Weirdest propulsion system

Discussion in 'Propulsion' started by gonzo, Jan 12, 2010.

  1. SamSam
    Joined: Feb 2005
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    SamSam Senior Member

    This is weird...

    [​IMG]

    http://images.google.com/imgres?img...el=s&rls=org.mozilla:en-US:official&sa=G&um=1
     
  2. kistinie
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    kistinie Hybrid corsair

    No, Nothing ;-)

    Rotor boats are not as crazy as it may sound.


    The first boat equipped like this in 1926 crossed Atlantic via south America.
    Reported speed was 4 to 9 Knts

    One of the last try was in 2008 on a 130 meters cargo built by Lindenau-Werft shipyard in Kiel.
    Any news of this boat?

    In 2009 the Finland-based maritime engineering company Wärtsilä unveiled a concept for a cruiseferry that would utilise flettner rotors as means of reducing fuel consumption.
    http://en.wikipedia.org/wiki/Rotor_Ship

    More on Magnus effect (also used in Boomerangs and golf balls)
    http://en.wikipedia.org/wiki/Magnus_effect
     

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  3. powerabout
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    powerabout Senior Member

    also used on stabilisers on high speed craft ( like 20+knots) but in the water

    Just for interst sake,,how about a 80m vessel that uses Voith Schnider thrusters as main propulsion????
    ALL electric too....

    I hope to have a job on that soon
     
  4. jehardiman
    Joined: Aug 2004
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    jehardiman Senior Member

    You know, depending on how it was set up, it may work....not very efficient, but you can make inertial proplusion systems.

    http://books.google.com/books?id=B-MDAAAAMBAJ&pg=PA167&lpg=PA167&dq=popular+mechanics+black+box+moves&source=bl&ots=Zu571M81Vp&sig=jQ6JHusxPhDxC9onEH9kwaEJ6Gs&hl=en&ei=o2RsS6LBDJOmsgObmd2yDQ&sa=X&oi=book_result&ct=result&resnum=6&ved=0CBwQ6AEwBQ#
     
  5. CDK
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    CDK retired engineer

    Yes, you can move a small boat by shifting your body weight or running back and forth, fast in one direction, slow in the other. The math is complicated, keywords are mass, delta V and friction.

    There are machines to compress and polish a fresh concrete floor in factory buildings so it needs not be painted, yet absorbs no oil or water. Some sort of wide cast iron sledge with a counterweight, engine and cabin spring mounted on top of it. No drive train, no wheels, just a hydraulic system to change the angle between sledge and counterweight. The driver has a control stick and a throttle pedal and can move the vibrating heavy machine in any direction.

    By converting part of the energy in one direction only from kinetic to thermal by applying local friction, the resultant vector in the other direction is larger and can propel a vehicle.
     
  6. Boston

    Boston Previous Member

    obviously you guys have not had the always exhilarating experience of operating a large rotary floor sander with say a 40 grit paper on it
    you control the direction by adjusting the angle of attack
    assuming you dont dig a hole in the floor first that is

    sane basic idea as above I just never knew what it was called
     
  7. CDK
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    Location: Adriatic sea

    CDK retired engineer

    Yes Boston, the same principle.
    You could even move your boat with it as long as there is any floor left.
     
  8. peter radclyffe
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    peter radclyffe Senior Member

    Master Whisk, Variable Speed, Whisks Up To 5 Gallon, Beats Up To 50 Eggs
    Dynamic International - Model 048-FT97
    SKU: FT97
    Shipping Weight: 10.00lbs.
     
  9. SamSam
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    SamSam Senior Member

    How about a lifesize putt putt boat? Maybe a full size one powered by baking soda?

    [​IMG]
    [​IMG]
     
  10. baboonslayer
    Joined: May 2010
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    baboonslayer Junior Member

    I have a weird one that I just thought of. Might not work, don't really care anyway. This idea for an almost perpetual motion motor popped into my head...

    it is pretty simple. The same pole magnets repel, creating a force offset of the crankshaft, creating rotational energy.

    another weird one to try is to put a rudder on a small boat, preferably a wide bladed one, and attach to the stern etc., then try moving the tiller handle back and forth so the rudder flaps like a fish's tail. The boat should move forward. (this might actually work :D).
     
  11. hoytedow
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    hoytedow Carbon Based Life Form

  12. troy2000
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    troy2000 Senior Member

    Ever heard of sculling?:p

    I've moved small boats short distances by working the rudder the way you describe. But it won't get you very far very fast, for the amount of work put into it.
     
  13. SamSam
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    SamSam Senior Member

    I believe you've just invented sculling and the electric motor. I too believe they might work. ;)
     

  14. dieseldude
    Joined: Jul 2010
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    dieseldude Junior Member

    weird engine

    Weirdest engine I ever worked on was a Deltic in the old "Nasty" type patrol boats.:rolleyes:
     
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