Edit post

Edit your reply below.

Post Body
Enter your post below.
[quote user="UP 4-12-2"]If you study the actual photographs, the UP Challenger heritage is quite obvious.[/quote] Yes John, it is maybe just another point of view of mine, and the Big Boy was certainly built to UP standards, therefore its heritage... But I am not so sure, to determine it as a scaled up Challenger. Look at GP40-2's comment above, it is basically a Yellowstone with an additional leading axle... Hope to give support to this view: The BB was an all new design, improving the first "Baby" Challengers not just by power, also by - a new articulation design, casted frames, roller bearings, exhaust system, firebox...and more. However, the "heavy" Challengers were a scaled down Big Boy ;-) Am I splitting hairs a bit to much of it?  lars
Tags (Optional)
Tags are keywords that get attached to your post. They are used to categorize your submission and make it easier to search for. To add tags to your post type a tag into the box below and click the "Add Tag" button.
Add Tag