General > General Technical Chat
The Hyperloop: BUSTED
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ebastler:

--- Quote from: MrMobodies on June 07, 2019, 01:14:24 am ---I read somewhere that they built 200 mphs? trains and tracks since the 1980's.

--- End quote ---

That's a rather hazy statement for an engineering forum (even the "General Chat" section)...  :P

You are probably thinking of the Japanese Shinkansen. These were first deployed even earlier, starting in 1964, but they did not start at quite that high speed. The original Shinkansen went up to 210 to 220 km/h, and later generations reached 320 km/h, i.e. 200 mph, in 2013.  https://en.wikipedia.org/wiki/Shinkansen
MrMobodies:
Yes the bullet trains.

Sorry about that I got it wrong and confused.

I have should have doubled checked and provided a quote which I will do next time.
GeorgeOfTheJungle:
Spain and France are full of high speed trains.
nctnico:

--- Quote from: GeorgeOfTheJungle on June 08, 2019, 05:21:01 pm ---Spain and France are full of high speed trains.

--- End quote ---
Agreed. The French hold the speed record for the fastest train. Both Maglevs and regular trains suffer from the same problem: air friction. At some point it isn't going to be (financially) efficient to run trains at high speed and that is where the hyperloop concept comes in. And you don't need a complete vacuum. The energy consumption goes down linear with lowering the air pressure. Half the pressure means a 50% reduction in the energy lost due to friction (I'll leave it up to the reader to look up the formulas for energy loss due to friction versus air pressure).
ebastler:

--- Quote from: GeorgeOfTheJungle on June 08, 2019, 05:21:01 pm ---Spain and France are full of high speed trains.

--- End quote ---

Sure, as well as Italy, Germany, some lines in the UK and Belgium, ...
https://en.wikipedia.org/wiki/High-speed_rail_in_Europe

My point was that the Japanese Shinkansen was the first, by a fair margin to my knowledge.
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