tag:blogger.com,1999:blog-6609536178570975752.post8984470302652496400..comments2024-01-12T00:32:20.149-08:00Comments on The Overhead Wire: A Small ChargePantograph Trolleypolehttp://www.blogger.com/profile/17833159138533550544noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-6609536178570975752.post-44595201363493674332009-10-30T14:07:53.531-07:002009-10-30T14:07:53.531-07:00There's no good reason *not* to use overhead w...There's no good reason *not* to use overhead wires on most trains; if you can justify a high-capacity train line economically, you can justify the overhead wiring. I would expect batteries and ultracapacitors to be used on trains purely for cruising through phase gaps and across junctions, and similar areas where the overhead wiring could truly be complicated and trouble-prone. (Switching engines are actually a good example, because they live in an environment consisting of nothing *but* switches.)neroden@gmailhttps://www.blogger.com/profile/07475686367097445497noreply@blogger.comtag:blogger.com,1999:blog-6609536178570975752.post-7782699645678377512009-10-26T15:04:51.879-07:002009-10-26T15:04:51.879-07:00clever-title: if a train is more efficient than a ...clever-title: if a train is more efficient than a bus per tonne-mile, then surely it would take less energy relative to the vehicle size.unclever-titlenoreply@blogger.comtag:blogger.com,1999:blog-6609536178570975752.post-66212308831863325792009-10-22T17:11:10.119-07:002009-10-22T17:11:10.119-07:00I think you might get into a catch-22 when it come...I think you might get into a catch-22 when it comes to traditional commuter heavy rail. The energy required to get a loaded train moving maight be so great that the energy store would take up too much room to leave room for passengers.clever-titlenoreply@blogger.comtag:blogger.com,1999:blog-6609536178570975752.post-42106790662606590742009-10-20T15:10:10.425-07:002009-10-20T15:10:10.425-07:00Ohhh, this makes sense. Buses and trains usually ...Ohhh, this makes sense. Buses and trains usually have relatively long scheduled dwell times at a small number of stations, which matches the "charge for 5 or 10 minutes at a few places" methodology.neroden@gmailhttps://www.blogger.com/profile/07475686367097445497noreply@blogger.com