They were invented decades ago.

They have fewer moving parts than wheelbois.

They require less maintenance.

There’s obviously some bottleneck in expanding maglev technology, but what is it?

  • Iron Lynx@lemmy.world
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    1 year ago

    To compare our bullet points for maglev and high speed & conventional rail:

    • there’s a big step in price between “a railway line built to millimetre precision” and “a completely new type of infrastructure that may or may not need superconductors to work”
    • there are way more manufacturers for components of high speed rail. For rolling stock there 4 in Europe alone, plus more in Japan, South Korea and China. As for signalling, it depends on the underlying tech. And if we follow the current European tech standard, that encompasses a standard… That is made by multiple manufacturers, and where their systems are operationally compatible.
    • for one, high speed rail is still rail, so building at grade & laying them on the ground is trivial compared to maglev systems. While some maglev technologies must be built like a bit of a monorail, which must be built elevated everywhere. And if we step outside of high speed rail, and point to rail in general, the mere existence of level crossings and street running disproves the fact it can only be built grade-separate. Sure, level crossings for HSR are a reason for the planning engineer to get fired, but for rail in general, it can happen.
    • this depends on what is already there. Most high speed trains use standard gauge, and those that don’t, use broad gauge, and for that, only the Russian Sapsan comes to mind. If your country has standard gauge track, you can use the existing railway lines into town, disproving your point. And as for signalling, you can fit a train with multiple train protection systems, and many places are instead working towards using high speed signalling for general use, since the tech that makes high speed trains go BRR is the same tech that allows regular trains to run closer together. Finally, electrically, many countries use the same power on the wires on their high speed network as their general network.
    • I’ve seen footage of a set of switch points with a diverging speed of 160 km/h, and it needs 9 switch motors to work. Proper high speed switches need even more, last time I checked the adopted standard was diverging speeds of 220 km/h. However, these motors all work in parallel, so the difference in switching time is negligible compared to a more basic type for general use. And these points work by bending one rail a little bit out of the way, bending another rail into place, and for high speed, pushing the frog (image for clarity) to the other side. This all unlike maglev, where you need to invasively rearrange the whole track, the replacement of which is probably several metres away.

    High speed rail has enough compatibilities with regular rail to make sense.

    • Iron Lynx@lemmy.world
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      1 year ago

      To append, some examples of high speed systems with multiple manufacturers.

      🇪🇺🇬🇧: Eurostar has, for the Channel Tunnel, two types of train built by two manufacturers. The old type by Alstom, the new type by Siemens.

      🇪🇸: Just AVE has three different builders. The S-101 by Alstom, the S-102 by Talgo and the S-103 by Siemens. The S-102 is also used by Avlo, while OuiGo used Euroduplex sets by Alstom, and Iryo uses ETR 1000 sets built by Hitachi Italy.

      🇮🇹: The ETR 500 is built by a consortium of manufacturers, several of which have been absorbed by others. The ETR 1000 has been built by a chain of builders due to mergers n stuff. And the NTV units are built by Alstom.

      🇯🇵: Pretty much every major manufacturer of rolling stock has built at least some Shinkansen units. You’ll find trains by Hitachi, Mitsubishi, Kawasaki and others all over the network.

      🇨🇳: The first generations of CHSR trains were all imported designs, derived from others, both Shinkansen and European types. This allowed them to kickstart a domestic rolling stock industry for later generations of train.

      🇨🇭: Once we lower our standards of speed a touch, SBB uses two types, one by Alstom built in Italy, one by Stadler built domestically. And trains from neighbouring networks ride into particular areas, each of which has their own builders.

      • kalleboo@lemmy.world
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        1 year ago

        Maybe the new Japanese maglev Chuo Shinkansen will help - they’ve already had Mitsubishi, Nippon Sharyo (JR) and Hitachi build test trains for them