Calculate displacement/PPI from area?

Discussion in 'Boat Design' started by YotaTruck, Jul 29, 2014.

  1. YotaTruck
    Joined: Jun 2013
    Posts: 48
    Likes: 0, Points: 6, Legacy Rep: 10
    Location: NJ

    YotaTruck Junior Member

    Can someone calculate (or show me how to calculate) the displacement for a simple flat bottom plumb sided boat design for me? The area (according to Google Sketchup) is 81.2 SF. I'd like to know the PPI so that I can calculate the load capacity at various waterlines. If more information is needed, please let me know.
     
  2. Richard Woods
    Joined: Jun 2006
    Posts: 2,208
    Likes: 166, Points: 63, Legacy Rep: 1244
    Location: Back full time in the UK

    Richard Woods Woods Designs

    well obviously the deeper it is in the water the more displacement it has. So what draft is your boat

    Richard Woods
     
  3. YotaTruck
    Joined: Jun 2013
    Posts: 48
    Likes: 0, Points: 6, Legacy Rep: 10
    Location: NJ

    YotaTruck Junior Member

    It only exists on paper at the moment. I stretched the 18' Phil Bolger designed "Work Skiff" to 20' and am trying to determine what it will draft at various loads. Work Skiff drafts 3" at 1100lbs, so that would be about 366 PPI from what I gather since (I think) PPI should stay constant due to the plumb, rather than flared sides. Just trying to figure out how much adding 10 SF to the hull increases load carrying ability.
     

  4. gonzo
    Joined: Aug 2002
    Posts: 15,439
    Likes: 1,011, Points: 123, Legacy Rep: 2031
    Location: Milwaukee, WI

    gonzo Senior Member

    It will increase the load carrying capacity by 62.6 lbs in fresh water and 64 lbs in salt water per cubic feet of hull.
     
Loading...
Similar Threads
  1. thenavalarch
    Replies:
    0
    Views:
    751
  2. Randy brandon
    Replies:
    9
    Views:
    963
  3. NITHIN BABU
    Replies:
    0
    Views:
    1,485
  4. Peterfromholland
    Replies:
    6
    Views:
    2,952
  5. AdamOMahony
    Replies:
    75
    Views:
    6,154
  6. xichyu
    Replies:
    0
    Views:
    1,151
  7. craphy
    Replies:
    0
    Views:
    1,422
  8. floating
    Replies:
    1
    Views:
    1,550
  9. Steveso
    Replies:
    40
    Views:
    5,386
  10. Chris Pap
    Replies:
    53
    Views:
    5,891
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.