What exactly do you mean by largest? If you mean by wheel arrangement there were also 2-10-0's, 2-10-2's, 2-10-4's, 4-10-2's, and the UP had 80 or so 4-12-2's. 4-8-4's or Northern types were among the most versatile steam engines made.
-----Original Message-----
From: Michael Graziano <mgraziano@austin.rr.com>
To: ttat-members@aoot.com
Sent: Tue, Apr 13, 2010 1:40 pm
Subject: RE: UP 844 in Magnolia
Were the northerns/niagaras the largest of the non-articulated steam engines in the US?
UP 844 moving south from Navasota and coming into Magnolia TX.