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11 votes

Could a mainspring be used to generate train acceleration during starting-up from the kinetic energy stored during its slowing down?

On the London Underground, many stations use gravity. The line runs uphill into the station, and then departs downhill. This gives a large amount of energy storage, for free, with no additional moving ...
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4 votes

Could a mainspring be used to generate train acceleration during starting-up from the kinetic energy stored during its slowing down?

Mechanical energy recovery has been tried on rapid-transit systems, in the form of flywheel storage. This is known as KERS in the motorsport world, but usage on a railway requires much higher ...
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2 votes

Could a mainspring be used to generate train acceleration during starting-up from the kinetic energy stored during its slowing down?

Existing systems for trucks use hydro-pneumatic accumulators as the springs. As Eaton Corp said in 2010: "The system is best suited for vehicles that operate in stop and go duty cycles such as ...
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7 votes

Could a mainspring be used to generate train acceleration during starting-up from the kinetic energy stored during its slowing down?

Note also that springs are subject to eventual (and very sudden) failure as they develop cracks with age and a very sudden 5.6MJ energy release inside a railroad car would be exceptionally dangerous!
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19 votes
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Could a mainspring be used to generate train acceleration during starting-up from the kinetic energy stored during its slowing down?

I found that on some Spanish lines, the kinetic energy during braking is converted to electricity and used by other trains from the same line (research paper), but why not keeping the mechanical ...
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