Mechanical resonant oscillation as basic overunity method

[Willy]

A quote from perpetual
"Spindle has 10kg but due to air chamber inside it has -10kg in water."
The end of that quote

When empty of water, the spindle has a weight of 10 kg while outside of the water.
When the spindle is full of air, its weight when fully immersed in water is - 10 kg.
The -10 kg is 100% removed from the10 kg of the spindle, due to buoyancy in water.
              Therefore...
The spindle body itself is 100% buoyant in water.

                              Good ! Simple math.

The spindle body itself must therefore be less dense than water.

It does not matter if the spindle body weighs 10 kg or 100 kg, if it is less dense than water
it will float in water.  The spindle will not sink to the bottom of the tube even when the
spindle is full of water. 

You have insisted upon making this into a competition.
That is not my goal here.
Sorry bud.  This is not much fun for me. 
It is poor form on my part, to have entered into a battle of wits with an unarmed opponent.

[perpetual]

Loooool what a circus.

You have just made a convoluted nonsensical mess and basically concluded that steel ship will float even when filled with water.

Bravo, applause. Lol

Nix

[Willy]

A steel ship is not 100% buoyant even though it is full of air.

A ship made from plastic that is less dense than water will still float a little bit,
even when it is full of water.  Like a plastic water jug full of water floats.

[perpetual]

Obviously anything less dense than water will float in water, but how in the world did you conclude steel is less dense than water lol

Steel is more than 8 times denser than water

[Willy]

No ship with its hull made of steel, can be 100% buoyant in water.
It may float in water, but a part of its hull will be below the water line.

Only a ship, in which the ships hull itself is 100& buoyant, can be 100% buoyant.

The spindle you described was 100% buoyant.  It cannot the be made of steel or any thing
else that is more dense than water and still be 100% buoyant in water.