Spring Coupling

[vineet_kiran]

These are very basic concepts that you can check out for yourself:

The product of force and distance moved on one side of a lever is, absent losses, the same as the product of force and distance on the other side of a lever. 

Coupling through different size pulleys, gears, etc, is just a rotary version of a lever.

I have already proven mathematically that your concept does not work as you claim.

I agree with that.

a) In a lever force gets magnified and distance gets reduced.

   What happens if in a lever force gets magnified and distance is not reduced?  - which is practically
   not possible

b) In gears and pulleys (rotary version of lever) torque gets magnified and speed gets reduced.
   What happens if in gears and pulleys torque gets magnified and speed is not reduced?

   Which is practically possible using a spring coupling.

   It is also possible by another method.  In the following link PDF file,  please see 'Mechanical analogy'
   
   http://www.overunity.com/10774/over-unity-by-reaction-helping-action/msg287484/#msg287484


   In your 'mathematical analysis'   you have considered only E (in) and E (out)  but not torque and speed.

[MarkE]

You postulate conditions that you cannot show to exist.  That is called fantasy.

[vineet_kiran]

You postulate conditions that you cannot show to exist.  That is called fantasy.

You conclude without verifying.  That is called ignorance.


I am not formulating any postulate.    I have posted the experiment in "Half Baked Ideas"  for discussion.

[MarkE]

Your postulate relies on the false notion that the average tension within the spring is not constant.   Basic physics teaches us that is false.  You are free to try and show that such a thing is possible.  Simply declaring fantastical ideas does not either make them true or worthy of debate.

Your assertion:

"When motor shaft is rotated, it rotates the generator shaft applying force at the end of larger diameter producing greater torque at the centre of generator shaft but the reactive force of generator flange acts on outer edge of motor flange since spring is flexible and cannot offer reaction force.  Hence you will get mechanical advantage depending on ratio of diameters of flanges with same speed."

Is wrong on multiple counts.  The spring conveys the same torque to the big end as the small end.  The tangential forces vary by radius.  The torque does not.

[vineet_kiran]

Your postulate relies on the false notion that the average tension within the spring is not constant.   Basic physics teaches us that is false.  You are free to try and show that such a thing is possible. 

A huge rotating wheel will have tremendous moment of inertia.  Hence once you set a huge wheel in rotation,  force to be applied on its outer edge to keep it rotating will be negligible. The tension developed in spring will be corresponding to this force only.  So, tension developed in spring and energy consumed for tensioning the spring are also negligible.  This will be taken care of by mechanical advantage.

Simply declaring fantastical ideas does not either make them true or worthy of debate.

What for this forum is there?   What for "half baked ideas"?

The spring conveys the same torque to the big end as the small end.  The tangential forces vary by radius.  The torque does not.

That happens only in case of rigid coupling.  If you tie a meter length rope to a pillar and apply tangential force at the end of the rope,  will the tangential force depend on the radius?  Whatever force you apply at the edge of the rope,  same force appears at the outer edge of the pillar. 

For rigid coupling  F(tangential) generator is less than F (tangential) motor depending on radius.

For spring coupling F (tangential) generator  =  F (tangential) motor,  doesnot depend on radius.   Hence torque will be magnified.