Sand Patch By Angela Cotey | July 20, 2019 | Last updated on August 8, 2025 Email Newsletter Get the newest photos, videos, stories, and more from Trains.com brands. Sign-up for email today! Get Updates Baltimore & Ohio F7s tackle the twisting approach to the Sand Patch summit in southern Pennsylvania with an eastbound coal train in February 1953. The B&O had almost 300 F7 A and B units, in addition to FT, F3, and FP7 models. S.K. Bolton Jr. photo