gravity-buoyancy underwater wheel

[Rafael Ti]

haven't figured out how it works, though keep checking the design to see if they somehow transferred the weight from the vertical beams to a longer horizontal beam to increase leverage when the weight is disconnected from the roberval vertical beam.
tried variations of the idea myself, though no gain as it took the same amount of work to lift the weight back from the longer lever onto the vertical beam.

Our Brazilian friends probably use the idea of Roberval balance in conjunction with classic weight scale. I have also some ideas about how to bring weights back to initial position. One of them is to let the system work like pendulum... in right time you switch system from Roberval to classic and then back.
By now I am in stage of making rotational Roberval using chains and chain wheels. Will see what can I do with it...
All the best Mr roberval

[roberval]

By now I am in stage of making rotational Roberval using chains and chain wheels. Will see what can I do with it...
All the best Mr roberval

Rafael,
do you mean making a similar system to the roberval balance by using a chain and sprocket system, with the center sprocket being grounded ?
Played around with these as well, even tried a pendulum on the center sprocket. 
it's an easier build compared to building a roberval balance.

[Rafael Ti]

Yes, exactly! Something like this:

[Low-Q]

Yes, exactly! Something like this:

I assume the horizontal lines are the weights that is overbalancing?
If so, you must remember that these weights are rotating in the opposite way relative to the rotation of the moving sprockets. This rotation is required to force the horizontal weights to stay horizontal, pointing to the right. That will require the exact same amount of energy as the energy "gained" by the overbalance. The horizontal weights want to rotate counter clockwise, but the overbalance want to rotate clockwise. Force equals counterforce.


Therfor such wheels cannot work. Fairly simple math will prove this also.


Vidar

[Rafael Ti]

@Vidar
The rotary Roberval is only a base for more sophisticated system. Of course the Roberval balance alone is not a gravity wheel. It needs something else to work as such a wheel. This is what Mr roberval - the member of this forum and others are thinking about. Think for example how easy is to move the weights on horizontal beam.. how easy is to switch the system from Roberval to a classic scale and then back again.

"Therefor such wheels cannot work..."

So let's take it as a hobby. Are you happy?  People waste their time doing many stupid things...

All the best