8-car Bomb Consist

Discussion relating to the operations of MTA MetroNorth Railroad including west of Hudson operations and discussion of CtDOT sponsored rail operations such as Shore Line East and the Springfield to New Haven Hartford Line

Moderators: GirlOnTheTrain, nomis, Jeff Smith, FL9AC

District D RTC
Posts: 239
Joined: Mon Mar 22, 2004 1:58 pm

8-car Bomb Consist

Post by District D RTC » Fri Feb 18, 2011 12:29 am

I can't seem to locate the post to add this reply to an existing thread so here we go:

Today while out to catch AMTK#49(17) with the NJT Comet-1Bs on the rear (again) I observed an 8 car train. I know in the past this has been a rare occasion. I'm told that this is currently being done with TWO trainsets to provide additional capacity on the NHV side where those two sets are runing during the rush on one of the 'combined' trains.

Anyway, here's the video showing the 8-car train:
http://www.youtube.com/watch?v=xCgNXB8rejQ


Truth be told I didn't even notice it myself when I was filming the video --- rather it was brought to my attention by Mr. G of Beacon.

--JSW

truck6018
Posts: 966
Joined: Sat Jul 26, 2008 1:31 pm

Re: 8-car Bomb Consist

Post by truck6018 » Fri Feb 18, 2011 8:44 am

One day earlier this week I was on a Hudson Line train from Poughkeepise to GCT that was an 8 car train.

checkthedoorlight
Posts: 1254
Joined: Fri Aug 19, 2005 11:11 am

Re: 8-car Bomb Consist

Post by checkthedoorlight » Sat Feb 19, 2011 10:04 am

Typically when I see an 8 car bomb set, the first and second cars are both cab-cars, the second likely one that crapped out.

I heard that they were breaking up the sets and making some 5 car sets as leftovers. They're turning into NJT!

Clean Cab
Posts: 2893
Joined: Tue Oct 25, 2005 4:18 pm
Location: South Dennis Massachusetts

Re: 8-car Bomb Consist

Post by Clean Cab » Sat Feb 19, 2011 10:08 am

An 8 car Bomb train really puts a strain on the P32AC-DM's (AKA 'Gennies"). 8 cars draws almost 1000 horsepower from the 3200 HP engine, leaving about 1/3 for traction power. This is the drawback to locomotives that use a single motive force for both traction and HEP.
I'm stuck on a sandbar on Cape Cod, and I couldn't be happier!!!

checkthedoorlight
Posts: 1254
Joined: Fri Aug 19, 2005 11:11 am

Re: 8-car Bomb Consist

Post by checkthedoorlight » Sat Feb 19, 2011 10:24 am

Yet Amtrak's single P32 can handle the 9 car LSL on its own?

DutchRailnut
Posts: 22250
Joined: Thu Mar 11, 2004 8:02 pm
Location: released from Stalag 13

Re: 8-car Bomb Consist

Post by DutchRailnut » Sat Feb 19, 2011 10:33 am

Yes but they do not stop and go every 3 miles and do not open up a entire side of doors which will cause big draw due to heat and AC, specially on centerdoors.
Kepping a train going does not require much HP, but HEP and stop and go does.
a 8 car Bombardier draws about 100 hp per car for HEP, leaving 2400 hp for traction on a locomotive geared for 110 mph.
compare that to single FL-9 at 1850 hp being geared for 73 mph (gearing not speed) and you see difference narrow to point of a Genny and 8 cars equals one FL-9 and 8 cars.
was it do able for Amtrak, sure, but not do able for commuter service.
If Conductors are in charge, why are they promoted to be Engineer???

Retired Triebfahrzeugführer. I am not a moderator.

Clean Cab
Posts: 2893
Joined: Tue Oct 25, 2005 4:18 pm
Location: South Dennis Massachusetts

Re: 8-car Bomb Consist

Post by Clean Cab » Sat Feb 19, 2011 11:40 am

I remember many years ago seeing Amtrak 49 on the Hudson Line with 1 FL-9 pulling 10 cars.
I'm stuck on a sandbar on Cape Cod, and I couldn't be happier!!!

User avatar
Tommy Meehan
Posts: 3345
Joined: Tue May 11, 2004 7:00 am
Location: Yonkers

Re: 8-car Bomb Consist

Post by Tommy Meehan » Sat Feb 19, 2011 11:55 am

Clean Cab wrote:An 8 car Bomb train really puts a strain on the P32AC-DM's.
Bring back the P motors and the power change at Harmon. (It only took four minutes.) :)

DutchRailnut
Posts: 22250
Joined: Thu Mar 11, 2004 8:02 pm
Location: released from Stalag 13

Re: 8-car Bomb Consist

Post by DutchRailnut » Sat Feb 19, 2011 12:04 pm

not with todays blue light protection and HEP and 27point jumpers.
more like 30 to 35 minutes.
If Conductors are in charge, why are they promoted to be Engineer???

Retired Triebfahrzeugführer. I am not a moderator.

metrony
Posts: 269
Joined: Sun Feb 05, 2006 11:03 pm

Re: 8-car Bomb Consist

Post by metrony » Sun Feb 20, 2011 9:36 am

Just this past week someone caught an 8 car bomb at Breakneck Ridge. What was the reason for another shoreliner?

http://www.youtube.com/watch?v=v67VPcF1e9c

DutchRailnut
Posts: 22250
Joined: Thu Mar 11, 2004 8:02 pm
Location: released from Stalag 13

Re: 8-car Bomb Consist

Post by DutchRailnut » Sun Feb 20, 2011 5:21 pm

reason is posted in first post
If Conductors are in charge, why are they promoted to be Engineer???

Retired Triebfahrzeugführer. I am not a moderator.

UpperHarlemLine4ever
Posts: 429
Joined: Fri Mar 12, 2004 10:29 am
Location: N White Plains, NY

Re: 8-car Bomb Consist

Post by UpperHarlemLine4ever » Tue Feb 22, 2011 8:56 am

Yes, those old P motors were great units. After a pair of RS-3's would bring a 12 to 15 car train down from either Chatham or Albany, it would be turned over to a single P motor at either NWP or Harmon for the trip to GCT. I can well remember being at Woodlawn, Fordham or University Heights and seeing a train fly through being hauled by a P motorand it was much larger than 7 cars. Since they don't want to do an engine change, with all the technological know how of today why can't they build a dual mode locomotive that can handle 10 or 12 cars?

Ridgefielder
Posts: 2683
Joined: Sat Aug 02, 2008 7:22 pm
Location: Harlem Division MP 15

Re: 8-car Bomb Consist

Post by Ridgefielder » Tue Feb 22, 2011 12:24 pm

UpperHarlemLine4ever wrote:Yes, those old P motors were great units. After a pair of RS-3's would bring a 12 to 15 car train down from either Chatham or Albany, it would be turned over to a single P motor at either NWP or Harmon for the trip to GCT. I can well remember being at Woodlawn, Fordham or University Heights and seeing a train fly through being hauled by a P motorand it was much larger than 7 cars. Since they don't want to do an engine change, with all the technological know how of today why can't they build a dual mode locomotive that can handle 10 or 12 cars?
My off-the-cuff guess would be weight constraints on the Park Ave. viaduct. That, and there doesn't really seem to be a need for one under normal operating conditions.

metrony
Posts: 269
Joined: Sun Feb 05, 2006 11:03 pm

Re: 8-car Bomb Consist

Post by metrony » Tue Feb 22, 2011 9:19 pm

Plus all the platforms north of Harmon are 6 cars. Once in a while the Hudson Line trains can get really crowded and maybe an 8th car would help, but for the most part 7 cars is good enough.

User avatar
Tommy Meehan
Posts: 3345
Joined: Tue May 11, 2004 7:00 am
Location: Yonkers

Re: 8-car Bomb Consist

Post by Tommy Meehan » Tue Feb 22, 2011 10:30 pm

My off-the-cuff guess would be weight constraints on the Park Ave. viaduct.
The weight restrictions of old were based on axle loadings. Supposedly that was why the FL9s were designed with a three-axle rear truck, spread the weight. I think Metro-North has possibly increased the axle ratings on the Park Ave. viaduct.

A bridge or viaduct has to have a lot of capacity. Each section has to be able to handle a heavy train on each track simultaneously plus a margin of safety.

They raised the speed limit on the Park Avenue viaduct from what it once was, that's for sure.

Return to “MTA Metro-North Railroad and CtDOT Passenger Rail”