Railroading Glossary
The following glossary is arranged alphabetically with each term catalogued by first letter. Select a letter below to begin.
A | B | C | D | E | F | G | H | I | J | K | L | M
N | O | P | Q | R | S | T | U | V | W | X | Y | Z
Jawn Henry
Experimental coal-fired steam turbine locomotive, built in 1954 by Baldwin-Westinghouse for the Norfolk & Western Railroad. Weighing 409 tons, and rated at 4500 h.p., the locomotive produced 199,000 pounds of tractive effort and could haul more tonnage on less fuel than convention steam engines, but at lower speeds. The engine was scrapped in 1957.
Johnson bar
The reverse lever of a steam locomotive. The movement of the lever also regulates the timing of the valves, which controls the flow of steam into the cylinders, where it expands and pushes the pistons that drive the rods which turn the wheels. The Johnson's bar's function is analogous to that of a gear-shift lever in a manual transmission automobile.
Joint operation
Operation of two railroads as one unit under two separate boards of directors.
Jointed rail
Rail in standard sections (usually 39 feet) that was bolted together, as opposed to continuously welded rail.
Jumpover
A structure carrying one set of tracks over another set of tracks for the purpose of eliminating movement conflicts that would have occurred had the two sets of tracks crossed at grade. Also known as a flyover.
Junction
The convergence of two or more railroad lines.
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