Originally Posted by
AndyPatterson
Follow-up, to answer my own question, I see that the "new" Acela cars are definitely shorter than the cars in current use. The new cars have only 6 pairs of windows. That shorter length may allow them to take moderate curves at a higher speed, as opposed to the current Acela cars which have to slow down for moderate curves.
? Consider that the center of mass of the longer car on a curve would be inside that of the shorter car hence less centrifugal force. Any differences would be hardly measurable.