Wow. According to the link in Rusty's post, it maxed out the PRR test plant at just 37.5 mph and much less than a 100% firing rate. It was the most powerful loco they had tested up to that point (1926.) So I guess it was more powerful than an I1 Decapod, M1 Mountain, and ??
Erie's Super-Power Berks came just one year later. I wonder why the Erie shunned this big Baldwin, and how the two classes compared when tested on that road?