Need help with gravity/buoyancy design

[Tarsier_79]

Hi Novus

As I mentioned before, I didn't as yet share the idea on the counterbalance to keep V weightless.

I believe you will find that when using the method to counterbalance V as per the 'Example' given earlier (with the 2nd pulley at twice the distance from the pivot point) you will find a loss equal to the gain in potential gravitational energy of mass M.

So you have an additional counterbalance for the V weight?

[Tarsier_79]

I have been thinking about the V counterweight. I believe there is a method to counterbalance it with a variable proportional weight.

In #3, the water level raises 12, then 12. The V weight is dropped 8, then 16.
In #5, the water level drops 12, then 12. The V weight is lifted 8 then 16.

The leverage occurs in reverse on the lift and drop. At least the total lift and total drop heights are the same.

A pure mechanical variable solution will be difficult, but probably possible. A simpler (at least for me) method is to have two counterbalance that can occur at different times. We can engage each one when required with a microcontroller. I believe your system already requires one to swap between "scenarios".

[Novus]

Hi Tarsier,

As it turns out my idea for a counterbalance to keep V weightless at each interval doesn't work.
I'll have a look at you proposal but, since we already agreed that a buoyancy/gravity perpetuum mobile does not and can not exist, I somehow doubt this will work.
I guess we agree that, if only we can find a counterbalance for the part of V at each interval which is not submerged, the system should work.

[Tarsier_79]

Novus, the solution you proposed initially is unique and interesting. Although I believe a gravity solution is not possible, I try to keep an open mind to an extent, and won't mind finding out if I am wrong.

I believe your method of counterbalance can work in proportion. Both proportions separately.

[Novus]

I believe your method of counterbalance can work in proportion. Both proportions separately.

I'm working on a solution which looks promising as per your suggestion. If it works I'll be forwarding the details later today/tomorrow.