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| Re: Disabled New Jersey Transit train pulled into Penn Station (1304983) | |||
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Re: Disabled New Jersey Transit train pulled into Penn Station |
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Posted by Joe V on Wed Jul 30 19:40:22 2014, in response to Re: Disabled New Jersey Transit train pulled into Penn Station, posted by Olog-hai on Wed Jul 30 19:30:04 2014. Of course Amtrak can - they run 8 or 9 car trains of lightweight cars, that don't have to stop and go every 3 miles, on generally flat terrain.Traction is a completely different concept than horsepower, and there is more to it than weight. There was also a modest improvement in tractive effort from the ALP46 to the ALP46A. According to wikipedia: ALP44: Max: 7,000 hp or 5.2 MW Continuous: 5,790 hp or 4.32 MW Starting Tractive Effort: 230 kN or 52,000 lbf[1] Weight: doesn't say, but an AEM 7 is 101 short tons (90.18 long tons; 91.63 t) ALP46: 46, starting: 316 kN (71,000 lbf), continuous: 245 kN (55,000 lbf) at 50 mph (80 km/h)[4] 46A : starting : ~316 kN (71,000 lbf), continuous: ~ 240 kN (54,000 lbf) at 85 km/h (53 mph)[5] Weight 46: 198,400 lb (90,000 kg) 46A: 202,822 lb (91,999 kg): |
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