J Feenstra Junior Member

  10. Lee01
    Joined: May 2012
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    Lee01 Junior Member

    Last edited: May 16, 2012

  11. MrHysucat
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    Location: Cape L' Agulhas/South Africa

    MrHysucat Hysucat Evangelist

    Looks pretty neat. Thanks for the video Lee01 ..... and welcome to the Forum.:D
     
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