gravity-buoyancy underwater wheel

[roberval]

would this work ?

the wheel is completely submerged underwater.
it consists of A legs, with one leg containing a float (light blue) and the other a weight (red).
the buoyancy of the float is equal to the downward force of the weight .

as the wheel rotates, the A-legs " in the 1:30 position on the top right side in pic 1" start to open due to the float being on the upper arm of the A-leg, and the weight on the lower arm of the A-leg.

the A-legs on the opposite side of the wheel " in the 7:30 position on the lower left side of pic 1" start to close due to the weight now being on the upper A-leg arm, and the float on the lower arm of the A leg.

what hasn't been included in the diagram is the secondary mechanism that the arms move to create overbalance as the arms move in and out.

the floats and weights would be more forceful  than the secondary "overbalance" system it moves.
e.g. 10 liter float filled with Air on one of the arms of the A-leg pair, 10 kg weights on the other arm of the A leg to lift 5kg on the secondary system, to create an overbalance for rotation

pic 1. shows a basic design with 4 pairs of A legs with weights and floats.
pic 2. is a 180 degree mirror image of the design in pic 1 and runs on the same axle.
pic 3. the combination of pic 1-2 running on the same axle.

[roberval]

Added another pic that basically shows a system of weighted arms that would be moved by the A-legs system.
had not included them in the previous post, as the system shown in the previous post that shows a mechanical system that stays in balance when turned 360 degrees, and stays in balance during the movement of the opening and closing of the A-legs.
The movement of the A-legs could be used with a variety of systems to create the overbalance or rotation of the wheel.
e.g. hydraulics, pneumatics  e.t.c.

[Low-Q]

would this work ?

No. General physics applies to the buoyancy effect as well. Something has to give if something is gained.
You can make it work if you apply different temperatures in the water to the left and right. This will change density on both sides, but you have to keep applying energy to make that happen.


So what you have designed is a wheel that conserves energy perfectly ;-)


Vidar

[roberval]

Vidar,
attached another variation of the design, as the 2 halves of Pic 1 and Pic 2 are joined on the same axle
with the result being what is shown in pic 3 without showing the secondary system

Pic 4 is only showing 1 half of the system which is basically showing sliding weights in pink that the A-legs move to create the overbalance.
Starts to get a little too complicated when trying to show several devices in a 2 dimensional drawing.

pic 5 shows the position of the open and closed pair of A-legs as it is every 90 degrees.
it consists of 8 pairs of A-legs with 8 floats and 8 weights.

when the wheel turns 90 degrees CW the No8 pair of legs start to open as the float is now on the upper leg, and the weight on the lower leg.
the no 7 pair of legs start to close, as the float is now on the lower leg, and the weight is on the upper leg.

the no 3 pair of legs start to close, as the float is now on the lower leg, and the weight is on the upper leg.

the no 4 pair of legs start to open, as the float is now on the upper leg, and the weight is on the lower leg.

2 pairs of the legs "180 degrees apart" can perform work together when they open or close.
if the weights were 1 kg and the buoyancy of the floats are equal to the downward force of the weights  e.g. 1 liter air filled float plus the extra needed to balance the weight of the A-leg arm, the float shell  e.t.c.
the 2 pairs of A-legs would produce 2kg lift, and 2kg down force when they open or close.

checked out the difference in buoyancy due to depth, if the wheel is only 1 meter from end to end, the lowest floats would have about a 10% increase in buoyancy compared to the top float, though as in the example above if the 2 pairs of A-legs has a 2kg upward force and 2 kg downward force they should easily be able to lift a 1 kg weight, which would create much more overbalance compared to about 200grams of difference in buoyancy caused by the 2 lower floats.

if i were to manually rotate the wheel 90 degrees, 2 pairs of A legs would open, and another 2 pairs of A-legs would close, with the result being the same position as in Pic 5, which looks balanced.

the secondary system that creates the overbalance has not been included in Pic 5, as it starts to get too complicated on a 2D drawing, besides the secondary system is just a matter of simple mechanics or a variety of other systems that could produce rotation.
The main point of the system shown in Pic 5 is that it stays in balance during rotation while 2 pairs of A-legs open, and another 2 pairs of A-legs close which can be used to perform work on the secondary drive system which turns the wheel.

[Rafael Ti]

@roberval
There are less complicated ways to check gravity - buoyancy wheels. I don't say your design is bad, of course.


All the best.