[T-509] How Locomotives Work: DPU Lesson of the Day

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[@RDC_Autosports]

2007 i was working with UP in FT worth TX and i asked them why every train has a dpu, he said it gives them 8% better fuel economy, control from both ends of the train and less train separations due to draw bar forces on a grades. think of it as a big radio controlled car. down side is in hills with lots of curves you can lose radio signal

[@4everdc302]

A 1to1 Scale DCC system 😊

[@DavidLeon140m3]

The video of the MRL train west of Mullan Pass is 2.2 percent going west.... The manned helpers control the throttle... brakes are controlled by the head end. There is another section of manned helpers is used from Livingston to Bozeman ... same type of operation.

[@kelvintorrence5994]

sounds right too me ,butt then I'm a trucker like you, great video

[@thurmandavide]

Subscribed! You did a great job on describing DPU's! Learned a lot.

[@LourdesReynoso-x7p]

So happy to see you videos 😊😮

[@ocsrc]

I guess I am not the only one who calls it the " Spitter Valve "

[@Rob-tr1st]

I've always known it as a spitter valve since 1986

[@jz1340]

DPUs reduce couple and draw bar stress. DPUs are in wide use so the hookup and test costs are minimal compared to the benefits. As technology increases so will the the use by RRs increase.

[@martindoyle831]

Hey man... Cp rail is the pioneer of DPU opps. And started it and ran continously on coal trains in the 70s. They started this with rebuilt B units to house the radio equipment. The CP roster of sd40-2s was #ed for slave and masters in the 58xx and up .. there is a lot more info on this. Plz update the video.

[@user-mr3ct1dm9p]

If I remember correct, SOUTHERN was also very early to do/,try stuff like this in the late 60's/ early 70's, especially on the line over Saluda Mtn.

[@DavidLeon140m3]

@@martindoyle831 no… Southern Railroad did it from the 60’s . They had radio controlled equipment in converted boxcars

[@keithmoore5306]

out west those are probably the wire connected DPU's instead of the wireless jobs AC!! if you want some info on CSX you might want to get a hold of DJ over on DJ's trains channels he's an engineer for the cheapskate express as the track gang around here refers to CSX!!

[@DavidLeon140m3]

nope... radio controlled

[@kelvintorrence5994]

excvelllence video again sir

[@MarcelosalivaTRENESArg]

Muy buen video Excelente estimado amigo Like 👍🏻 un saludo 👋🏻 😊

[@class77sncb]

they were used after couplings did break !

[@RailfanNetwork]

Howdy AC!!

[@Trains21]

Hey Tony, I swear I just thinking about you. Went to check out your Rumble page. Will be emailing you over the weekend. Take care!

[@RailfanNetwork]

@@Trains21 I've been around! Ran out of ideas for Rumble. Goin back to railfanning. Look forward to hearing from you!!

[@ocsrc]

These incredible long trains cause excess wear on the tracks, especially on curves

[@user-ih1mo8vv7o]

❤❤❤❤❤

[@ChuckLynch-uw5jf]

Come on now, the main advantage of DPUs is that they allow more efficient performance while getting rid of a train crew to man them. Helper sets do everything DPUs can do, but of course they require a crew to man them

[@JimAlderson-cn6ek]

Way to call it how it is automation to put a guy out of a job

[@massmike11]

MU’s however only require one crew for multiple units also. Helper units require a crew because they do not stay with train, they are temporary and let off a after a short push to get the train over the section where more power is temporarily needed. Then they move on to the next train that needs help on that section. Witch means that they are capable of independent operation.

[@eastamericantrains589]

DPU took away a really nice helper job at my yard

[@az8theist977]

Do CN employees NOT wear reflective vests? @13:58

[@JerseyRails104]

Back in the day, no railroads used reflective vest

[@thomasnativo6491]

So does CSX on the Keystone Subdivision at Sand Patch grade for Helper

[@thomasnativo6491]

But why am I seeing DPU on CSX River subdivision just doesn't fun

[@thomasnativo6491]

I like Normal Lash ups in the front

[@7171-Ws6]

It doesn’t take very long to set up a DP 15 min

[@ocsrc]

I am pretty sure that there has to be a human in the main locomotive and a human in the DPU to coordinate and press buttons on the DPU system and the lead locomotive

[@7171-Ws6]

Nope

[@ocsrc]

@@7171-Ws6 someone has to be in each locomotive and set the levers for the manual brakes and the throttle and turn on the breakers and switches. Once it is in DPU mode they can disconnect from the main locomotive or add the DPUs to the Main locomotive, but someone has to go in and turn each locomotive on and flip the breakers and insert the throttle and move the levers. As long as it is left running then it can be remotely controlled but once you turn it off or one of those levers is manually moved , it has to be manually moved again to the DPU state It would be great if you could remotely turn on the breakers and start it up and move a locomotive without anyone being in it. You wouldn't need yard crews to put trains together. Just someone remotely watching a video feed.

[@DavidLeon140m3]

@@ocsrc wrong...

[@mrmax128]

yes; someone has to go to the DPU engine and set it up for DPU mode, and then they go to the lead and set it up for lead. Typically yard hostlers (who move engines around in the yard) set this up

[@dominicdeeble4829]

I probably wouldn’t have said how to setup a DPU. Railfans or the general public doesn’t need to know this information. That’s just my opinion.

[@DLouie21]

Railroaders need to stop acting like working in the industry is like a security clearance at the Pentagon.

[@keithmoore5306]

why do you think some punk might try a rip a pull?

[@ChainsawNW1218]

Enjoyed the video, nice footage and operations of distributed power!🛤🚂

[@richintalent]

Why was there a commuter car (MARC) on the freight at 19:47?

[@pbear6251]

It was being delivered from its manufacturer to the transit agency that owns it

[@keithmoore5306]

a dead haul delivery!!it's tad too big for Fedex!!!

[@pbear6251]

@@keithmoore5306 Ya think??? or to fit in the plane!!

[@keithmoore5306]

@@pbear6251 depends on the plane!

[@pbear6251]

@@keithmoore5306 It's cheaper to put it on the back end of a freight seeing as how most Airports don't have rail access!!🤣🤣