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    Prop walk
    From: Stan K
    Date: 2003 Apr 24, 21:36 EDT

    Is it true that an inboard, with its propshaft angling downward, tends to
    prop walk more than an I/O or outboard, whose propshaft is perpendicular to
    the direction of travel (whether forward or reverse).  If so, then, for an
    inboard, doesn't a prop blade near the top have more of an angle in the water
    with respect to the direction of travel (horizontal) than does a blade at the
    bottom?  That is, a blade at the bottom tends to slice through the water,
    while a blade at the top tends to push against the water.  In other words,
    the symmetry is lost with respect to the direction of travel, and a blade at
    the top would have more of a sideways effect than one at the bottom, causing
    prop walk.
    
    This is just my intuition, based on a piece of information that I am not
    certain is true.
    
    Stan
    
    P.S.  I wrote this before I finished reading all the explanations provided by
    other list members.  It seems to be in line with Walter Guinon's and Herbert
    Prinz's explanations, and one of Trevor Kenchington's.
    
    
    

       
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