Need help with gravity/buoyancy design

[Novus]

How does D move up and down to compensate?

Container D does not move up or down but stays in a fixed position.
The change in fluid level in D is as a result of C moving upwards (as per the string on the pulley) and the fluid level equalizing through the connecting tube at the bottom of C and D.

As soon as you add the second set of pulleys so the containers move up and down it adds another level of complication

This is only for the example and is not how the part of V not submerged in the design will be balanced.

[Tarsier_79]

Everything you have drawn is easy enough to reproduce if you have the will to do so.

Here is a link to one of my last buoyancy tests.
https://www.besslerwheel.com/forum/viewtopic.php?p=177387#p177387
I have attached a pic below.

I then up-scaled the principle to a new model

[Novus]

Unfortunately I have no skills and would need to commision for someone to build this.
Besides I believe someone should be able to disprove this design based on the details provided.

I'm waiting for the login I've requested for the BW forum to be activated to have a closer look at your buoyancy tests.

Your build of the scaled up model looks really impressive...

[Tarsier_79]

I shouldn't have said buoyancy, more displacement.

You can make your structures out of layers of polycarb, don't use acrylic, because it will crack if you are not used to it. Glue them together with super glue. It is clear, so you can trace the shape from an enlarged graph paper model or printout. Clear tubing is cheap from the hardware store, as are fittings designed for irrigation. You can use the same method to build your pulleys. Alternatively if you are more computer savvy, you can get all or some of the parts 3d printed.

If you can simplify your principle to build a simple test jig, that may give you the answer you are looking for.

[Novus]

Thanks for your detailed suggestions, however I've come to accept that I'm really clusmsy when trying to build something.

You are of course right that from trying to build the design (even in a simplified version) I should be able to learn first hand where the mistake lies, however I'm afraid that, based on previous experience, the build would be so poor that the end result would only be wasted time and frustation.

Anyway, without an actual attempt at a build, it should probably not be hard to disprove the design for some of the forum members with an in dept knowledge about physics (in particular about mechanics and buoyancy)