Is it any different than what I have suggested on Jan 20,2007 in my idea about TURBO TRAINS. Though the word TURBO was wrong, please replace it with Generator system and study it.

It differs in many ways,

My suggestion is making use of a geared generator system which is applied when the brakes are, on ANY vehicle, to aid BRAKING and power GENERATION.

Your idea is a turbine applied to a train when it reaches a peak speed, which is harnessing the trains essential kinetic energy to keep it moving and turning it into electric. I'm sorry, I only see similarity in the fact that they both produce electric. You definately identified potential but applied a "solution" which was not only wrong, but, due to the nature of thermodynamics, (which I no nothing of really), would be a burden using more fuel inturn creating more pollution.

Apologies if I appear harsh or even condesending, I mean not to, as I know you set off with very good intent.

Please read my idea proposedon Jan 20 again. The heading is GEN-RAIL 2

Here is the concerned clip for your ready refferance

<<<In theory, no matter which type of energy it consumes<coal,diesel or electricity>, I feel it is always possible to steal back some extra power from this monsterous vehicle. For example:- power which goes waste when it brakes to stop and power which goes waste when it glides down on slopes and so on.

In other words, the major braking application can be replaced by power generating. This means, that whenever you want to slow down, you attach more and more generators to wheels to slow it down.>>>

With the only difference that you chose for a geared generator and I have suggested to increase the number of small generators, taking into consideration the installation simplicity, easy to produce, easy maintenance and affordability by poor nations.

The given idea has no limitations, though at that time it was mentioned in coherence with <train transport system.> But it clearly says

<In other words, the major braking application can be replaced by power generating.>

Creo, you have reinvented regenerative braking. Regenerative braking has been used for decades on electric cars and is used on many hybrids. It's most practical on cars with electric drive motors because the motor itself can be used as a generator.

BTW, electric cars are not light. In fact, they tend to be unusually heavy due to the batteries.

It is called regenrative braking, a concept used in many electric vehicles.

I didn't realise such a system was in use, apologies, I just took a logical step from what I have seen on whynot.

Sorry Naresh aswell, mis-interpreted your idea somewhat, placing it in the same genre as the "car wind generator's" I have seen...

Now that so many of us agree that regenerating energy is very much possible thru braking, we must suggest the spheres where it can be used most efficiently and where it is more cost effective.

As I suggested, trains, specially metros are the best bet in my view. I have already gone a step further in suggesting this idea to one know who is a engineer turned politician to suggest it further to the Govt. of India.

I have also suggested the Airport Charity idea ( from this site ) to Red cross people.

My Smart Roads and Highways idea has also been sent to IIT ( Indian istitute of Technology) for further consideration and eventual testing thru Students <practical> projects.

Though electric cars when they count in good numbers in future would also be a good opportunity.

Anybody who can suggest a specific tech know-how site on this on internet?

Don't Hybrids already do this?

great idea, not a new idea but a great ideawith some limitations you might not appreciate

http://en.wikipedia.org/wiki/Regenerative_brake