Recurve (other)
Recurve may refer to any of several things named for the notion of curving back: * Recurve (landform), the hook at the tip of a coastal spit * Recurve bow, a type of bow used in archery * A knife blade shape with a concave portion, often exemplified by a kukri See also * Reverse curve *S Curve (other) S curve or S-curve may refer to: * S-curve (art), an "S"-shaped curve which serves a wide variety of compositional purposes * S-curve (math), a characteristic "S"-shaped curve of a Sigmoid function * S-curve corset, an Edwardian corset style * S-C ...

Recurve (landform)
A spit or sandspit is a deposition bar or beach landform off coasts or lake shores. It develops in places where re-entrance occurs, such as at a cove's headlands, by the process of longshore drift by longshore currents. The drift occurs due to waves meeting the beach at an oblique angle, moving sediment down the beach in a zigzag pattern. This is complemented by longshore currents, which further transport sediment through the water alongside the beach. These currents are caused by the same waves that cause the drift. Hydrology and geology Where the direction of the shore inland ''re-enters'', or changes direction, for example at a headland, the longshore current spreads out or dissipates. No longer able to carry the full load, much of the sediment is dropped. This is called deposition. This submerged bar of sediment allows longshore drift or littoral drift to continue to transport sediment in the direction the waves are breaking, forming an above-water spit. Without the compl ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  

Recurve Bow
In archery, a recurve bow is one of the main shapes a bow can take, with limbs that curve away from the archer when unstrung. A recurve bow stores more energy and delivers energy more efficiently than the equivalent straight-limbed bow, giving a greater amount of energy and speed to the arrow. A recurve will permit a shorter bow than the simple straight limb bow for given arrow energy, and this form was often preferred by archers in environments where long weapons could be cumbersome, such as in brush and forest terrain, or while on horseback. Recurved limbs also put greater stress on the materials used to make the bow, and they may make more noise with the shot. Extreme recurves make the bow unstable when being strung. An unstrung recurve bow can have a confusing shape and many Native American weapons, when separated from their original owners and cultures, were incorrectly strung backwards and destroyed when attempts were made to shoot them. A test performed by Hepworth and ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  

Kukri
The kukri () or khukuri ( ne, खुकुरी, ) is a type of machete with a distinct recurve in its blade. It serves multiple purposes as a melee weapon and also as a regular cutting tool throughout most of South Asia. The ''kukri'', ''khukri'', and ''kukkri'' spellings are of Indian English origin, with the original Nepalese English spelling being ''khukuri''. Originating from the Indian subcontinent, the kukri is the national weapon of Nepal, traditionally serving the role of a basic utility knife for the Nepali-speaking Gurkhas, and consequently is a characteristic weapon of the Nepali Army. There have been, and still are many myths surrounding the kukri since its earliest recorded use in the 7th century—most notably that a traditional custom revolves around the blade in which it must draw blood, owing to its sole purpose as a fighting weapon, before being sheathed. However, they are frequently used as regular utility tools. History Researchers trace the ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  

Reverse Curve
In civil engineering, a reverse curve (or "S" curve) is a section of the horizontal alignment of a highway or railroad route in which a curve to the left or right is followed immediately by a curve in the opposite direction. On highways in the United States reverse curves are often announced by the posting of a W1-4L sign (left-right reverse curve) or a W1-4R sign (right-left reverse curve), as called for in the Manual on Uniform Traffic Control Devices. Reverse curves on the Northeast Corridor The Northeast Corridor (NEC) is an electrified railroad line in the Northeast megalopolis of the United States. Owned primarily by Amtrak, it runs from Boston through Providence, New Haven, Stamford, New York City, Philadelphia, Wilmington, ... in the USA hinder the development of high-speed rail. Reverse curves cause buffer-locking. See also * S bridge * Road curve * Track geometry References Railway track layouts {{engineering-stub ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]