FREE!ship Plus resistance calculation question

Discussion in 'Software' started by lumberjack_jeff, Oct 5, 2011.

  1. lumberjack_jeff
    Joined: Oct 2010
    Posts: 101
    Likes: 12, Points: 0, Legacy Rep: 99
    Location: Washington State

    lumberjack_jeff Sawdust sweeper

    calculations -> resistance -> calculation for re-planing and planing ships.

    after extracting data from current hull, the user is prompted for which formula to use. Select "D. Savitsky".

    For an outboard powered skiff, the input field for "distance between thrust line and CoG" means the distance between a horizontal line at the center of the prop and the neutral axis if the boat were attached to a rotisserie, right?

    That measurement is important to predict porpoising, but the field won't accept input. It defaults to 10. Any value you input is replaced by a number 3.28* larger.
     
  2. daiquiri
    Joined: May 2004
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    Location: Italy (Garda Lake) and Croatia (Istria)

    daiquiri Engineering and Design

    It works fine here on my PC, but the input value has to be bigger than 0.05 meters. The default value on my Freeship+ is 0.15 m.
     
  3. lumberjack_jeff
    Joined: Oct 2010
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    Location: Washington State

    lumberjack_jeff Sawdust sweeper

    maybe it's not liking my imperial units.
     
  4. daiquiri
    Joined: May 2004
    Posts: 5,372
    Likes: 239, Points: 73, Legacy Rep: 3380
    Location: Italy (Garda Lake) and Croatia (Istria)

    daiquiri Engineering and Design

    Oh yes, the international settings for numerical values on a PC quite often creates problems with software.
     
  5. lumberjack_jeff
    Joined: Oct 2010
    Posts: 101
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    Location: Washington State

    lumberjack_jeff Sawdust sweeper

    I switched to metric, it works fine.

    (but now my power figures are in Kw :-\ )
     

  6. daiquiri
    Joined: May 2004
    Posts: 5,372
    Likes: 239, Points: 73, Legacy Rep: 3380
    Location: Italy (Garda Lake) and Croatia (Istria)

    daiquiri Engineering and Design

    Now you know how I feel when I see thermal power expressed in Btu and fiberglass cloth weight in oz. :p
     
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