Tangent
Straight track.
Tank Engine
Steam locomotive that carries its fuel and water supplies in tanks hung over or placed alongside the boiler, or on a frame extension (bunker) at the rear, instead of in a tender.
The ratio of tangential and normal force that exist between the wheel and the rail during motion.
Adhesive Weight
The total of the driving-wheel axle loads.
Tangent Track Straight track. Tare Weight The weight of an empty car.
Line The condition of the track in regard to uniformity in direction over short distances of tangents, or uniformity in variation over short distances on curves.
Adhesion Coefficient (m) The ratio of the tangential and normal forces that exist between the wheel and the rail at standstill and during motion. The adhesion coefficient for rolling motion is usually referred to as m R. Generally taken as 0.3 to 0.
Tallow Pot Fireman Tangent Track Straight track. Tare Weight The weight of an empty car. Team Track A track on which rail cars are placed for the use of the public in loading or unloading freight.
tangent — track that is straight, not curved.
tank car — a car for the carriage of liquids. Modern tank cars usually have a horizontal tank but early ones had one or more vertical tubs mounted on a flat car.
A curve composed of two or more simple curves which join on common tangent points or common easement curves and which lead in the same general direction, i.e., to left or right, but each with different radii.
Curve, easement.
In both cases there is some debate as to whether the sine or the tangent is used, but at normal railway gradients the difference is minimal.
Grade Crossing
RAILWAYS.
One test that creates a false sense of security is using a long tangent (straight and level) length of track where the next signal is plainly visible. This next signal is displaying a more favorable proceed signal such as a clear (green).
Frog number. One-half the cotangent of one-half the frog angle, or the number of units of centerline length in which the spread is one unit. The rate of spread of the gage lines at the frog. The number of units of length for a spread of one unit.
A grade (or gradient) is the pitch of a slope, and is often expressed as a percent tangent, or "rise over run". It is used to express the steepness of slope on a hill, stream, roof, railroad, or road, where zero indicates level
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A curve of gradually increasing radius that makes the transition between a tangent or straight track and a fixed-radius curve.
Spot a car
To place a car in its designated position, as at an industry or on a station track.
When it comes to hills and curves, the Norton Territory had only 1 mile of level track and only 1 mile of tangent (straight) track, all the rest was either up grade, down grade, or curved.
The position of track in the horizontal plane expressed as 'tangent' or 'curve.'
Alignment Control Couplers ...
A section of track whose curvature changes at a constant rate over its length; provides transition from tangent (straight) track to curved track
Split the switch ...
Also known as tangent lead-in.
SPT (UK): Signal-post telephone - A direct no-dial telephone link to the relevant Signal-box, positioned on or near a signal.
Spur (US): A stretch of rail that branches off the main line.
 See also: Point, Track, Points, Switch, Engine
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