What is Union pacific mobile lab?

The Union Pacific "Mobile Lab" or "Mobile Laboratory" was a railroad passenger car converted in the 1960's for testing purposes (mostly of motive power). It was #-ed 210 and it served UP into the 1990's before retirement and rescue by the steam program. Other RR's had similar cars either converted as UP's or purpose built called "Dynamometer Cars."

UP 210 was instrumented to monitor Motive Power performance such as drawbar pull etc. The car had living quarters for the crew as well as many instruments with which to perform their jobs. It was converted from a Pullman "Balsam Fir."

You might find this car accompanying new motive power or demonstrators on the road to get true performance data for the the mechanoal and operating departments.

Overland Models produced one in Brass in HO Scale too.