Prototypes History

Histrorical discription of the SJ steam Loco Class Sa, roadumber 938.

Technical description of the SJ steam Loco Class Sa, Roadnumber 938.

Presentation of the SJ Postal and 3:rd class passenger car class CD 3, roadnumber 3271

Presentations of the SJ goodscar typ F5, roadnumber 25756 and passenger car type C3d, roadnumber 2168.

Introduction to the MÃ¤rklin Steam Loco Big Boy art no 37990, Union Pacific class 4000, roadnumber 4013.

Picture showing the Loco pulling a fully loaded freight train across the prairie of eastern Wyoming.

The history of the legend Union Pacific Big Boy

The most interesting information about the Big Boy, Page 1.

The most interesting information about the Big Boy, Page 2.

Presentation of the MÃ¤rklin model art no 34990 with DELTA decoder.

Presentation of the MÃ¤rklin model art no 37990 with 2 digital Decoders (Motorola)

Detailed description of the Big Boy part 1.

Detailed decription of the Big Boy part 2.

Detailed description of the propulsion and the runng gear technology, part 1.

Detailed description of the propulsion and the runng gear technology, part 2.