QUOTE: Originally posted by eolafan Iron ore trains seen here at Eola yard on BNSF in Aurora, IL recently will have two up front and one DPU in the rear. These run over the C&I into Eola and tie up for about half an hour or so until the head end crew is run back to the DPU unit and then take the train to Galesburg using the single DPU unit as the control cab. Interesting hey?
QUOTE: Originally posted by spbed Yes I understand about the grades. But, if you watch the Rochelle cam you NEVER see a BNSF coal train with DPUs but some of the UPRRs have them & others do not. The same goes for the tapes I have of the Kearney sub & Gibbons some have & some do not. I thought mabe the DPU is also needed at destination of the loaded coal train maybe the answer. Thanks for the reply [:o)][:D]
QUOTE: Originally posted by spbed OK so what you are saying if I understand correctly since all UPRR coal trains come from the same place shorter coal trains do not needed a DPU but longer coal trains require one is that correct[?][?] Originally posted by oltmannd [ Depends where's they're going, too. The ruling grade anywhere along the route would govern. Also, most unit trains are equipped with high strength draw gear, but much of the older equipment is not and is only good for ~250,000# drawbar pull. So, it could be an equipment issue, too. (not likely with UP Powder River coal) But, in general, it's grade and tonnage that rules. -Don (Random stuff, mostly about trains - what else? http://blerfblog.blogspot.com/) Reply spbed Member sinceDecember 2001 From: Austin TX 4,941 posts Posted by spbed on Friday, April 29, 2005 9:40 AM Thanks that is what I thought that the DPU was the loco used to deliver the coal. Also, thanks for the DPU qualified. [:I][:p] Originally posted by jeffhergert [ Living nearby to MP 186 of the UPRR Austin TX Sub Reply spbed Member sinceDecember 2001 From: Austin TX 4,941 posts Posted by spbed on Friday, April 29, 2005 9:37 AM OK so what you are saying if I understand correctly since all UPRR coal trains come from the same place shorter coal trains do not needed a DPU but longer coal trains require one is that correct[?][?] Originally posted by oltmannd [ Living nearby to MP 186 of the UPRR Austin TX Sub Reply spbed Member sinceDecember 2001 From: Austin TX 4,941 posts Posted by spbed on Friday, April 29, 2005 9:34 AM OK thanks but why do some coal trains have it & others do not? [:o)][:)] Originally posted by tflescher Living nearby to MP 186 of the UPRR Austin TX Sub Reply jeffhergert Member sinceMarch 2003 From: Central Iowa 6,898 posts Posted by jeffhergert on Friday, April 29, 2005 9:26 AM We deliver unit coal trains to a power plant at Marshalltown, Iowa and to the CRANDIC (CIC) at Cedar Rapids, Iowa. They run these trains DPU, one on the front, one on the rear. At Marshalltown, usual practice has been to unlink the DPU system, set the head engine over onto a yard track and have the engineer go to the rear unit and then shove the train into the power plant tracks. At Cedar Rapids, they pull down to the CIC switch, use the head engine to pull in about 30 cars, cut off and run around and back to the train, pull in another cut and go back. Since this yard only has three tracks, the lead engine is placed on the UP main beyond and clear of the CIC switch. The system is unlinked, engineer is taken to the back engine and the remainder of the train is shoved into the interchange track. Cut off, grab the engine on the main and head back for Beverly yard. If you happen to read Railway Age magazine, there was an article about the CIC recently that mentions a new connection between the UP and CIC. It's been talked of for years. They finally built it, two tracks with concrete ties, able to take entire coal or grain trains intact into it with room at either end to take power off and run back thru on the other track. It's been ready to use for a few months now. So far all it's been used for is storing UP trains. The UP and CIC haven't come to agreement about using it. I've heard differing reasons as to why, but all it means is interchanging trains the old fashioned way. Jeff PS Trains may be left in conventional (all power up front) because the train could be going intact/run thru to a foreign line where the crews aren't DPU qualified. Reply oltmannd Member sinceJanuary 2001 From: Atlanta 11,971 posts Posted by oltmannd on Friday, April 29, 2005 9:01 AM It's the train tonnage and the grade. If the tonnage is too high and/or the grade too steep, you will exceed the knuckle strength if you put all the locos up front. The "back of the envelope" calculation is: 20#/trailing ton/%of grade Figure about 400,000# max allowable drawbar pull for a unit coal train. So, if you have a 2% grade and a 10,000 ton train, you're tractive effort needed to get up the hill would be 20 x 10,000 x 2 = 400,000# . Any steeper grade or heavier train would require distributed power. -Don (Random stuff, mostly about trains - what else? http://blerfblog.blogspot.com/) Reply Anonymous Member sinceApril 2003 305,205 posts Posted by Anonymous on Friday, April 29, 2005 8:50 AM I love the DPU concept. At first I was a little intimidated by it. But after running 2 coal trains and one grain train, I got comfortable to it. I make that rear unit earn it's money. Makes for smooth ride over hills, curves and undelations. [tup][tup] Reply Edit spbed Member sinceDecember 2001 From: Austin TX 4,941 posts Posted by spbed on Friday, April 29, 2005 7:42 AM Thanks that is more what I thought it was for use when unloading probably when the plant does not have a loop track. [:D][:p] Originally posted by zardoz [ Living nearby to MP 186 of the UPRR Austin TX Sub Reply tree68 Member sinceDecember 2001 From: Northern New York 25,010 posts Posted by tree68 on Friday, April 29, 2005 7:39 AM Consider, too, that if all the power is on the head end, the weight/stress on the first coupler is the entire train. With DPU, it is some fraction of that. Larry Resident Microferroequinologist (at least at my house) Everyone goes home; Safety begins with you My Opinion. Standard Disclaimers Apply. No Expiration Date Come ride the rails with me! There's one thing about humility - the moment you think you've got it, you've lost it... Reply spbed Member sinceDecember 2001 From: Austin TX 4,941 posts Posted by spbed on Friday, April 29, 2005 7:38 AM Yes I understand about the grades. But, if you watch the Rochelle cam you NEVER see a BNSF coal train with DPUs but some of the UPRRs have them & others do not. The same goes for the tapes I have of the Kearney sub & Gibbons some have & some do not. I thought mabe the DPU is also needed at destination of the loaded coal train maybe the answer. Thanks for the reply [:o)][:D] Originally posted by Mookie Living nearby to MP 186 of the UPRR Austin TX Sub Reply zardoz Member sinceJanuary 2003 From: Kenosha, WI 6,567 posts Posted by zardoz on Friday, April 29, 2005 7:34 AM It may also have to do with the weight (# of cars) of the train, and/or the track arrangement at the loading / unloading site. Reply Mookie Member sinceJune 2001 From: US 13,488 posts Posted by Mookie on Friday, April 29, 2005 6:41 AM OK - fair question - I will take a stab at it, since we use a lot of DPU's here - We have a fairly decent grade going south out of Lincoln. The ones going south usually have DPUs. The ones going east generally keep all their power on the head-end. So must be the grades they are going to encounter in the trip. She who has no signature! cinscocom-tmw Reply spbed Member sinceDecember 2001 From: Austin TX 4,941 posts DPU's Posted by spbed on Friday, April 29, 2005 6:32 AM Why do some coal trains have them & others do not? Living nearby to MP 186 of the UPRR Austin TX Sub Reply Join our Community! Our community is FREE to join. To participate you must either login or register for an account. Login » Register » Search the Community Newsletter Sign-Up By signing up you may also receive occasional reader surveys and special offers from Trains magazine.Please view our privacy policy More great sites from Kalmbach Media Terms Of Use | Privacy Policy | Copyright Policy
Originally posted by oltmannd [
-Don (Random stuff, mostly about trains - what else? http://blerfblog.blogspot.com/)
Originally posted by jeffhergert [ Living nearby to MP 186 of the UPRR Austin TX Sub Reply spbed Member sinceDecember 2001 From: Austin TX 4,941 posts Posted by spbed on Friday, April 29, 2005 9:37 AM OK so what you are saying if I understand correctly since all UPRR coal trains come from the same place shorter coal trains do not needed a DPU but longer coal trains require one is that correct[?][?] Originally posted by oltmannd [ Living nearby to MP 186 of the UPRR Austin TX Sub Reply spbed Member sinceDecember 2001 From: Austin TX 4,941 posts Posted by spbed on Friday, April 29, 2005 9:34 AM OK thanks but why do some coal trains have it & others do not? [:o)][:)] Originally posted by tflescher Living nearby to MP 186 of the UPRR Austin TX Sub Reply jeffhergert Member sinceMarch 2003 From: Central Iowa 6,898 posts Posted by jeffhergert on Friday, April 29, 2005 9:26 AM We deliver unit coal trains to a power plant at Marshalltown, Iowa and to the CRANDIC (CIC) at Cedar Rapids, Iowa. They run these trains DPU, one on the front, one on the rear. At Marshalltown, usual practice has been to unlink the DPU system, set the head engine over onto a yard track and have the engineer go to the rear unit and then shove the train into the power plant tracks. At Cedar Rapids, they pull down to the CIC switch, use the head engine to pull in about 30 cars, cut off and run around and back to the train, pull in another cut and go back. Since this yard only has three tracks, the lead engine is placed on the UP main beyond and clear of the CIC switch. The system is unlinked, engineer is taken to the back engine and the remainder of the train is shoved into the interchange track. Cut off, grab the engine on the main and head back for Beverly yard. If you happen to read Railway Age magazine, there was an article about the CIC recently that mentions a new connection between the UP and CIC. It's been talked of for years. They finally built it, two tracks with concrete ties, able to take entire coal or grain trains intact into it with room at either end to take power off and run back thru on the other track. It's been ready to use for a few months now. So far all it's been used for is storing UP trains. The UP and CIC haven't come to agreement about using it. I've heard differing reasons as to why, but all it means is interchanging trains the old fashioned way. Jeff PS Trains may be left in conventional (all power up front) because the train could be going intact/run thru to a foreign line where the crews aren't DPU qualified. Reply oltmannd Member sinceJanuary 2001 From: Atlanta 11,971 posts Posted by oltmannd on Friday, April 29, 2005 9:01 AM It's the train tonnage and the grade. If the tonnage is too high and/or the grade too steep, you will exceed the knuckle strength if you put all the locos up front. The "back of the envelope" calculation is: 20#/trailing ton/%of grade Figure about 400,000# max allowable drawbar pull for a unit coal train. So, if you have a 2% grade and a 10,000 ton train, you're tractive effort needed to get up the hill would be 20 x 10,000 x 2 = 400,000# . Any steeper grade or heavier train would require distributed power. -Don (Random stuff, mostly about trains - what else? http://blerfblog.blogspot.com/) Reply Anonymous Member sinceApril 2003 305,205 posts Posted by Anonymous on Friday, April 29, 2005 8:50 AM I love the DPU concept. At first I was a little intimidated by it. But after running 2 coal trains and one grain train, I got comfortable to it. I make that rear unit earn it's money. Makes for smooth ride over hills, curves and undelations. [tup][tup] Reply Edit spbed Member sinceDecember 2001 From: Austin TX 4,941 posts Posted by spbed on Friday, April 29, 2005 7:42 AM Thanks that is more what I thought it was for use when unloading probably when the plant does not have a loop track. [:D][:p] Originally posted by zardoz [ Living nearby to MP 186 of the UPRR Austin TX Sub Reply tree68 Member sinceDecember 2001 From: Northern New York 25,010 posts Posted by tree68 on Friday, April 29, 2005 7:39 AM Consider, too, that if all the power is on the head end, the weight/stress on the first coupler is the entire train. With DPU, it is some fraction of that. Larry Resident Microferroequinologist (at least at my house) Everyone goes home; Safety begins with you My Opinion. Standard Disclaimers Apply. No Expiration Date Come ride the rails with me! There's one thing about humility - the moment you think you've got it, you've lost it... Reply spbed Member sinceDecember 2001 From: Austin TX 4,941 posts Posted by spbed on Friday, April 29, 2005 7:38 AM Yes I understand about the grades. But, if you watch the Rochelle cam you NEVER see a BNSF coal train with DPUs but some of the UPRRs have them & others do not. The same goes for the tapes I have of the Kearney sub & Gibbons some have & some do not. I thought mabe the DPU is also needed at destination of the loaded coal train maybe the answer. Thanks for the reply [:o)][:D] Originally posted by Mookie Living nearby to MP 186 of the UPRR Austin TX Sub Reply zardoz Member sinceJanuary 2003 From: Kenosha, WI 6,567 posts Posted by zardoz on Friday, April 29, 2005 7:34 AM It may also have to do with the weight (# of cars) of the train, and/or the track arrangement at the loading / unloading site. Reply Mookie Member sinceJune 2001 From: US 13,488 posts Posted by Mookie on Friday, April 29, 2005 6:41 AM OK - fair question - I will take a stab at it, since we use a lot of DPU's here - We have a fairly decent grade going south out of Lincoln. The ones going south usually have DPUs. The ones going east generally keep all their power on the head-end. So must be the grades they are going to encounter in the trip. She who has no signature! cinscocom-tmw Reply spbed Member sinceDecember 2001 From: Austin TX 4,941 posts DPU's Posted by spbed on Friday, April 29, 2005 6:32 AM Why do some coal trains have them & others do not? Living nearby to MP 186 of the UPRR Austin TX Sub Reply Join our Community! Our community is FREE to join. To participate you must either login or register for an account. Login » Register » Search the Community Newsletter Sign-Up By signing up you may also receive occasional reader surveys and special offers from Trains magazine.Please view our privacy policy More great sites from Kalmbach Media Terms Of Use | Privacy Policy | Copyright Policy
Living nearby to MP 186 of the UPRR Austin TX Sub
Originally posted by oltmannd [ Living nearby to MP 186 of the UPRR Austin TX Sub Reply spbed Member sinceDecember 2001 From: Austin TX 4,941 posts Posted by spbed on Friday, April 29, 2005 9:34 AM OK thanks but why do some coal trains have it & others do not? [:o)][:)] Originally posted by tflescher Living nearby to MP 186 of the UPRR Austin TX Sub Reply jeffhergert Member sinceMarch 2003 From: Central Iowa 6,898 posts Posted by jeffhergert on Friday, April 29, 2005 9:26 AM We deliver unit coal trains to a power plant at Marshalltown, Iowa and to the CRANDIC (CIC) at Cedar Rapids, Iowa. They run these trains DPU, one on the front, one on the rear. At Marshalltown, usual practice has been to unlink the DPU system, set the head engine over onto a yard track and have the engineer go to the rear unit and then shove the train into the power plant tracks. At Cedar Rapids, they pull down to the CIC switch, use the head engine to pull in about 30 cars, cut off and run around and back to the train, pull in another cut and go back. Since this yard only has three tracks, the lead engine is placed on the UP main beyond and clear of the CIC switch. The system is unlinked, engineer is taken to the back engine and the remainder of the train is shoved into the interchange track. Cut off, grab the engine on the main and head back for Beverly yard. If you happen to read Railway Age magazine, there was an article about the CIC recently that mentions a new connection between the UP and CIC. It's been talked of for years. They finally built it, two tracks with concrete ties, able to take entire coal or grain trains intact into it with room at either end to take power off and run back thru on the other track. It's been ready to use for a few months now. So far all it's been used for is storing UP trains. The UP and CIC haven't come to agreement about using it. I've heard differing reasons as to why, but all it means is interchanging trains the old fashioned way. Jeff PS Trains may be left in conventional (all power up front) because the train could be going intact/run thru to a foreign line where the crews aren't DPU qualified. Reply oltmannd Member sinceJanuary 2001 From: Atlanta 11,971 posts Posted by oltmannd on Friday, April 29, 2005 9:01 AM It's the train tonnage and the grade. If the tonnage is too high and/or the grade too steep, you will exceed the knuckle strength if you put all the locos up front. The "back of the envelope" calculation is: 20#/trailing ton/%of grade Figure about 400,000# max allowable drawbar pull for a unit coal train. So, if you have a 2% grade and a 10,000 ton train, you're tractive effort needed to get up the hill would be 20 x 10,000 x 2 = 400,000# . Any steeper grade or heavier train would require distributed power. -Don (Random stuff, mostly about trains - what else? http://blerfblog.blogspot.com/) Reply Anonymous Member sinceApril 2003 305,205 posts Posted by Anonymous on Friday, April 29, 2005 8:50 AM I love the DPU concept. At first I was a little intimidated by it. But after running 2 coal trains and one grain train, I got comfortable to it. I make that rear unit earn it's money. Makes for smooth ride over hills, curves and undelations. [tup][tup] Reply Edit spbed Member sinceDecember 2001 From: Austin TX 4,941 posts Posted by spbed on Friday, April 29, 2005 7:42 AM Thanks that is more what I thought it was for use when unloading probably when the plant does not have a loop track. [:D][:p] Originally posted by zardoz [ Living nearby to MP 186 of the UPRR Austin TX Sub Reply tree68 Member sinceDecember 2001 From: Northern New York 25,010 posts Posted by tree68 on Friday, April 29, 2005 7:39 AM Consider, too, that if all the power is on the head end, the weight/stress on the first coupler is the entire train. With DPU, it is some fraction of that. Larry Resident Microferroequinologist (at least at my house) Everyone goes home; Safety begins with you My Opinion. Standard Disclaimers Apply. No Expiration Date Come ride the rails with me! There's one thing about humility - the moment you think you've got it, you've lost it... Reply spbed Member sinceDecember 2001 From: Austin TX 4,941 posts Posted by spbed on Friday, April 29, 2005 7:38 AM Yes I understand about the grades. But, if you watch the Rochelle cam you NEVER see a BNSF coal train with DPUs but some of the UPRRs have them & others do not. The same goes for the tapes I have of the Kearney sub & Gibbons some have & some do not. I thought mabe the DPU is also needed at destination of the loaded coal train maybe the answer. Thanks for the reply [:o)][:D] Originally posted by Mookie Living nearby to MP 186 of the UPRR Austin TX Sub Reply zardoz Member sinceJanuary 2003 From: Kenosha, WI 6,567 posts Posted by zardoz on Friday, April 29, 2005 7:34 AM It may also have to do with the weight (# of cars) of the train, and/or the track arrangement at the loading / unloading site. Reply Mookie Member sinceJune 2001 From: US 13,488 posts Posted by Mookie on Friday, April 29, 2005 6:41 AM OK - fair question - I will take a stab at it, since we use a lot of DPU's here - We have a fairly decent grade going south out of Lincoln. The ones going south usually have DPUs. The ones going east generally keep all their power on the head-end. So must be the grades they are going to encounter in the trip. She who has no signature! cinscocom-tmw Reply spbed Member sinceDecember 2001 From: Austin TX 4,941 posts DPU's Posted by spbed on Friday, April 29, 2005 6:32 AM Why do some coal trains have them & others do not? Living nearby to MP 186 of the UPRR Austin TX Sub Reply Join our Community! Our community is FREE to join. To participate you must either login or register for an account. Login » Register » Search the Community Newsletter Sign-Up By signing up you may also receive occasional reader surveys and special offers from Trains magazine.Please view our privacy policy More great sites from Kalmbach Media Terms Of Use | Privacy Policy | Copyright Policy
Originally posted by tflescher Living nearby to MP 186 of the UPRR Austin TX Sub Reply jeffhergert Member sinceMarch 2003 From: Central Iowa 6,898 posts Posted by jeffhergert on Friday, April 29, 2005 9:26 AM We deliver unit coal trains to a power plant at Marshalltown, Iowa and to the CRANDIC (CIC) at Cedar Rapids, Iowa. They run these trains DPU, one on the front, one on the rear. At Marshalltown, usual practice has been to unlink the DPU system, set the head engine over onto a yard track and have the engineer go to the rear unit and then shove the train into the power plant tracks. At Cedar Rapids, they pull down to the CIC switch, use the head engine to pull in about 30 cars, cut off and run around and back to the train, pull in another cut and go back. Since this yard only has three tracks, the lead engine is placed on the UP main beyond and clear of the CIC switch. The system is unlinked, engineer is taken to the back engine and the remainder of the train is shoved into the interchange track. Cut off, grab the engine on the main and head back for Beverly yard. If you happen to read Railway Age magazine, there was an article about the CIC recently that mentions a new connection between the UP and CIC. It's been talked of for years. They finally built it, two tracks with concrete ties, able to take entire coal or grain trains intact into it with room at either end to take power off and run back thru on the other track. It's been ready to use for a few months now. So far all it's been used for is storing UP trains. The UP and CIC haven't come to agreement about using it. I've heard differing reasons as to why, but all it means is interchanging trains the old fashioned way. Jeff PS Trains may be left in conventional (all power up front) because the train could be going intact/run thru to a foreign line where the crews aren't DPU qualified. Reply oltmannd Member sinceJanuary 2001 From: Atlanta 11,971 posts Posted by oltmannd on Friday, April 29, 2005 9:01 AM It's the train tonnage and the grade. If the tonnage is too high and/or the grade too steep, you will exceed the knuckle strength if you put all the locos up front. The "back of the envelope" calculation is: 20#/trailing ton/%of grade Figure about 400,000# max allowable drawbar pull for a unit coal train. So, if you have a 2% grade and a 10,000 ton train, you're tractive effort needed to get up the hill would be 20 x 10,000 x 2 = 400,000# . Any steeper grade or heavier train would require distributed power. -Don (Random stuff, mostly about trains - what else? http://blerfblog.blogspot.com/) Reply Anonymous Member sinceApril 2003 305,205 posts Posted by Anonymous on Friday, April 29, 2005 8:50 AM I love the DPU concept. At first I was a little intimidated by it. But after running 2 coal trains and one grain train, I got comfortable to it. I make that rear unit earn it's money. Makes for smooth ride over hills, curves and undelations. [tup][tup] Reply Edit spbed Member sinceDecember 2001 From: Austin TX 4,941 posts Posted by spbed on Friday, April 29, 2005 7:42 AM Thanks that is more what I thought it was for use when unloading probably when the plant does not have a loop track. [:D][:p] Originally posted by zardoz [ Living nearby to MP 186 of the UPRR Austin TX Sub Reply tree68 Member sinceDecember 2001 From: Northern New York 25,010 posts Posted by tree68 on Friday, April 29, 2005 7:39 AM Consider, too, that if all the power is on the head end, the weight/stress on the first coupler is the entire train. With DPU, it is some fraction of that. Larry Resident Microferroequinologist (at least at my house) Everyone goes home; Safety begins with you My Opinion. Standard Disclaimers Apply. No Expiration Date Come ride the rails with me! There's one thing about humility - the moment you think you've got it, you've lost it... Reply spbed Member sinceDecember 2001 From: Austin TX 4,941 posts Posted by spbed on Friday, April 29, 2005 7:38 AM Yes I understand about the grades. But, if you watch the Rochelle cam you NEVER see a BNSF coal train with DPUs but some of the UPRRs have them & others do not. The same goes for the tapes I have of the Kearney sub & Gibbons some have & some do not. I thought mabe the DPU is also needed at destination of the loaded coal train maybe the answer. Thanks for the reply [:o)][:D] Originally posted by Mookie Living nearby to MP 186 of the UPRR Austin TX Sub Reply zardoz Member sinceJanuary 2003 From: Kenosha, WI 6,567 posts Posted by zardoz on Friday, April 29, 2005 7:34 AM It may also have to do with the weight (# of cars) of the train, and/or the track arrangement at the loading / unloading site. Reply Mookie Member sinceJune 2001 From: US 13,488 posts Posted by Mookie on Friday, April 29, 2005 6:41 AM OK - fair question - I will take a stab at it, since we use a lot of DPU's here - We have a fairly decent grade going south out of Lincoln. The ones going south usually have DPUs. The ones going east generally keep all their power on the head-end. So must be the grades they are going to encounter in the trip. She who has no signature! cinscocom-tmw Reply spbed Member sinceDecember 2001 From: Austin TX 4,941 posts DPU's Posted by spbed on Friday, April 29, 2005 6:32 AM Why do some coal trains have them & others do not? Living nearby to MP 186 of the UPRR Austin TX Sub Reply Join our Community! Our community is FREE to join. To participate you must either login or register for an account. Login » Register » Search the Community Newsletter Sign-Up By signing up you may also receive occasional reader surveys and special offers from Trains magazine.Please view our privacy policy More great sites from Kalmbach Media Terms Of Use | Privacy Policy | Copyright Policy
Originally posted by zardoz [ Living nearby to MP 186 of the UPRR Austin TX Sub Reply tree68 Member sinceDecember 2001 From: Northern New York 25,010 posts Posted by tree68 on Friday, April 29, 2005 7:39 AM Consider, too, that if all the power is on the head end, the weight/stress on the first coupler is the entire train. With DPU, it is some fraction of that. Larry Resident Microferroequinologist (at least at my house) Everyone goes home; Safety begins with you My Opinion. Standard Disclaimers Apply. No Expiration Date Come ride the rails with me! There's one thing about humility - the moment you think you've got it, you've lost it... Reply spbed Member sinceDecember 2001 From: Austin TX 4,941 posts Posted by spbed on Friday, April 29, 2005 7:38 AM Yes I understand about the grades. But, if you watch the Rochelle cam you NEVER see a BNSF coal train with DPUs but some of the UPRRs have them & others do not. The same goes for the tapes I have of the Kearney sub & Gibbons some have & some do not. I thought mabe the DPU is also needed at destination of the loaded coal train maybe the answer. Thanks for the reply [:o)][:D] Originally posted by Mookie Living nearby to MP 186 of the UPRR Austin TX Sub Reply zardoz Member sinceJanuary 2003 From: Kenosha, WI 6,567 posts Posted by zardoz on Friday, April 29, 2005 7:34 AM It may also have to do with the weight (# of cars) of the train, and/or the track arrangement at the loading / unloading site. Reply Mookie Member sinceJune 2001 From: US 13,488 posts Posted by Mookie on Friday, April 29, 2005 6:41 AM OK - fair question - I will take a stab at it, since we use a lot of DPU's here - We have a fairly decent grade going south out of Lincoln. The ones going south usually have DPUs. The ones going east generally keep all their power on the head-end. So must be the grades they are going to encounter in the trip. She who has no signature! cinscocom-tmw Reply spbed Member sinceDecember 2001 From: Austin TX 4,941 posts DPU's Posted by spbed on Friday, April 29, 2005 6:32 AM Why do some coal trains have them & others do not? Living nearby to MP 186 of the UPRR Austin TX Sub Reply Join our Community! Our community is FREE to join. To participate you must either login or register for an account. Login » Register » Search the Community Newsletter Sign-Up By signing up you may also receive occasional reader surveys and special offers from Trains magazine.Please view our privacy policy More great sites from Kalmbach Media Terms Of Use | Privacy Policy | Copyright Policy
Larry Resident Microferroequinologist (at least at my house) Everyone goes home; Safety begins with you My Opinion. Standard Disclaimers Apply. No Expiration Date Come ride the rails with me! There's one thing about humility - the moment you think you've got it, you've lost it...
Originally posted by Mookie Living nearby to MP 186 of the UPRR Austin TX Sub Reply zardoz Member sinceJanuary 2003 From: Kenosha, WI 6,567 posts Posted by zardoz on Friday, April 29, 2005 7:34 AM It may also have to do with the weight (# of cars) of the train, and/or the track arrangement at the loading / unloading site. Reply Mookie Member sinceJune 2001 From: US 13,488 posts Posted by Mookie on Friday, April 29, 2005 6:41 AM OK - fair question - I will take a stab at it, since we use a lot of DPU's here - We have a fairly decent grade going south out of Lincoln. The ones going south usually have DPUs. The ones going east generally keep all their power on the head-end. So must be the grades they are going to encounter in the trip. She who has no signature! cinscocom-tmw Reply spbed Member sinceDecember 2001 From: Austin TX 4,941 posts DPU's Posted by spbed on Friday, April 29, 2005 6:32 AM Why do some coal trains have them & others do not? Living nearby to MP 186 of the UPRR Austin TX Sub Reply Join our Community! Our community is FREE to join. To participate you must either login or register for an account. Login » Register » Search the Community Newsletter Sign-Up By signing up you may also receive occasional reader surveys and special offers from Trains magazine.Please view our privacy policy More great sites from Kalmbach Media Terms Of Use | Privacy Policy | Copyright Policy
She who has no signature! cinscocom-tmw
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