beagle9
Diamond Member
- Nov 28, 2011
- 44,159
- 16,465
- Thread starter
- #121
. How did this go from passenger trains to freight trains ?No, you clearly DON'T understand the consequences of the extra weight. That being: the much-heavier freight trains need stronger railbeds, bridges, etc...and simply cannot go as fast. A passenger train might take a section of track at 80MPH...where a freight on the same stretch might have to take it at 50 or slower to avoid damaging the track, or even risking a derail. The weight also requires more fuel...to double the speed, you need to-at least-quadruple the power. (Also, freight trains are much less streamlined than passenger trains.) Running high-speed freight trains would require tearing up and replacing every foot of rail they run on! (There are over 100,000 miles of rail that would have to be replaced.)
Here is something to ponder: how much space would a 2-mile-long freight train need to stop from 140MPH? Remember: doubling the speed will roughly quadruple the stopping distance.