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
    Name or NavList Code:
    Email:
       
    Reply
    Re: Prop-walk.
    From: Jared Sherman
    Date: 2003 Apr 22, 22:20 -0400

    Peter-
     
    
     Not right at all. Cavitation is, specifically, that phenomena where water 
    literally BOILS in the relative low pressure zone at the trailing edge of the 
    screw. Since the water pressure is lower closer to the surface, it is easier 
    for air to boil out in the water closer to the surface.
    
     Take a big enough prop, put enough horsepower behind it, and the right shape 
    to the edge. and you can make it cavitate at any depth. Reduce the 
    horsepower, reduce the prop speed, and you reduce the pressure differential 
    and the boiling stops.
    
     Another one explained in the engineering texts.
    
    
    

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Get a NavList ID Code

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

    A NavList ID Code guarantees your identity in NavList posts and allows faster posting of messages.

    Retrieve a NavList ID Code

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

    Email Settings

    NavList ID 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