Author Topic: Hydro Gravity Roller (Read 24251 times)

vineet_kiran · « **Reply #15 on:** March 17, 2012, 02:32:21 AM »

Quote from: AlanA on March 16, 2012, 08:28:28 PM

@ Vineeth,

Is it possible to post some photos from your researches?

Greetings
AlAn

@AlanA

Taking photos and making videos is a bit luxurious affair for me. Anyway give me some time, I will try to make a video and post it here.

Regards,

Vineet.K.

vineet_kiran · « **Reply #16 on:** March 17, 2012, 05:23:57 AM »

@AlanA

Meanwhile if you are too much interested in this experiment, you can try this:

AlanA · « **Reply #17 on:** March 17, 2012, 06:20:23 PM »

@ vineet

Thanks very much for you file.
Ok, when it works in water it must work with air/helium. The point is that the body which get lifted in water must be lighter than the ambient area. So it is logical that the same principle works with air and helium. What makes me thinking is: Why does the air/helium version needs a container? I think this is not necessary.

AlanA · « **Reply #18 on:** March 17, 2012, 06:24:29 PM »

@ vineet

Sorry, just have read you comment where you have given the answer.

andrea · « **Reply #19 on:** March 21, 2012, 10:34:15 PM »

@ Vineeth,
in your test with the roller, does it rolls always in the same direction? It seems to me that it could roll on both sides, there's nothing that forces the roller in one direction or the other. Regards

vineet_kiran · « **Reply #20 on:** March 30, 2012, 04:39:48 AM »

Quote from: JEJEHO on March 14, 2012, 12:14:29 PM

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 · « **Reply #21 on:** March 06, 2013, 04:11:16 AM »

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

Airstriker · « **Reply #22 on:** March 07, 2013, 11:26:03 AM »

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 · « **Reply #23 on:** March 07, 2013, 01:25:44 PM »

@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 · « **Reply #24 on:** March 08, 2013, 11:20:43 AM »

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.

vineet_kiran · « **Reply #25 on:** March 08, 2013, 02:49:54 PM »

@Airstriker

Nice diagram. Releasing the latch at maximum potential energy is a good idea.
But in that diagram just imagine the force acting due to balloon. A hydrogen balloon always tries to move in upward direction perpendicular to the ground and not in the direction of shaft axis carrying the weight. This upward force of the balloon acts on the bearing and tries to slow down the momentum of shaft falling down along with weight. The upward force of the balloon will be maximum when the rotating shaft comes to horizontal position. At this point the balloon trying to move upwards perpendicular to the ground will greatly reduce the momentum of falling weight. Hence this may come to equilibrium at some point or the other end will not have enough momentum to stick on to a latch.
Anyway it is difficult to imagine and as I said we have to build and see.
Regards,
Vineet.K.

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