Rethinking HEP and LD power

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Re: Rethinking HEP and LD power

Postby Tadman » Thu Feb 21, 2019 9:48 am

DutchRailnut wrote:document you show is for dual modes only ( due to weight constraints they can be 110 mph max .


The document pertains to dual modes per the title but it doesn't change the first statement that says:

"The 125 MPH top speed for PRIIA vehicles is enshrined neither in the PRIIA legislation nor in any FRA regulation; it is a policy decision developed by the NGEC and the FRA in the interests of “standardization” for next generation passenger equipment to be used in the United States, as the 125 MPH top speed is the maximum speed under which vehicles would not fall under the FRA Tier 2 passenger car equipment requirements in the Code of Federal Regulations".

What about that statement says dual modes only? It clearly says "for PRIIA vehicles".

And the NGEC was an Amtrak committee opened in 2010. NGEC does not have regulation-making capability. Also, Leadership today has little regard for the prior leadership's policies, so it's very possible the policy could be tossed or waived.
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Re: Rethinking HEP and LD power

Postby east point » Thu Feb 21, 2019 3:06 pm

Some where read that acceleration and faster top speeds are available with AC traction motors that are somewhat bigger and heavier than present. Anyone know that for a fact?
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Re: Rethinking HEP and LD power

Postby John_Perkowski » Fri Feb 22, 2019 7:26 pm

east point wrote: ... faster top speeds ...


Faster top speeds do not matter if the host railroad only keeps the track at Class 4 or 5. You’re only getting to 80 or 90.
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Re: Rethinking HEP and LD power

Postby east point » Fri Feb 22, 2019 11:15 pm

redacted
Last edited by east point on Fri Feb 22, 2019 11:31 pm, edited 5 times in total.
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Re: Rethinking HEP and LD power

Postby east point » Fri Feb 22, 2019 11:19 pm

John_Perkowski wrote:
east point wrote: ... faster top speeds ...


Faster top speeds do not matter if the host railroad only keeps the track at Class 4 or 5. You’re only getting to 80 or 90.



Thinking more of 110 - 125 MPH Charger capable speeds MAS
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