Hydro Gravity Roller

[vineet_kiran]

Hi veneeth,

This also not possible becasue the centre of gravity of the two weights up and down will be allways inside the cylinder.  With the weight of water the centre of gravity of the system will be allways inside the cylinder not above the cylinder. So the cylinder will not roll becasue of the centre of gravity is inside the cylinder.

Nixon

@Nixon,



You are right.   When I initially conducted the experiment  I think the track had a slight slope hence the cylinder was rolling.    When I made the track  perfectly horizontal  by using a spirit level,   the cylinder  is not rolling.  It is coming to equilibrium at some  point.
Thanks for  showing the fault and SORRY FOR  CRANKY  EXPERIMENT.

Regards,
Vineet.K.
 

[vineet_kiran]

 
Nice simulation!  (Useless machine)
http://www.youtube.com/watch?v=0ldaWsOWtc8&list=SPIJe1tLxlr82SvN8OOeEXcxpxPuh11dLn&index=1

[Airstriker]

How about the idea to use gas instead of liquid ? I mean:
1) Container filled with air at atmoshperic preasure
2) smaller container (made of some light material) put inside bigger container 1). This smaller container filled with some much lighter gas (helium or hydrogen advisable).
3) Displacement mass attached to the smaller container, just as in the simulation you attached vineet.


This way we wouldn't deal with the critical seal issue causing much friction and making the concept difficult to build. The air will be both in bigger container and outside the container so we don't have to deal with any leakages.
What do you think ?

[vineet_kiran]

 
@Airstriker,
I had thought of that.    I have posted  that drawing vide attachment above reply#16.   (Roller using hydrogen balloon).   This arrangement gains potential  energy only in vertical position.   I don't  know  whether it will really work.     Unless we build it,  we will not know the exact problems.
Regards,
Vineet.K.

[Airstriker]

I didn't notice that excel sheet vineet - indeed this is the same design. However, in it's current form it won't work - it will reach an equilibrium and stop rolling - just as in your experiment.
But...


How about the design from the picture below ? It's supposed to work more like a pendulum, never reaching vertical orientation because of the bumper attached to the frame at the top. This alone however will also reach equilibrium. What must be done, is a sort of latch mounted at the top of the frame and being released only when the baloon reaches the top position in the tube. This way the tube should get enough momentum to avoid equilibrium and lock another latch on the other side of the frame. Note, that the latches are not drawn in the picture.
Hope you can understand my idea - if not please ask.