I know I have gone compleatly insane in asking this but, should I try to build this monstrosity? More importanitly what will I use it (them) for? (incert evil laugh here)…

1891. 0-10-0 TANK
WHEN this engine was delivered by the Baldwin Works to the St. Clair Tunnel Company in 1891, it was the heaviest locomotive in the world. It was designed to haul heavy freight trains through the new tunnel under the St. Clair River between Sarnia, Ontario, and Port Huron, Michigan. This bore was 6,000 feet long with approach grades of 1,950 and 2,500 feet respectively, or an average of 105 feet to the mile. The engine was well designed, all of its weight being available for traction. All wheels with the exception of the center pair were flanged and had brakes. Hard coal was used as fuel.
Cylinders 22 by 28 inches Weight 195,000 pounds Drivers 50 inches in diameter Total wheelbase 18 feet 5 inches Tank capacity 1,800 gallons, 3 tons fuel Tractive force 58,000 pounds
and …

1863. THE PENNSYLVANIA
THE first engine to be built with six pairs of driving wheels was the Pennsylvania, designed by James Milholland and completed at the Philadelphia & Reading Shops in 1863. It was intended and used for pusher service, particularly in handling coal trains over the summit of the hills between the Schuylkill and Delaware Rivers.
Though originally both fuel and water were carried on the engine, when it was rebuilt in 1870, with the rear pair of drivers omitted, a separate tender was attached. The principal reason for its being modified was because it had difficulty in negotiating curves, some of which were as short as 320-foot radius. It was so powerful that it was destructive to the light ca