Volume - how do you dupliate with 2 different shapes?

Discussion in 'Surfboards and Surfboard Design' started by sisurfdogg, Sep 16, 2015.

  1. Sep 16, 2015 #1
    sisurfdogg

    sisurfdogg Well-Known Member

    5,399
    Jun 17, 2013
    I want to make or buy a new board, and I like the volume of a rocket pig fish I made. I want a shorter board with less rocker but keep volume the same, roughly, for ease of paddling and speed in small to medium surf. Also a quad future set up.

    1. How do I approximate the volume of the old board? Do I put 10 gal. water in bathtub, mark water level on side of tub, add board, submerge board (how with out adding your hands to equation), draw another line. Take out board, add measured amounts of water to get to higher line = volume?

    2. Is there an easier way based on dims?

    3. If I made the board, how do I calculate volume without soaking the foam in a bathtub?

    Thanks in advance for your advice.
     
    Last edited: Sep 16, 2015
    sisurfdogg, Sep 16, 2015
    sisurfdogg, Sep 16, 2015
  3. Sep 16, 2015 #2
    Zeroevol

    Zeroevol Well-Known Member

    7,419
    Jun 22, 2009
    Sis, you have a bath tub that big to fit a surfboard?
     
    Zeroevol, Sep 16, 2015
    Zeroevol, Sep 16, 2015

  5. Sep 16, 2015 #3
    sisurfdogg

    sisurfdogg Well-Known Member

    5,399
    Jun 17, 2013
    I dunno yet. I was waiting for my wife to leave the house to see.
     
    sisurfdogg, Sep 16, 2015
    sisurfdogg, Sep 16, 2015
  6. Sep 16, 2015 #4
    Zeroevol

    Zeroevol Well-Known Member

    7,419
    Jun 22, 2009
    Ha ha ha ha
     
    Zeroevol, Sep 16, 2015
    Zeroevol, Sep 16, 2015
  7. Sep 16, 2015 #5
    Barry Cuda

    Barry Cuda Guest

    Did you flunk geometry.
    Use the formula for volume!!!
    F(ucking flunkies.....
     
    Barry Cuda, Sep 16, 2015
    Barry Cuda, Sep 16, 2015
  8. Sep 16, 2015 #6
    live4truth

    live4truth Well-Known Member

    866
    Feb 9, 2007
    Barry is kinda on the right track...nt., below...

     
    live4truth, Sep 16, 2015
    live4truth, Sep 16, 2015
  9. Sep 16, 2015 #7
    oipaul

    oipaul Well-Known Member

    671
    May 23, 2006
    This only works if you shout "eureka" after you do it...
     
    oipaul, Sep 16, 2015
    oipaul, Sep 16, 2015
  10. Sep 16, 2015 #8
    LBCrew

    LBCrew Well-Known Member

    6,024
    Aug 12, 2009
    Take some detailed measurements of your current board, measuring width and thickness every 4 inches. Take a piece of solder and bend it around the rail and make measurements of that every four inches as well.

    Download Aku Shaper, and essentially re-create the board in CAD. Aku will calculate the volume for you. Send the file to Greenlight and have them CNC your blank. You can then rub out the grooves left by the machine and call yourself a "shaper."
     
    LBCrew, Sep 16, 2015
    LBCrew, Sep 16, 2015
  11. Sep 17, 2015 #9
    sisurfdogg

    sisurfdogg Well-Known Member

    5,399
    Jun 17, 2013

    Thanks!
     
    sisurfdogg, Sep 17, 2015
    sisurfdogg, Sep 17, 2015
  12. Sep 17, 2015 #10
    sisurfdogg

    sisurfdogg Well-Known Member

    5,399
    Jun 17, 2013
    Two boards with the same length, width, and thickness in the middle will still have different volume due to difference in rails, bottom contours, and domed v. not domed deck, and other subtle feature you are obviously clueless about. Still surfing on a stone tablet?
     
    sisurfdogg, Sep 17, 2015
    sisurfdogg, Sep 17, 2015
  13. Sep 17, 2015 #11
    Valhallalla

    Valhallalla Well-Known Member

    2,066
    Jan 24, 2013
    This is the last post in the Swaylocks threade linked to by live4truth:

    Seems like a pretty simple and accurate methodde to find the volume of your existing wave surf riding bored. Won't work so well for your unglassed shape though.
     
    Valhallalla, Sep 17, 2015
    Valhallalla, Sep 17, 2015
  14. Sep 17, 2015 #12
    The Incorrigible Steel Burrito VII

    The Incorrigible Steel Burrito VII Well-Known Member

    1,216
    Oct 19, 2014
    I like going to the Channel Islands board builder feature and playing with the dims. It's fun. I actually had a board shaped off te dims I created based on the ci boardbuilder and sure enough not enough volume.
     
    The Incorrigible Steel Burrito VII, Sep 17, 2015
    The Incorrigible Steel Burrito VII, Sep 17, 2015
  15. Sep 17, 2015 #13
    sisurfdogg

    sisurfdogg Well-Known Member

    5,399
    Jun 17, 2013
    Someone should be drawn and quartered.
     
    sisurfdogg, Sep 17, 2015
    sisurfdogg, Sep 17, 2015