Union Pacific Yard locomotive (UPY) 733 along with the 731 east of Ames, IA on May 27, 2011.

UPY 733 and 731 hustle east of Ames, IA on May 27, 2011.

UPY MP15AC 733 eastbound along with the 731 hustle a load of grain cars east of Ames, IA on a gloomy May 27, 2011. The 733 was originally the Missouri Pacific 1733, while the 731 was the MP 1731. Because of their fan system some folks call these locomotives "mini tunnel motors".

Sony SLT-A55V - 1/640 - f/8 - ISO 400 - Sony 70-400mm f/4.5-5.6 SSM G lens @150mm (eff 225 mm). Raw image processed with Raw Photo Processor (RPP).

This work is copyright 2011 by John L. Mathis , but licensed under a Creative Commons License.