Action may be required on your Trains.com account in order to continue accessing content. Click here to learn more.

Photos & Videos Photo of the Day Under the hood of a hood unit

Under the hood of a hood unit

By Faith Finfrock | December 27, 2020

| Last updated on August 8, 2025

The open hood doors on the left side of a Southern Pacific GP9 reveal the locomotive’s 567C diesel engine, main generator, and auxiliaries.
Photo by EMD

You must login to submit a comment

Card image cap

Photo of the Day

Classic Trains

CN 2-8-0 at Chipman, N.B.

Card image cap

Photo of the Day

Classic Trains

Santa Fe RDC on the Reading

Card image cap

Photo of the Day

Classic Trains

Pennsy’s “Big Engine” in the snow

Card image cap

Photo of the Day

Classic Trains

GG1 helping a Metroliner

Shop our Trains.com Store

Members enjoy 15% off any purchase in our store. Join Today!

Amtrak’s History Through Its Equipment

This book brings to life the evolution of the U.S. national passenger rail system, from its patchwork beginnings to today’s high-speed locomotives and cars.

Classic Trains Hat

Celebrate your favorite historical railroading magazine with this exclusive Classic Trains hat.

Classic Trains 2026 Calendar

The Classic Trains calendar is back for 2026 featuring 12 historic railroad photos.

Fallen Flags: Southern Pacific Remembered

This tribute to one of the most iconic railroads in history features in-depth stories, captivating photography, and rare insights into the Southern Pacific system.