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Re: [PSUBS-MAILIST] Need a Tail?

In fact the tail is more specifically for more controlled pitch, the tail itself is to reduce rolling. Such things as: Me, turbulence, sharks, rocks, captain nemo, the bottom, turning corners, giant squids, waves and more turbulence. 
EM.


DJACKSON99@aol.com wrote:


Hi
So it's to prevent it from rolling, right. But what's going to cause it to roll? --Doug J In a message dated 3/19/2004 2:54:05 PM Central Standard Time, emuller@naic.edu writes: 

    Hi Doug.
    The reason for the tail is to provide a useful torque for pitching.
    The V shape is to maximise rolling stability while reducing the
    resistance to pitch.
    The more torque, the more powerful the pitch and the less energy
    necessary.
    This is all hand-wavey stuff of course.
    EM.


    DJACKSON99@aol.com wrote:
> > Regarding Erik's 
    > design http://www.prismnet.com/~moki/20040303.075202/sub1.jpeg
    > <http://www.prismnet.com/%7Emoki/20040303.075202/sub1.jpeg>  Would
    > this really need a tail?  Considering that this one does not:
    > http://www.odyssea-sub.com/   What is the criteria for deciding
    if you
    > need a tail?  :)
> > > Regards, 
    > Doug J