Union Pacific 3900 Series 4-6-6-4 Challenger drawings, engine only- Cylinder 21” x 32” – Front Unit (3,4)
		SKU/Drawing Number: 314-CA-30917
			| Wheel Arrangement: | 4-6-6-4 | 
| Scale to 1 ft.: | 2” | 
| Drawing Title: | Cylinder 21” x 32” – Front Unit (3,4) | 
| DWG. Size (in): | 30x90 |