Welcome to the NavList Message Boards.

NavList:

A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    or...
       
    Reply
    Wind + current
    From: Doug Royer
    Date: 2003 Apr 17, 10:56 -0700

    Mr. Allen, just a few questions about your vessel if I might ask.
    1. Is it sail or power?
    2. What is the area of the vessel above the waterline?I don't mean measure
    the area but is it large enough to catch a lot of wind?
    3. What is the area of the vessel under the waterline?Do you have a large
    keel area,what is the draft of the vessel and what is the shape of the
    vessel under the waterline?
    4. Does the vessel have a single screw or double screw?
    For what it's worth, in my experience (large vessels), to a certain point
    and perameters the area of a vessel exposed to water borne forces is greater
    than the area exposed to air borne forces.The vessels speed through the
    water and it's aspect to the wind and current is also a factor.Take this
    simplified example: a vessel fully laden with a deep draft moving moving
    slowly through the water even with a large sail area is much more effected
    by the forces of the water than the wind.That same vessel unladen in the
    same conditions is then more influenced by the wind because of
    weight,inertia and a greater sail area exposed etc.
    Mr. Kenchington's post on this matter,in my opinion,has merit.It's a good
    way of looking at the problem.
    I would be interested in finding out how your boat is powered and configured
    for manouvering.
    
    
    

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

    Name:
    (please, no nicknames or handles)
    Email:
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.
    Email:

    Email Settings

    Posting Code:

    Custom Index

    Subject:
    Author:
    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site