The film discusses various types of engines that utilize heat energy for operation. It explains steam engines, which are reciprocating external combustion engines, and compares them to internal ...
YORK COUNTY, Pa. — A York County man is sharing his passion for trains with the community. "This started with me probably when I was 2 [or] 3 years old," said 19-year-old Nathan Heffner. "It was ...
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