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How do 20,000-ton trains stop on steep mountains without destroying their brakes?
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Tech
Transcript
00:00200 loaded iron ore cars plunge down the mountain right now.
00:04Normal brake pads would instantly catch fire and melt under 20,000 tons of rolling steel.
00:10Common sense says friction stops the train,
00:14but physical friction would completely destroy the entire wheel assembly.
00:18Electric motors reverse their spin into heavy generators,
00:22turning immense gravitational kinetic energy into pure electrical heat.
00:27Giant roof grids blast glowing heat into the sky,
00:31while 200 loaded iron ore cars plunge down the mountain right now.
00:36Any age, any background, same opportunity, sell, earn, repeat.
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