Covered hopper 78597 (2970 cubic feet, built February 1975) March 1994 - Ft. Worth, Texas

The car pictured ooks well used. Well after when the car was designed by ACF in early 1960's.
My junior year at Washington University [1964] I had a summer job at ACF St. Charles, MO.
Evolved, I had to jack-up a center flow car and then measure the springs' constant.
That was to have some idea about the car's natural frequency [vibrations] and if it could be prone to derailing.
That summer, I worked in their labs to have data on a wide variety of granular bulk materials
that could be unloaded by pneumatic conveying. Also to create a design formula for sizing blower requirements
for within pneumatic conveying systems. That was key to Monsanto wishing me to be in
their new Central Engineering Department [1965]. That provided bread on my family's table up to 2001.