"Free energy" and "Overunity" We need a definition.

[Aman Shah]

In real life the amount of energy that can be recovered is less, as there are always losses due to friction (ultimately lost as  heat)

Neither I denied this in my Article on Blog.This is just a case study.The real concept is for the other analogy,discussed in other article of the same Blog.Future generators/motors will be technologically highly efficient(atleast 80 percent efficient.)
I am well versed with basic concepts of Entropy.

[Aman Shah]

As the train descends the longer inclined path the resultant force acting in the direction of motion is less than the force of gravity acting in the vertical direction.  Integrate that lesser force over the longer distance and 'not so magically' you get the same result as if the train had descended vertically.

Sorry,that is not satisfactory explanation.we are putting more gravitational energy input,which is required for downward motion as well as energy recovery.Its the gravitational force that's causing motion as well as presence of fictional lost energy.
Gravitational energy downward has two components which make up resultant.One helps in movement of compartment along height.Other helps in movement of compartment in conjunction with height,along the Horrizontal.Here,Sign convention is not according to regular Cartesian graph.But both gravitational components should be negative.Cartesian sign convention is only for plotting graphs with EASE.
Graphs may not be always analogous to forces.Resultant =( -H )+ (-V) = -(H + V).
Quantitively,its only (H+ V).Negative sign indicates that gravity acts downwards.

If gravity acts only along vertical,how any thing will move horrizontally???
Hence gravity(loops of Gravitons I should say or loops of earth's magneic field I should say) also acts horrizontally.

[Aman Shah]

Actually, your ludicrous ideas demonstrate that you absolutely clueless about even the most basic concepts of mechanics and thermodynamics.

What do you meant by that Nonsense comment.Aren't you aware that Gravitational field is a Earth's magnetic field.and each magnetic field is a loop starting from one point and ending at other.
Only because of loop of North and South Pole,we have gravity with two components on the slope.

If gravitational field was not a loop,then nothing would have fallen through a slope.Then any object on a slope path would have been there without falling down,because there is a resistance vertically to oppose its falling down.

Take a look at this:
http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/magearth.html

See the pic there and you will come to know that gravity is not only unidirectional  (straight).
Better you go back to school and understand that earth's gravity is not only Vertical but its also converging to Horrizontal direction since the nature of earth's magnetic field is looped

[Aman Shah]

--Delete please,new comment section created by mistake--

[Aman Shah]

Yes,physicst are finding tough job to understand magnetism.But we cannot apply different types of machenics individually as per needed.Science is one and not many.And hence Quantum physicst are aiming towards "The theory of Everything" A single theory that explains everything in universe combining all the relations between all forces of nature.
But it's a Commonsense that when somebody is being pulled in one direction,he cannot move in other direction unless and Untill other external force acts on it.

I think that the concept of earth's magnetic field as loops is correct,but still mysterious.Even particles called "graviton" are mysterious.

I think the concept if Parallel universes is just Rubbish.Its also mysterious.
Have you heard about "parallel Universes" in Quantum Physics.
Quantum physics says there are 11 dimensions and not only 3 plus time.Whats your take on this?