42ft RIB Hull

Discussion in 'Boat Design' started by Fanni, Oct 5, 2015.

  1. Fanni
    Joined: Sep 2015
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    Fanni New Member

    Thinking of a possibility of designing a 42ft Rigid Inflatable Boat that will combine a wide slower, touristy hull with that of a fast narrower more offshore faster orientated.

    How would steps work on a wide deep V hull given required performance as follows:

    - Low planning speed (ideally around 10-12 knots)
    - No stuffing
    - Speeds around 55knots with tween 350hp
    - Very good sea keeping in high, choppy seas

    You think it is possible to "marry" these deferent schools of hull design while keeping a robust product?

    Thanks in advance for your ideas!
     
  2. Rurudyne
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    Rurudyne Senior Member

    If your target customer base includes many of my fellow Americans you may have to install fewer passenger seats to keep loading down. :p

    (Sorry, I just couldn't resist ... myself, I've wondered about a RIB to satisfy the job for which Bolger's Wyoming was designed for.)
     
  3. Fanni
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    Fanni New Member

    No one with experience in stepped hulls?
     
  4. DCockey
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    DCockey Senior Member

    Transverse steps or longitudinal steps?
     
  5. Fanni
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    Fanni New Member

    I mean how Transverse Steps could work on a wider hull with the target of reducing drag and thus increasing speed.

    Another question is whether fitting steps will increase the planning speed.

    Thanks in advance!
     
  6. Tad
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    Tad Boat Designer

    If you look at Mike Peters article in Professional Boatbuilder #127 (Oct/Nov 2010), "Peters On Powerboats, Part 2" he explains why his office fits a single step to wider hulls and two steps in narrower hulls.
     
  7. Fanni
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    Fanni New Member

    thanks! interesting article indeed!
     
  8. Rurudyne
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    Rurudyne Senior Member

    Can you give a link?

    I looked at his website but that article wasn't among his writings that he'd presented there.

    Unless, of course, "Mike Peters" isn't Michael Peters who writes Sightlines (some of the writings on that web page) ... which I have to admit is a possibility. Or that he just didn't include everything he's written.
     
  9. Tad
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    Tad Boat Designer


  10. jimburden
    Joined: Oct 2015
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    jimburden Junior Member

    Giant rubber boat making.

    Look into using lay flat 16 inch hose in the heavier 250 PSI versions. This is very tough wall hose in any length used for industrial discharge hose. You can clamp the ends shut with heavy galvanized bar stock and grade eight bolts and nuts with cement inside the joint. Try clamping at an angle to make tapered entries and exits for the bow and stern. Jim Burden, Lincoln Nebraska
     
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