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### Author Topic: Sum of torque  (Read 139852 times)

#### EOW

• Sr. Member
• Posts: 383
##### Re: Sum of torque
« Reply #345 on: August 16, 2016, 01:03:31 PM »
I need a negative pressure, it is possible to do with an attraction from the left side.

All the device turns, even green line and yellow line.

« Last Edit: August 16, 2016, 11:14:49 PM by EOW »

#### EOW

• Sr. Member
• Posts: 383
##### Re: Sum of torque
« Reply #346 on: August 17, 2016, 08:09:45 AM »
laws 1/x^0.5 and 1/x^0.3
« Last Edit: August 17, 2016, 06:22:49 PM by EOW »

#### EOW

• Sr. Member
• Posts: 383
##### Re: Sum of torque
« Reply #347 on: August 17, 2016, 09:09:20 PM »
The idea is to use balls1 attract with a law of 1/d². In the container I put a lot of balls2 (empty) but not attract, if I was inside water under gravity I could say these balls2 are bubble with gas inside. I calculate the torque on the black arm around the green center, like balls2 give the complementary pressure I have no torque on the black arm around the green center. Now, the force in the green center is 1.5555 N and if I place the green axis at 11 meter from the center of rotation of the device I have 11*1.5555 = 17.11 Nm. But the torque on the left side is not 17.11 Nm it is 18.197 Nm. Look at the integrals.

The function is (1/3-2*(1/3^2-1/x^2))

#### EOW

• Sr. Member
• Posts: 383
##### Re: Sum of torque
« Reply #348 on: August 18, 2016, 09:36:24 AM »
Or maybe like that with disks or spheres, I think disks are better

The volume of the blue ball is:

H*H-((H/-2*R)²/sqrt(3)*2*pi*R²) = constant = 0.0931 H² with R the radius of the white ball, the result don't depend of the radius of the white ball.

There is a up force on the object. The disk (2d) 7.519 % than a square (don't forget white balls are quinconx) so I could say the up force is 7.519% of the up force without white balls.

I need a force of 7.5 % and the blue balls move down with 9.31 %

If I move the object down, don't forget each ball win an energy.
« Last Edit: August 18, 2016, 09:38:22 PM by EOW »

#### EOW

• Sr. Member
• Posts: 383
##### Re: Sum of torque
« Reply #349 on: August 19, 2016, 07:27:02 AM »
Forces change because blue balls can't access all the part between a circle and a line, it depends of the radius of the blue ball
« Last Edit: August 19, 2016, 06:35:01 PM by EOW »

#### EOW

• Sr. Member
• Posts: 383
##### Re: Sum of torque
« Reply #350 on: August 20, 2016, 12:00:35 AM »
I think the pressure on the white balls is higher because there is a part (J) where there is no balls between each white balls. So the result could be more negative.
« Last Edit: August 20, 2016, 12:00:47 PM by EOW »

#### EOW

• Sr. Member
• Posts: 383
##### Re: Sum of torque
« Reply #351 on: August 20, 2016, 12:27:20 PM »
I suppose the sum of forces at 0, so I need the parameter 's' with the container alone so I added the parameter 's' but now, with the object I can't have the sum of forces at 0...
« Last Edit: August 20, 2016, 07:43:32 PM by EOW »

#### EOW

• Sr. Member
• Posts: 383
##### Re: Sum of torque
« Reply #352 on: August 21, 2016, 07:47:16 AM »
I found the sum of forces at 0 in the containers without the Object X.

But not with the Object X.
« Last Edit: August 21, 2016, 07:01:06 PM by EOW »

#### EOW

• Sr. Member
• Posts: 383
##### Re: Sum of torque
« Reply #353 on: August 22, 2016, 07:38:20 AM »
I verified my calculations and I corrected a little the values. I take in account the area the green line don't attract. All in the device is static, nothing moves, it is the sum of forces that is not 0, so all the device can create or destroy an energy and move the CG alone.
« Last Edit: August 22, 2016, 06:28:21 PM by EOW »

#### EOW

• Sr. Member
• Posts: 383
##### Re: Sum of torque
« Reply #354 on: August 22, 2016, 10:29:21 PM »
I need to add a thin tube for each white disk to allow the pressure  of blue disks to be transmitted below. This lost a little.

If that can work like that, it could say it is possible to have a up force of buoyancy higher than the volume of water (under gravity with a container and water), and I don't need disks just a shape like I drawn. Block the parts between disks with a wall.
« Last Edit: August 23, 2016, 10:06:39 AM by EOW »

#### EOW

• Sr. Member
• Posts: 383
##### Re: Sum of torque
« Reply #355 on: August 23, 2016, 11:31:19 AM »
Rotate the Object X ?
« Last Edit: August 23, 2016, 10:19:46 PM by EOW »

#### EOW

• Sr. Member
• Posts: 383
##### Re: Sum of torque
« Reply #356 on: August 24, 2016, 01:51:35 AM »
If I compare the energy recover from a disk, half is a solid, the other half is air, I lost more energy in the water.
« Last Edit: August 24, 2016, 09:07:47 AM by EOW »

#### EOW

• Sr. Member
• Posts: 383
##### Re: Sum of torque
« Reply #357 on: August 25, 2016, 12:16:19 PM »
With the shape I described before.
« Last Edit: August 25, 2016, 11:55:59 PM by EOW »

#### EOW

• Sr. Member
• Posts: 383
##### Re: Sum of torque
« Reply #358 on: August 26, 2016, 10:51:44 AM »
like that

#### EOW

• Sr. Member
• Posts: 383
##### Re: Sum of torque
« Reply #359 on: August 28, 2016, 11:15:33 AM »
Maybe like that
« Last Edit: August 28, 2016, 10:35:29 PM by EOW »