12 times more output than input, dual mechanical oscillation system !

[Machi]

Great thing. I didnt saw something like this soon.
Like it. 
It can change the world. Interesting.
Everything is practically and technically feasible. Support your work
   
Why close science in the box?    
Then cant be developed. This is much better for all

[Charlie_V]

Could someone please post a correct calculation of energy from an experiment with one of these systems?  I tried reading the pdf someone posted but it is hard to follow since it doesn't detail the experiment very well, I'm not sure what "energy for third 32 amplitudes" means?  Is he taking an average of 32 runs at the third swing? 

This device is what is called a "parametric oscillator".  Using Milkovic's device, the lever mass oscillates at twice the frequency of the pendulum.  By definition, when this happens in a parametric system, energy is absorbed at a rate proportional to what the system already has.  So, although letting the pendulum swing down will give you the correct value of energy, it defeats the purpose of the device. 

[TinselKoala]

Could someone please post a correct calculation of energy from an experiment with one of these systems?  I tried reading the pdf someone posted but it is hard to follow since it doesn't detail the experiment very well, I'm not sure what "energy for third 32 amplitudes" means?  Is he taking an average of 32 runs at the third swing? 

This device is what is called a "parametric oscillator".  Using Milkovic's device, the lever mass oscillates at twice the frequency of the pendulum.  By definition, when this happens in a parametric system, energy is absorbed at a rate proportional to what the system already has.  So, although letting the pendulum swing down will give you the correct value of energy, it defeats the purpose of the device.

Here's a starting point (scroll down for the kinematic calculations):
http://physlab.net/dbl_pendulum.html

[Charlie_V]

@TinselKoala

I don't think a double pendulum describes this device very well.

The design is more closely related to this I do believe:
http://www.physics.uoguelph.ca/applets/Intro_physics/kisalev/java/pend2/index.html

Apparently in the link you gave, one page over is a spring pendulum.  This is the simplest parametric oscillator.  Milkovic's device functions similar to when you let the spring pendulum fall in such a way that it makes a U (not chaotically like when you first see the demo). 

I think gravity does the parametric pumping, all the operator must do is keep the pendulum swinging.  This device has two regimes, without a load on the lever it acts as a parametric pendulum, but if the lever is overloaded (so that it can't move), the system operates as a standard pendulum.  Someone has to apply an initial energy but then it takes every little to keep it going.  Yet because of gravity, the lever tends to continue to "reuse" the initial input. 

I'm still trying to learn more about parametric oscillators.  A child on a swing is one example, the other examples I've seen are using a rope to lengthen a pendulum's rod as it swings down then shorten the rod as it goes up.  Milkovic applies the technique backwards.  He uses centrifugal force of the pendulum's kinetic energy to lift the lever up - which i think is much more clever since now all the operator must do is keep replacing the leakage energy in the pendulum (otherwise it "radiates" away due to pivot friction and wind resistance). 

Once the pendulum is in motion, if you could apply a stronger force to the lever, so that as the pendulum is falling downward you cause the pivot point to raise up, you can damp the pendulum's movement.  But just think what that force would have to be?  Plus, loads on the lever wouldn't do that anyway.  They will try to stop its movement, not retard it in the opposite direction.  Thus, the loaded lever should not be able to damp the pendulum.  An overloaded lever would cause the pendulum to move out of the parametric regime and function as a simple pendulum. 

So energy in the system may be very different from the point of view of where you stand.  I think so far BOTH analysis are correct.  If you look at only the energy required to keep the pendulum swinging verses the energy output, you will have overunity.  However, if you take into account the INITIAL energy it took to place the pendulum at a certain amplitude PLUS the required leakage reducing energy, you should find the system operates below unity (because of losses).

But like I said earlier, letting the pendulum swing down defeats the purpose of this machine - but will give you the total energy of the system, which is conserved.  I think the idea is to input a large amount of energy into the pendulum, reduce the pivot resistances as much as possible, and then add a small amount of energy to keep it going for a long time.  I'm not sure what happens if you "close the loop".  Does it lock into a perpetual motion type device?  Do the losses of the system eventually get the better of it and cause it to stop?

Its an interesting idea to say the least.

Charlie

[TinselKoala]

This is not a double pendulum, it is a parametric oscillator.  I think the equations are slightly different.

I hope so!
You could try starting here, then.
http://faculty.ifmo.ru/butikov/Applets/ParamE.html
http://glass.phys.uniroma1.it/dileonardo/Applet.php?applet=ParamResoApplet
http://www.phy.ntnu.edu.tw/ntnujava/