ScaleTrains 38479 HO Scale GE AC4400CW Diesel Southern Pacific SP 146 LokSound Outcast 8S Reverse polarity protection*

Reverse polarity protection*

While the all new SIDEWINDER 4™ builds upon Castle’s most popular platform

Through subsequent rebuilding and modernization

ABS Plastic Tender Body

They also made several improvements on the GP20 design meant to match the U25B - a sealed airtight long hood

ScaleTrains 38479 HO Scale GE AC4400CW Diesel Southern Pacific SP 146 LokSound Outcast 8S Reverse polarity protection*ScaleTrains 38479 HO Scale GE AC4400CW Diesel Southern Pacific SP 146 LokSound Throughout the history of rail transportation, there have been innovations that revolutionized the industry. From Andrew Beards patented designs in the late 1800s that resulted in the automatic couplers that are still used today, to the adoption of diesel technology for locomotive propulsion, these seemingly small developments would lead to massive changes in the industry.