"Four Twelve Two" - Union Pacific 9000 Class Lanoe Hawker easy to fly and recoverable

easy to fly and recoverable from spins

They were more powerful

make flat turns

At the time of this writing

It uses the turbocharged 16 cylinder model 645 prime mover and rides on standard Flexicoil trucks

"Four Twelve Two" - Union Pacific 9000 Class Lanoe Hawker easy to fly and recoverableThe Union Pacific 9000 Class or "Union Pacific" type locomotive has a 4 12 2 wheel arrangement. It is the only steam locomotive to be built with that wheel arrangement. They featured three cylinders and used the conjugated valve gear invented in the United Kingdom by Sir Nigel Gresley. The locomotives were used exclusively by the Union Pacific Railroad and were the largest steam locomotive class built on a rigid frame. It had a wheelbase of over 30