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Timeline:

Notes:

 

TTX Double-Stack Fleet As-Built
Model Well
Configuration
Qty TTX Class Notes Years Active HO Scale Model
Thrall Car Manufacturing
100-ton Articulated Cars:
Lo-Pac 2000  40' 40' 40' 40' 40' 296

 TWG5M
TWG50
TWG50A
TWG50B
TWG50C
TWG50H
TWG5BM
TWG51
TWG53

Capable of carrying 48' containers in the top positions. Design licensed from Budd. 1988- InterMountain
  40' 45' 48' 45' 40' 1 TWG50P       
  40' 45' 45' 45' 40' 25 TWG50F    1988-   
  40' 48' 48' 48' 40' 408 TWG50G
TWG50K
TWG50L
     
  45' 45' 45' 45' 45' 23 TWG50D
TWG50J 
  1986-   
  48' 48' 48' 48' 48' 40 TWG50E    1989-   
125-ton Articulated Cars:
  40' 48' 48' 48' 40' 292  TWG52       
  48' 48' 48' 48' 48' 1,381 TWG52A
TWG52B
TWG52C 
     
  53' 53' 53' 53' 53' 1  TWG53P      
  53' 53' 53' 751 TWG33P
TWG33
    Atlas
728688
Single-Unit COFC-only Cars:
Well Runner 48' 962  TWF10
TWF10A
TWH10
TWH10P
     
Drawbar-Connected COFC-only Cars:
  48' 48' 48' 300  TWG30   1991-   
  48' 48' 48' 48' 138  TWG40   1991-   
Single-Unit All Purpose Cars:
  48' 150  TWA10      
Drawbar-Connected All-Purpose Cars:
  48' 48' 48' 116  TWA30      
Gunderson
100-ton Articulated Cars:
Twin-Stack 40' 40' 40' 40' 40' 343 GWG50
GWG50A
GWG50B
GWG50C
GWG50D
GWG50E
GWG50F
GWG50G
GWG50H
GWG50J
End bulkheads to retain upper containers.   InterMountain 
125-ton Articulated Cars:
 Maxi-Stack I 40' 40' 40' 40' 40' 3,214 GWG52
GWG52D
GWG52E
GWG52G
GWG52H
GWG52I
     Athearn
  40' 48' 48' 48' 40' 43 GWG52A       
Maxi-Stack III  48' 48' 48' 48' 48' 2,496 GWG52B
GWG52C
GWG52F
    Athearn
Maxi-Stack V  53' 53' 53' 53' 53' 1 GWG53P       
Maxi-Stack IV  53' 53' 53' 7,680 GWG33
GWG33A
GWG33B
GWG33C
GWG33D
GWG33E
GWG33P 
    InterMountain
Kato 
766519
Single-Unit COFC-only Cars:
Husky Stack  48' 875 GWF10     1991- Athearn
InterMountain
Husky Stack   53' 2,130  GWF13   2003-  Rapido 
  56' 101  GWF11      
Drawbar-Connected COFC-only Cars:
  48' 48' 48' 48' 60 GWG40       
Single-Unit All Purpose Cars:
Husky Stack AP  48' 947 GWA10       
Drawbar-Connected All-Purpose Cars:
  48' 48' 48' 873 GWA30       
  48' 48' 48' 48' 200 GWA40       
Trinity Industries
100-ton Articulated Cars:
BackPacker  40' 40' 40' 40' 40' 71 RWG50
RWG50A
RWG50B
RWG50C
RWG50P 
    ScaleTrains
125-ton Articulated Cars:
  40' 40' 40' 40' 40' 5 RWG52A      
  40' 48' 48' 48' 40' 117 RWG52    1987-   
Backpacker  48' 48' 48' 48' 48' 116 RWG52B
RWG52C
RWG53 
  1990-   
  53' 53' 53' 53' 53' 1        
  53' 53' 53' 1,236 RWG33
RWG33A
     
Single-Unit COFC-only Cars:
Well Runner  48' 1 RWH10P       
Drawbar-Connected COFC-only Cars:
  53' 53' 53' 160  RWG30      
Single-Unit All Purpose Cars:
  48' 10 RWA10       
National Steel Car (NSC)
125-ton Articulated Cars:
  40' 40' 40' 40' 40' 310  NWG52
NWG52A
     
  48' 48' 48' 286  NWA33      
Super Stack 53' 53' 53' 53' 53' 1        
  53' 53' 53' 5,428 NWG33A
NWG33B
NWG33C
NWG33D
NWG33E
NWG33F
NWG33P
     
Single-Unit COFC-only Cars:
  53' 6,190 NWF13
NWF13A
    Walthers
Drawbar-Connected COFC-only Cars:
  48' 48' 48' 744  NWG31   1998-   
  53' 53' 53' 1,022  NWG33      
Drawbar-Connected All-Purpose Cars:
  48' 48' 48' 80 NWA31    1995 Walthers
  48' 48' 48' 48' 120  NWA40      
Freight Car America
125-ton Articulated Cars:
Dynastack 40' 40' 40' 40' 40' 50 NWG52L    2008-  
  53' 53' 53' 100 NWG30      Walthers 
Single-Unit COFC-only Cars:
   53'  1        
Unidentified Builder
  40' 40' 40' 40' 40' 50 JWG52   2013-  
  53' 53' 53'   JWG33   2016-  

TTX Double-Stack Rebuilds

Articulated Cars or Drawbar-Connected COFC-only Cars:
  40' 40' 40' 40' 40  

TWG51P
TW52BM
TW52CM
TW52N
TW52AN
TW52BN
TW52CN

    Walthers
748410
  40' 40' 40' 40' 40   GW52AM
GW52BM
GW52CM
GW52FM
     Walthers
  40' 40' 40' 40' 40'   RW52M
RW52BM
RW52CM
RW53M
  1988-  
  40' 40' 40' 40' 40'   NWG32M      
  40' 48' 48' 48' 40'   TWG50K
TWG52
  1987  
  48' 48' 48' 1 TWG32C   1992  
Single-Unit COFC-only Cars:
  40'   TWF10F
TWF10M
TWF10N
  1991- Walthers
  40'   GWF10F
GWF10M
  1991-  
  40'   NWF10F
NWF11F
  1994-  
  53'   GW13SF
GWF13S
  1994- Walthers
  53'   NWF13
NW13SF
NW14SF
  1993-  
Single-Unit All Purpose Cars:
  48'   GWA10   1994- Atlas
Walthers
456164