New Product Spotlight – LEGACY SD70MAC

Lionel Trains

As AC traction motor technology improved in the 1990s, the SD70MAC emerged as ideal power for heavy trains.

Prototype Background

6-81134 Burlington Northern 6-81134 Burlington Northern

Billed as the biggest technological development since the switch from steam to diesel, improvements in AC traction motor technology promised major changes in how railroads ran trains and assigned power.

Diesels with conventional DC traction motors can develop a lot of power at low speed, but only for a short period of time before the motors will overheat. AC traction motors on the other hand can run at full power without overheating for a long time. This gives AC motored locomotives an advantage in hauling heavy drag freights like coal trains. After testing EMD’s SD60MAC prototypes, Burlington Northern determined they could replace five aging SD40-2 and C30-7 locomotives with just three new SD70MACs on their Powder River Basin coal trains. Burlington Northern’s initial order for 350 SD70MACs brought AC traction…

View original post 359 more words

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s