EMD to build North American passenger locomotives once again

Discussion of Electro-Motive locomotive products and technology, past and present. Official web site can be found here: http://www.emdiesels.com/.

Moderator: GOLDEN-ARM

Re: EMD to build North American passenger locomotives once a

Postby mtuandrew » Sun Sep 03, 2017 12:15 am

NorthWest wrote:Since the passenger operators are fine with urea after treatment, they could still use the 710. Just don't expect it to get over 110 MPH or so.

Why's that? Seems like an F70PACe could reasonably cruise at 125 with a 4400hp 16-710 and separate HEP.

Dutch: oh. Never mind then :P
User avatar
mtuandrew
 
Posts: 4000
Joined: Tue Feb 20, 2007 2:59 am
Location: the Manassas Gap Independent Line

Re: EMD to build North American passenger locomotives once a

Postby NorthWest » Sun Sep 03, 2017 12:33 am

Weight. That's largely why they've gone with high speed diesels in the latest generations of motive power.
User avatar
NorthWest
 
Posts: 376
Joined: Tue Jul 15, 2014 1:54 pm

Re: EMD to build North American passenger locomotives once a

Postby mtuandrew » Sun Sep 03, 2017 2:00 pm

NorthWest wrote:Weight. That's largely why they've gone with high speed diesels in the latest generations of motive power.

Thanks. I realized it was kind of a dumb question after I posted it, akin to "why are most new cars built with 2.0L four-cylinder engines (or the equivalent) instead of 360ci V-8s?"
User avatar
mtuandrew
 
Posts: 4000
Joined: Tue Feb 20, 2007 2:59 am
Location: the Manassas Gap Independent Line

Re: EMD to build North American passenger locomotives once a

Postby Allen Hazen » Sun Sep 03, 2017 11:59 pm

At the risk of sounding like a broken record…
Weight is a problem, and many recent U.S. passenger locomotives have been very heavy for 4-axle locomotives. But there are two distinct issues to consider. Reducing over-all weight probably makes things a bit more energy-efficient (less mass to accelerate), but for safe operation at high speeds without damaging the track with "hammer blow," weight per-axle is, I would guess, just as important. So, given that American railroad operators seem to be very cautious and conservative when it comes to choosing engines, and given that they like the tried-and-true, comparatively low-maintenance, but heavy, engine designs from EMD and GE… WHY HAVEN'T WE SEEN A REVIVAL OF THE A1A TRUCK FOR PASSENGER POWER?
Allen Hazen
 
Posts: 2331
Joined: Fri Mar 12, 2004 10:14 pm
Location: Edmonton, Canada (formerly Melbourne, Australia)

Previous

Return to EMD - Electro-Motive

Who is online

Users browsing this forum: No registered users and 2 guests