Skip to content

The Santa Fe Was DPU Before DPU Was Cool

September 10, 2011

Before Distributed Power locomotives (DPU’s) became commonplace, the Santa Fe and the Southern Pacific used unmanned helper locomotives with an early version of DPU technology.

The Santa Fe installed Locotrol II equipment in its re-built U36C fleet in the mid 1980’s. This  allowed remote control operation of mid-train helper engines. Even numbered units were masters, and would be used as the lead unit. Odd numbered units were the remotes, receiving radio commands from the lead unit.

Here we see a 785 train (Rustler Springs, NM – Galveston, TX sulfur unit train) approaching Wallis, Texas on May 5, 1990, with SF30C 9550  leading a SD45-2B and an SD45 on the head end.

ATSF SF30C 9550 leads a Duval sulfur unit train near Wallis, TX

The remote locomotive consist  is B40-8 7414 MU’d to  remote receiver SF30C 9519.

In a page straight out of the Southern Pacific playbook, a Santa Fe yardmaster has added a fill of loaded grain to what typically always ran a solid train of molten sulfur tankcars.

Advertisements
No comments yet

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