Union Pacific 3900 Series 4-6-6-4 Challenger drawings, engine only- Cylinder 21” x 32” – Rear Unit (3,4)
SKU/Drawing Number: 314-CA-30918
| Wheel Arrangement: | 4-6-6-4 |
| Scale to 1 ft.: | 2” |
| Drawing Title: | Cylinder 21” x 32” – Rear Unit (3,4) |
| DWG. Size (in): | 30x95 |