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| NH EP-4's under construction (1304129) | |
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| (1304129) | |
NH EP-4's under construction |
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Posted by Dave on Sat Jul 26 03:38:58 2014 
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Re: NH EP-4's under construction |
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Posted by VictorM on Sat Jul 26 03:46:01 2014, in response to NH EP-4's under construction, posted by Dave on Sat Jul 26 03:38:58 2014. One of my favorite locomotives. Thanks for finding this. |
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Re: NH EP-4's under construction |
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Posted by Dave on Sat Jul 26 04:49:09 2014, in response to Re: NH EP-4's under construction, posted by VictorM on Sat Jul 26 03:46:01 2014. You're welcome. The shot was taken at the GE plant. |
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Re: NH EP-4's under construction |
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Posted by chud1 on Sat Jul 26 04:49:28 2014, in response to NH EP-4's under construction, posted by Dave on Sat Jul 26 03:38:58 2014. A+ on this picture.chud1. :).... |
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Re: NH EP-4s under construction |
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Posted by Olog-hai on Sat Jul 26 08:14:44 2014, in response to NH EP-4's under construction, posted by Dave on Sat Jul 26 03:38:58 2014. Pity those didn't last as lnog as the GG1s. Were they victims of the McGinnis de-electrification madness? |
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| (1304152) | |
Re: NH EP-4's under construction |
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Posted by Fred G on Sat Jul 26 08:21:51 2014, in response to NH EP-4's under construction, posted by Dave on Sat Jul 26 03:38:58 2014. That's awesome! Thanks Dave!your pal, Fred |
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Re: NH EP-4's under construction |
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Posted by seabeachexpress on Sat Jul 26 09:50:38 2014, in response to NH EP-4's under construction, posted by Dave on Sat Jul 26 03:38:58 2014. Nice..look at the size of those traction motors! |
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Re: NH EP-4s under construction |
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Posted by Chris R16/R2730 on Sat Jul 26 10:12:03 2014, in response to Re: NH EP-4s under construction, posted by Olog-hai on Sat Jul 26 08:14:44 2014. McGinnis always favored the FL-9's, |
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| (1304176) | |
Re: NH EP-4s under construction |
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Posted by Fred G on Sat Jul 26 10:25:30 2014, in response to Re: NH EP-4s under construction, posted by Chris R16/R2730 on Sat Jul 26 10:12:03 2014. Yeah, when diesel is cheap and your only electrical power plant is overtaxed, then why not?your pal, Fred |
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| (1304177) | |
Re: NH EP-4s under construction |
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Posted by Chris R16/R2730 on Sat Jul 26 10:29:27 2014, in response to Re: NH EP-4s under construction, posted by Fred G on Sat Jul 26 10:25:30 2014. Just be happy he never got his way with the removal of wire east of Stamford. Can you imagine having to use push pulls on this line today? |
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| (1304179) | |
Re: NH EP-4s under construction |
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Posted by Olog-hai on Sat Jul 26 10:31:57 2014, in response to Re: NH EP-4s under construction, posted by Chris R16/R2730 on Sat Jul 26 10:12:03 2014. Indeed. How many rebuilds did they get before they were retired? |
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| (1306438) | |
Re: NH EP-4's under construction |
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Posted by Jersey Mike on Wed Aug 6 07:39:12 2014, in response to NH EP-4's under construction, posted by Dave on Sat Jul 26 03:38:58 2014. What advances in technology allowed locomotives to do away with having both driving and non-driving wheels? |
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| (1306451) | |
Re: NH EP-4's under construction |
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Posted by Terrapin Station on Wed Aug 6 08:25:18 2014, in response to NH EP-4's under construction, posted by Dave on Sat Jul 26 03:38:58 2014. Cool! |
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Re: NH EP-4's under construction |
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Posted by Terrapin Station on Wed Aug 6 08:25:29 2014, in response to Re: NH EP-4's under construction, posted by Jersey Mike on Wed Aug 6 07:39:12 2014. Long live the 4-8-4! |
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| (1306690) | |
Re: NH EP-4's under construction |
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Posted by Bill West on Thu Aug 7 04:09:13 2014, in response to Re: NH EP-4's under construction, posted by Jersey Mike on Wed Aug 6 07:39:12 2014. The development of the diesel eliminated Cleveland Union Terminals' electrification.The reassignment of those electrics to GCT justified increasing the weight capacity of the Park Avenue viaduct. This happened just in time to allow GE to design the EP-5 with all the equipment weight on only the 6 drivers. That allowed using C-C trucks from diesels instead of big cast frames. At the same time the Ignitrons allowed using diesel DC traction motors. Much cost saving from the common parts. All per a contemporary IEEE paper. Sounds like the butterfly effect doesn't it. Actually there had to have been an improvement in the ability to design, balance and stabilize the chassis for speed. The pony truck+driver DD1 was created because PRR testing continued the points NYC S motors and NH EP-1's had made about symmetrical unit designs being bad for nosing. L5's, P5's and GG1's just continued that conclusion, diesel E units and the EP-5 finally countered it. Maybe it was the E unit's Blomberg truck showing that double equalization was worth the complication that did the trick. Bill |
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| (1306691) | |
Re: NH EP-4's under construction |
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Posted by Olog-hai on Thu Aug 7 04:12:46 2014, in response to Re: NH EP-4's under construction, posted by Bill West on Thu Aug 7 04:09:13 2014. The development of the diesel eliminated Cleveland Union Terminals' electrificationProbably not. Like just about all anti-railroad technology (and this is one to a degree), there was government intervention. |
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Re: NH EP-4s under construction |
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Posted by Olog-hai on Thu Aug 7 04:13:19 2014, in response to Re: NH EP-4s under construction, posted by Chris R16/R2730 on Sat Jul 26 10:29:27 2014. Definitely no Acelas to Boston. |
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Re: NH EP-4's under construction |
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Posted by SelkirkTMO on Thu Aug 7 04:15:48 2014, in response to Re: NH EP-4's under construction, posted by Olog-hai on Thu Aug 7 04:12:46 2014. Hahahahaha! When I saw you had posted, I had a feeling.Bill's explanation is wonderful. |
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Re: NH EP-4's under construction |
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Posted by kp5308 on Thu Aug 7 09:15:20 2014, in response to Re: NH EP-4's under construction, posted by Bill West on Thu Aug 7 04:09:13 2014. Thanks for the description Bill!When the EP4 was built in '38 the prevailing wisdom was that the locomotive needed an unpowered lead truck to "steer" the unit thru a curve at high speed like a steam engine. The A1A truck (2 traction motors on the outer axles with an unpowered center axle) was still an unproven concept at the time, considering the EMD EA was only on the road for a few months at this point & the carriers were still not sold on the concept. |
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