DD40X

[Anonymous]

You would think Union Pacific had learned from the Big Boy failure, "Bigger is not better". I am surprised the SD90mac's are not seeing some of these problems.
TIM A

[Anonymous]

You would think Union Pacific had learned from the Big Boy failure, "Bigger is not better". I am surprised the SD90mac's are not seeing some of these problems.
TIM A

[Anonymous]

How smaller are SD90Macs compared to DD40-s?

[Anonymous]

How smaller are SD90Macs compared to DD40-s?

[mudchicken]

About 18 feet shorter, two fewer axles and 58 tons lighter.

Mudchicken

[mudchicken]

About 18 feet shorter, two fewer axles and 58 tons lighter.

Mudchicken

[wcaudle]

These bad boys used to rumble past my house as the were entering and leaving the Hinkle yard in Eastern Oregon. They would hit a certain speed and the house would shake. BUT!!! what an awesome sight they were, especially running through the Blue Mountains. There would be 2 on the front and possibly 1 in the middle, with 3 or 4 SD40-2's on the rear. Uncle Pete has always had the thirst for big trains and heavy HP>

[wcaudle]

These bad boys used to rumble past my house as the were entering and leaving the Hinkle yard in Eastern Oregon. They would hit a certain speed and the house would shake. BUT!!! what an awesome sight they were, especially running through the Blue Mountains. There would be 2 on the front and possibly 1 in the middle, with 3 or 4 SD40-2's on the rear. Uncle Pete has always had the thirst for big trains and heavy HP>

[mudchicken]

QUOTE: Originally posted by Mookie

QUOTE: Originally posted by mudchicken

Feather Duster - bet this would be really interesting if I had a clue what you just said!

Moo

[:D] Welcome to a mudchicken's world Ms. Mookie!

radius? - we don't need no stinkin' radius to railroad here!

Chord definition rules! The highway guyz can keep that darned arc definition!

Frog numbering is nothing more than a unit triangle, a way of determining the frog angle/deflection angle. (Ignore the hypoteneuse, the short side =1 and the long side = the frog size number)

I'll quit while I'm ahead. It was fun watching a cat's eyes glaze over though!

Close your books. Open mind! Pop quiz!

Dirty Bird[^]

[mudchicken]

QUOTE: Originally posted by Mookie

QUOTE: Originally posted by mudchicken

Feather Duster - bet this would be really interesting if I had a clue what you just said!

Moo

[:D] Welcome to a mudchicken's world Ms. Mookie!

radius? - we don't need no stinkin' radius to railroad here!

Chord definition rules! The highway guyz can keep that darned arc definition!

Frog numbering is nothing more than a unit triangle, a way of determining the frog angle/deflection angle. (Ignore the hypoteneuse, the short side =1 and the long side = the frog size number)

I'll quit while I'm ahead. It was fun watching a cat's eyes glaze over though!

Close your books. Open mind! Pop quiz!

Dirty Bird[^]

[Mookie]

QUOTE: Originally posted by mudchicken

QUOTE: Originally posted by Mookie

QUOTE: Originally posted by mudchicken

Feather Duster - bet this would be really interesting if I had a clue what you just said!

Moo

[:D] Welcome to a mudchicken's world Ms. Mookie!

radius? - we don't need no stinkin' radius to railroad here!

Chord definition rules! The highway guyz can keep that darned arc definition!

Frog numbering is nothing more than a unit triangle, a way of determining the frog angle/deflection angle. (Ignore the hypoteneuse, the short side =1 and the long side = the frog size number)

I'll quit while I'm ahead. It was fun watching a cat's eyes glaze over though!

Close your books. Open mind! Pop quiz!

Dirty Bird[^]

You know, birds are very tasty. They taste like chicken! And you can use the feather ends to pick your teef!

[}:)] Moozie

[Mookie]

QUOTE: Originally posted by mudchicken

QUOTE: Originally posted by Mookie

QUOTE: Originally posted by mudchicken

Feather Duster - bet this would be really interesting if I had a clue what you just said!

Moo

[:D] Welcome to a mudchicken's world Ms. Mookie!

radius? - we don't need no stinkin' radius to railroad here!

Chord definition rules! The highway guyz can keep that darned arc definition!

Frog numbering is nothing more than a unit triangle, a way of determining the frog angle/deflection angle. (Ignore the hypoteneuse, the short side =1 and the long side = the frog size number)

I'll quit while I'm ahead. It was fun watching a cat's eyes glaze over though!

Close your books. Open mind! Pop quiz!

Dirty Bird[^]

You know, birds are very tasty. They taste like chicken! And you can use the feather ends to pick your teef!

[}:)] Moozie

[mudchicken]

Pop quiz maybe not so good an option about now? Save the claws and teef for some smaller critter (sans beak & talons) that deserves the rath of mookie. I'd like to get thru Nebraska undamaged next week!

MC

[mudchicken]

Pop quiz maybe not so good an option about now? Save the claws and teef for some smaller critter (sans beak & talons) that deserves the rath of mookie. I'd like to get thru Nebraska undamaged next week!

MC

[Anonymous]

QUOTE: Originally posted by tree68

Many of the long-wheelbase steam locos had "blind drivers" - drivers with no flanges, specifically for that reason.

Yes, SOME did have blind drivers in the middle. But certainly not all long wheelbase locomotives had blind drivers. And they were in the MIDDLE, which means that the rigid wheelbase is still 20 feet or more for a ten coupled. If you look at the Duplex Drives that PRR and B&O had the wheelbase is huge. They look like articulated locomotives but were not. If the D truck is so much trouble how in the world did the Pennsy ever get a Q2 through a switch? The Q2 and T1 did not have blind drivers.

[Anonymous]

QUOTE: Originally posted by tree68

Many of the long-wheelbase steam locos had "blind drivers" - drivers with no flanges, specifically for that reason.

Yes, SOME did have blind drivers in the middle. But certainly not all long wheelbase locomotives had blind drivers. And they were in the MIDDLE, which means that the rigid wheelbase is still 20 feet or more for a ten coupled. If you look at the Duplex Drives that PRR and B&O had the wheelbase is huge. They look like articulated locomotives but were not. If the D truck is so much trouble how in the world did the Pennsy ever get a Q2 through a switch? The Q2 and T1 did not have blind drivers.

[CSSHEGEWISCH]

Center of gravity is higher on steam locomotives. Also some long wheelbase steam locomotives had lateral motion devices on some of the drivers.

[CSSHEGEWISCH]

Center of gravity is higher on steam locomotives. Also some long wheelbase steam locomotives had lateral motion devices on some of the drivers.

[dehusman]

A DD40x will make it around the dumper loop of a coal plant (won't fit through the rotary dumper, too tall and wide up high) and makes it through #10 crossovers just fine. Done both.

[dehusman]

A DD40x will make it around the dumper loop of a coal plant (won't fit through the rotary dumper, too tall and wide up high) and makes it through #10 crossovers just fine. Done both.

[Anonymous]

QUOTE: Originally posted by TARGUBRIGHT

You would think Union Pacific had learned from the Big Boy failure, "Bigger is not better". I am surprised the SD90mac's are not seeing some of these problems.
TIM A

Well I hate to burst your bubble Mr. Tim, but UP's Big Boy steam engines were were quite a big sucess with the UP, just as the DDA40X was also. Bigger may not be better for every RR, however, both the Big Boy and DDA40X fit UP's style of railroading very well. UP liked to run large and long heavy trains (without helpers if possible) and the DDA40X provided the horsepower and tractive effort to do that.

[Anonymous]

QUOTE: Originally posted by TARGUBRIGHT

You would think Union Pacific had learned from the Big Boy failure, "Bigger is not better". I am surprised the SD90mac's are not seeing some of these problems.
TIM A

Well I hate to burst your bubble Mr. Tim, but UP's Big Boy steam engines were were quite a big sucess with the UP, just as the DDA40X was also. Bigger may not be better for every RR, however, both the Big Boy and DDA40X fit UP's style of railroading very well. UP liked to run large and long heavy trains (without helpers if possible) and the DDA40X provided the horsepower and tractive effort to do that.

[cbq9911a]

The DD40X at IRM in Union, 6930, "ran" last weekend at Member's Weekend. Essentially a control cab; SP SD7 1518 was doing the work. But it looked impressive on a 20 car freight.

[cbq9911a]

The DD40X at IRM in Union, 6930, "ran" last weekend at Member's Weekend. Essentially a control cab; SP SD7 1518 was doing the work. But it looked impressive on a 20 car freight.

[Mookie]

QUOTE: Originally posted by mudchicken

Pop quiz maybe not so good an option about now? Save the claws and teef for some smaller critter (sans beak & talons) that deserves the rath of mookie. I'd like to get thru Nebraska undamaged next week!

MC

I ordered you some really nice weather for your fly-by. And how about those Huskers! Now that I have said that, they will fall on their faces!

Moo

[Mookie]

QUOTE: Originally posted by mudchicken

Pop quiz maybe not so good an option about now? Save the claws and teef for some smaller critter (sans beak & talons) that deserves the rath of mookie. I'd like to get thru Nebraska undamaged next week!

MC

I ordered you some really nice weather for your fly-by. And how about those Huskers! Now that I have said that, they will fall on their faces!

Moo

[Anonymous]

a few nice links:
http://www.execulink.com/~nomad/ddax40.htm
http://www.steamlocomotive.com/centennials/

[Anonymous]

a few nice links:
http://www.execulink.com/~nomad/ddax40.htm
http://www.steamlocomotive.com/centennials/

[Anonymous]

Someone posted that the DD40X were failures. NOT TRUE They averaged over 2 million miles apiece. DEFINATELY NOT FAILURES. Now add the fact that so many of them still exist and it becomes a TRIBUTE to that model.

(Alex and Mitchell--I am trying REAL HARD, you should be proud of me.)

[Anonymous]

Someone posted that the DD40X were failures. NOT TRUE They averaged over 2 million miles apiece. DEFINATELY NOT FAILURES. Now add the fact that so many of them still exist and it becomes a TRIBUTE to that model.

(Alex and Mitchell--I am trying REAL HARD, you should be proud of me.)