Looking for some tips for a glass bottom boat design

Discussion in 'Boat Design' started by Satrio12, Dec 19, 2024.

  1. TANSL
    Joined: Sep 2011
    Posts: 7,699
    Likes: 823, Points: 123, Legacy Rep: 300
    Location: Spain

    TANSL Senior Member

    The "bottom" of a boat extends from the horizontal keel to the waterline. There may therefore be a vertical or nearly vertical "window" in the "bottom" of a boat.
     
  2. gonzo
    Joined: Aug 2002
    Posts: 17,442
    Likes: 2,012, Points: 123, Legacy Rep: 2031
    Location: Milwaukee, WI

    gonzo Senior Member

    Not on a flat bottom boat though.
     
  3. TANSL
    Joined: Sep 2011
    Posts: 7,699
    Likes: 823, Points: 123, Legacy Rep: 300
    Location: Spain

    TANSL Senior Member

    Exactly the same applies for a flat bottom boat, of course. Why not?, explain me a reason.
    The flat bottom boat can also have a vertical or almost vertical "bottom".
     
  4. gonzo
    Joined: Aug 2002
    Posts: 17,442
    Likes: 2,012, Points: 123, Legacy Rep: 2031
    Location: Milwaukee, WI

    gonzo Senior Member

    On a flat bottom boat the bottom is horizontal. The only condition when the bottom is vertical, is when the boat capsized.
     
  5. TANSL
    Joined: Sep 2011
    Posts: 7,699
    Likes: 823, Points: 123, Legacy Rep: 300
    Location: Spain

    TANSL Senior Member

    OK.
    @gonzo, google "flat bottom boat" and you'll see that you're wrong.
    I don't know what else I could explain to you, I give up.
     
  6. comfisherman
    Joined: Apr 2009
    Posts: 818
    Likes: 415, Points: 63, Legacy Rep: 10
    Location: Alaska

    comfisherman Senior Member

    On the shallow flat bottom boats we saw in Florida, draft being that shallow and form of vertical windows would be to short for humans to utilize them. Could have flat bottom with significantly more draft and have glass below the waterline line but it would negate the shallow draft aspect...
     
    BlueBell likes this.
  7. TANSL
    Joined: Sep 2011
    Posts: 7,699
    Likes: 823, Points: 123, Legacy Rep: 300
    Location: Spain

    TANSL Senior Member

    Flat bottom hull, as long as I know, doesn't mean horizontal bottom. But, of course, a low shallow boat cannot have vertical windows below waterline. I think we both are talking about same thing.
     
    BlueBell likes this.
  8. Ad Hoc
    Joined: Oct 2008
    Posts: 7,949
    Likes: 1,818, Points: 113, Legacy Rep: 2488
    Location: Japan

    Ad Hoc Naval Architect

    Then your definition of hull "bottom" is very different from any Classification or regulatory body that defines bottom and side, as different:

    Your preferred prescriptive set of rules of chose, ISO:
    upload_2025-1-10_9-57-21.png

    Or Say Class:
    upload_2025-1-10_9-59-57.png

    It is self evident what/where the bottom and side of a hull is...one does not need any rules for this definition.
    But presented to you, for your edification.
     
    BlueBell likes this.
  9. BlueBell
    Joined: May 2017
    Posts: 2,946
    Likes: 1,094, Points: 113
    Location: Victoria BC Canada

    BlueBell . . . _ _ _ . . . _ _ _

    So, if a flat bottom boat has rocker is it no longer a flat bottom boat?
    Terminology perhaps, confusing for sure.
     
  10. Ad Hoc
    Joined: Oct 2008
    Posts: 7,949
    Likes: 1,818, Points: 113, Legacy Rep: 2488
    Location: Japan

    Ad Hoc Naval Architect

    Rocker is a longitudinal geometry direction definition.
    Bottom and side is a transverse geometry definition.

    Literally two different planes.
     
  11. BlueBell
    Joined: May 2017
    Posts: 2,946
    Likes: 1,094, Points: 113
    Location: Victoria BC Canada

    BlueBell . . . _ _ _ . . . _ _ _

    Yes, I realize that but it doesn't answer my question.
    And, perhaps, that is where the confusion exists.
     
  12. Ad Hoc
    Joined: Oct 2008
    Posts: 7,949
    Likes: 1,818, Points: 113, Legacy Rep: 2488
    Location: Japan

    Ad Hoc Naval Architect

    Well, it does, unless you're unaware that they are different geometric part definitions of a vessel's hull.
     
  13. BlueBell
    Joined: May 2017
    Posts: 2,946
    Likes: 1,094, Points: 113
    Location: Victoria BC Canada

    BlueBell . . . _ _ _ . . . _ _ _

    Not helpful in regards to this thread.
    Disregard my last.
     
  14. TANSL
    Joined: Sep 2011
    Posts: 7,699
    Likes: 823, Points: 123, Legacy Rep: 300
    Location: Spain

    TANSL Senior Member

    Thanks Ad Hoc, your comments are always clarifying.
    By the way, I found, in another of my favourite CS, the following definition of bottom shell.
    Extent of bottom shell.png
    Regardless of what each regulatory body considers as bottom or side, there are several ideas that some commentators in this thread are not very clear about:
    - plexiglass cannot be used
    - passengers cannot step on the windows and solutions must be established so that this does not happen.
    - the windows must be located in a perfectly flat area of the hull.
    - the windows can be horizontal or inclined, there are no restrictions on this.
    - the structure of the hull must be re-studied to properly accommodate these windows.
    - some regulations limit the maximum dimensions of these openings in the hull.
    - the stability after a damage in the window compartments must be studied.
    Any other clarification from you will be, as always, very enlightening.
    This is not a simple construction and irresponsible ideas or comments should not be launched into it, as they can be very dangerous.
     

  15. gonzo
    Joined: Aug 2002
    Posts: 17,442
    Likes: 2,012, Points: 123, Legacy Rep: 2031
    Location: Milwaukee, WI

    gonzo Senior Member

    If the bottom is a straight horizontal line on the sections view, it is a flat bottom. Another way to look at it is that the bottom has a continuous frame that is straight.
     
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.