This is an old 2-8-2 Mikado Steam engine model. I used Big Ben Bricks to make the large Drivers. Getting this engine (or any engine) to articulate curves is always a challenge. The tender is powered, for there is no room in the 2-8-2 driver sceme to fit the motor.
Here is the Idea:
Here is the new model with a smaller cab and more boiler space:
Here are some pictures of the turning ability of the design: