Got It, that helped...........................
1942, Lima built the first of the Allegheny type for C&O. This is the class H8 2-6-6-6.
C&O got 60 of 'em. In 1945 the Virginian had 8 copies made.
These engines were articulated with 221/2" by 33" cylinders, 67" drivers, weighed 753,000 lbs and tractive effort of 110,200 lbs. Worthington feedwater heaters, roller bearings on main axles and leading truck.
In contrast the last of the Challenger series employed 21" by 32" cylinders, 69" drivers weighed 627,000 lbs, tractive effort of 97,350 lbs.
Ok, I can't help it. I'm bias toward Norfolk & Western..... check this out. These are some of the engines O. Winston Link photographed along the New River... ...
N&W Y6b; 2-8-8-2
cylinder of 25"/39"dia by 39" stroke, 58" drivers, weighing in at only 582,900lbs but toting a tractive effort well over 152,000lbs
N&W 4-8-4 "J" Class (these are the streamlined suckers running through the Shenandoah)
27"x32" cylinders, 70"drivers, 300lbs steam,weighed 494,000lbs rated at 80,000 tractive effort, pulling a 15 car passenger train at... ... ... ... ... ... ... ... . 110MPH :--)
Greenleaf