what on earth is an SD-20-2?

S

sawyer811

MKT Forever and always
while trolling RRPictures.net, i came across this:

3534.1303331256.jpg


the description calls them SD-20-2s. I've heard of SD-20s, but i though those were just SD7/9/18 rebuilds by the ICG. What on earth are these things? I may not be a diesel expert, but i see no relation to any EMD GP unit, namely the GP20. Anybody got a cluewaght they are?:confused:
 
wow, I spend half of my time on wikipedia searching engine wheel arrangements and classes and i didn't even think to wikipedia these things. :eek:

well, anyway, thank you for telling me. I can now add knowledge of one more class of locomotive to my memory banks (that sounded extremely nerdy:eek: :o)
 
Chicago & Northwestern was infamous for that type of kitbashing (C&NW nickname "Cheap & Nothing Wasted") including tossing F7 engines and geep hoods on Alcos - what do you call it after that? :hehe: This one;

http://www.cnwhs.org/memberphotos/displayimage.php?album=7&pos=47

They needed passenger engines so they chopped one end off half a dozen E8 B units, welded on a cab, and called them E8 A - even tho they looked nothing like an E8 A, they didn't look like an E8 B anymore either.
 
sawyer811 said:
wow, I spend half of my time on wikipedia searching engine wheel arrangements and classes and i didn't even think to wikipedia these things. :eek:

well, anyway, thank you for telling me. I can now add knowledge of one more class of locomotive to my memory banks (that sounded extremely nerdy:eek: :o)
Click to expand...
You're welcome:) you can type make and model like EMD e7 or 8 on wiki as airplane boeing 367-80 know Dash 80 pre 707 too :clap:

John
 
sniper297 said:
Chicago & Northwestern was infamous for that type of kitbashing (C&NW nickname "Cheap & Nothing Wasted") including tossing F7 engines and geep hoods on Alcos - what do you call it after that? :hehe: This one;

http://www.cnwhs.org/memberphotos/displayimage.php?album=7&pos=47

They needed passenger engines so they chopped one end off half a dozen E8 B units, welded on a cab, and called them E8 A - even tho they looked nothing like an E8 A, they didn't look like an E8 B anymore either.
Click to expand...

from what i've read, the C&NW's AS415s with dynamic brake blisters were actually the ex-MKT "morphodite" conversions done by EMD themselves, a product of the railway wrecker William Deramus. I could be wrong, but RRpictures.net has never lied to me before. Not saying the C&NW didn't do any of the other stuff either.
 
From the provided picture I would hazard to guess that these were SD-20's that were engineered to carry smaller SD-20's on their roofs for emergency use.:hehe:
 
sniper297 said:
Chicago & Northwestern was infamous for that type of kitbashing (C&NW nickname "Cheap & Nothing Wasted") including tossing F7 engines and geep hoods on Alcos - what do you call it after that? :hehe: This one;

http://www.cnwhs.org/memberphotos/displayimage.php?album=7&pos=47

They needed passenger engines so they chopped one end off half a dozen E8 B units, welded on a cab, and called them E8 A - even tho they looked nothing like an E8 A, they didn't look like an E8 B anymore either.
Click to expand...


Thats another one on my to-do list.
 
They ran these a decent amount with ex-GP7/9 yard slugs.
co141t-ags.jpg


B&O's were numbered 138T and 139T (incidentally not the only 138T and 139T on the Chessie System, as WM's two slugs also had those numbers.)

Both are on my modeling list (HO scale, but I guess I wouldn't say Trainz is
completely out of the question.)
 
...a real novelty...

:cool: I saw these too...

It took me a minute, but the Chessie System pretty much kept along standards that can easily be interpreted...

Those of course are SD35's that have lost their turbo(you see two exhaust stacks), were set up in permanent parallel(transition removed), & since they had to screw up the hood they removed the dynamics.

The idea was to make hump-sets.

Thanks for bringing this up, as they would be a cool minute in Trainz...:p

The Chessie System Class 7700 SD20 would be a two-thousand horsepower SD. The loss of turbocharger means no problem with an overheated turbo(from running past notch 4 too much) & derating the Series 567C engine works out to compensate in fuel efficiency. They possibly could have used the SD38 as a prototype for this Capital Rebuild project.

They also could have been upgraded to Series 645 power-packs. Notice the 36" fans were also removed. Double-clasp brakes made for instant stopping, needed for hump-yard work.

I just have to wonder what happened to these?
 
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Wikipedia said the Ohio Central System owns two, and sold a third to the Pacific Harbor Line. the fourth was cut up:(
 
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