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ICE test train reaches speeds of up to 405.0 km/h

(www.deutschebahn.com)
113 points doener | 2 comments | 29 Jun 25 22:43 UTC | HN request time: 0.513s | source
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KingOfCoders ◴[30 Jun 25 04:08 UTC] No.44419260[source]▶
Amdahl's law in effect - which is the reason trains in Germany top out at 300 and most at 250.
replies(2): >>44419540 #>>44419868 #
1. simonebrunozzi ◴[30 Jun 25 04:55 UTC] No.44419540[source]▶
Re-read it, as I didn't recall it properly: [0]

"the overall performance improvement gained by optimizing a single part of a system is limited by the fraction of time that the improved part is actually used"

[0]: https://en.wikipedia.org/wiki/Amdahl%27s_law

replies(1): >>44419781 #
2. KingOfCoders ◴[30 Jun 25 05:36 UTC] No.44419781[source]▶
Thanks for the quote, Germany has (too) many stops on the ICE lines (often for political reasons) and those are the limiting factor, not the top speed. The best train in Germany is Berlin->Frankfurt, not because of the speed, but the "Sprinter" version does not stop.