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Falling Cat - Rotation with zero net angular momentum
eyytee
3,429 views
See: http://en.wikipedia.org/wiki/Falling_cat_problem
This explains how cats turn around while having zero net angular momentum during a fall.
Cat falling seen from a goo...
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SUPER BALL RETURN FROM TUNNEL
eyytee
112 views
A super ball is thrown into a square tunnel. After bouncing around the tunnel axis it returns back to exit at the same side it entered
The simple 2D case is shown here:
ht...
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DYNAMIC SOARING EXPLAINED
eyytee
3,456 views
See: http://en.wikipedia.org/wiki/Dynamic_soaring
Real world example: http://www.youtube.com/watch?v=wY41yVq88mc
More info:
http://aeroexperiments.org/dynamicsoaring.shtm...
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Directly Down & Up Wind Faster than the Wind
eyytee
10,352 views
http://en.wikipedia.org/wiki/Sailing_faster_than_the_wind#Sailing_dead_downwind_faster_than_the_wind
This animation shows how windpowered rotor vechicles can go directly d...
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DOWNWIND VMG GRATER THAN WINDSPEED (STREAM LINE)
eyytee
1,169 views
This animation shows how sail vehicles are able to outrun the wind, that pushes them (achieve a downwind velocity-made-good greater than true wind speed). The column indica...
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UPWIND vs. DOWNWIND FASTER THAN WIND
eyytee
2,484 views
This animation shows how wind powered vehicles can go "directly upwind" or "directly downwind faster than the wind" using the same mechanical principle of leverage. The onl...
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DDWFTTW : TACKING PROPELLER BLADE (WEDGE)
eyytee
3,727 views
This animation shows how a wind powered vehicle can outrun the wind, while going directly downwind. The vehicle uses a propeller, connected to the wheels. This enforces a c...
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DOWNWIND VMG GRATER THAN WINDSPEED (WEDGE)
eyytee
1,985 views
This animation shows how sail vehicles are able to outrun the wind, that pushes them (achieve a downwind velocity-made-good greater than true wind speed). As an analogy a w...
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DDWFTTW ANALOGY #1
eyytee
1,487 views
A mechanical analogy for DDWFTTW (Directly Downwind Faster Then The Wind), in terms of a simple stick-lever mechanism.
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DDWFTTW ANALOGY #2
eyytee
1,449 views
A simple mechanical analogy for DDWFTTW (Directly Downwind Faster Then The Wind). The red line indicates the simple stick-lever mechanism.
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