Blade geometry

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The term blade geometry refers to the physical properties of a sword blade: cross-section (or grind) and taper.

Grind

A blade's grind is its cross-sectional shape in a plane normal to the edge. Grind differs from blade profile, which is the blade's cross-sectional shape in the plane containing the blade's edge and the centre contour of the blade's back.

Contents

Cross-section

The cross-section of a blade is the primary way of determining its function and place in history.

Blade sharp cutting part of a weapon or tool

A blade is the portion of a tool, weapon, or machine with an edge that is designed to puncture, chop, slice or scrape surfaces or materials. Blades are typically made from materials that are harder than those they are to be used on. Historically, humans have made blades from flaking stones such as flint or obsidian, and from various metal such as copper, bronze and iron. Modern blades are often made of steel or ceramic. Blades are one of humanity's oldest tools, and continue to be used for combat, food preparation, and other purposes.

Early Middle Ages

Early Viking and medieval European blades tended to have a lenticular cross-section. This type of design lacks a strong central ridge in the middle of the blade. The flexibility these blades have illustrates the purpose that they served, as primarily cutting weapons, that could also be used with the thrust.

Late Middle Ages

With the improvement in the defensive capabilities of armor in the High and Late Middle Ages, the cross-section of the sword blade adapted to suit the needs of warriors. Swords began to favour rigidity over flexibility as more rigid blades allowed for the stronger thrusts that were used to pierce armour. These blades were made with a diamond cross-section, which could be more or less acute, depending on the purpose of the blade. Weapons such as the Estoc, for example, would have little to no cutting edge, but they would be very rigid and strong on the thrust. This is opposed by the Longsword which was usually a multi-purpose weapon used for both thrusting and cutting.

High Middle Ages period in European history from 1000-1250 CE

The High Middle Ages, or High Medieval Period, was the period of European history that commenced around 1000 and lasted until around 1250. The High Middle Ages were preceded by the Early Middle Ages and were followed by the Late Middle Ages, which ended around 1500.

"Estoc" is the French name for a type of sword, also called a tuck in English, in use from the 14th to 17th centuries. It is characterized as having a cruciform hilt with a grip for two-handed use and a straight, edgeless, but sharply pointed blade of around 0.91 metres (36 in) to 1.32 metres (52 in) in length.

A longsword is a type of European sword characterized as having a cruciform hilt with a grip for two-handed use, a straight double-edged blade of around 85 to 110 cm, and weighing approximately 1 to 1.5 kg.

The diamond cross-section could also be hollow ground for greater edge sharpness and thrust efficiency, while retaining strong central ridges.

Taper

There are two types of physical blade taper: distal and profile.

Distal tapering refers to a blade's cross-section thinning from its base to its tip. This is used to create the handling characteristics of individual blades and the amount of distal taper varies depending upon the intended purpose of the blade. Many modern replica blades are not made with any distal taper, resulting in a blade that, when wielded, will feel unresponsive and heavy.

Profile taper refers to narrowing upon the edges of the flat of the blade. Blades with a more gradual taper are meant for cutting, whereas blades with an acute taper are usually meant for thrusting.

Related Research Articles

A sword is a bladed weapon intended for slashing or thrusting that is longer than a knife or dagger, consisting of a long blade attached to a hilt. The precise definition of the term varies with the historical epoch or the geographic region under consideration. The blade can be straight or curved. Thrusting swords have a pointed tip on the blade, and tend to be straighter; slashing swords have a sharpened cutting edge on one or both sides of the blade, and are more likely to be curved. Many swords are designed for both thrusting and slashing.

Chisel tool for cutting and carving wood, stone, metal, etc.

A chisel is a tool with a characteristically shaped cutting edge of blade on its end, for carving or cutting a hard material such as wood, stone, or metal by hand, struck with a mallet, or mechanical power. The handle and blade of some types of chisel are made of metal or of wood with a sharp edge in it.

<i>Jian</i>

The jian is a double-edged straight sword used during the last 2,500 years in China. The first Chinese sources that mention the jian date to the 7th century BCE during the Spring and Autumn period; one of the earliest specimens being the Sword of Goujian. Historical one-handed versions have blades varying from 45 to 80 centimeters in length. The weight of an average sword of 70-centimetre (28-inch) blade-length would be in a range of approximately 700 to 900 grams. There are also larger two-handed versions used for training by many styles of Chinese martial arts.

<i>Dao</i> (sword) single-edged Chinese sword primarily used for slashing and chopping

Dao are single-edged Chinese swords, primarily used for slashing and chopping. The most common form is also known as the Chinese sabre, although those with wider blades are sometimes referred to as Chinese broadswords. In China, the dao is considered one of the four traditional weapons, along with the gun, qiang (spear), and the jian.

Small sword light one-handed sword designed for thrusting

The small sword or smallsword is a light one-handed sword designed for thrusting which evolved out of the longer and heavier rapier of the late Renaissance. The height of the small sword's popularity was between mid 17th and late 18th century. It is thought to have appeared in France and spread quickly across the rest of Europe. The small sword was the immediate predecessor of the French duelling sword and its method of use—as typified in the works of such authors as Sieur de Liancour, Domenico Angelo, Monsieur J. Olivier, and Monsieur L'Abbat—developed into the techniques of the French classical school of fencing. Small swords were also used as status symbols and fashion accessories; for most of the 18th century anyone, civilian or military, with pretensions to gentlemanly status would have worn a small sword on a daily basis.

<i>Tantō</i> Japanese dagger

A tantō is one of the traditionally made Japanese swords (nihonto) that were worn by the samurai class of feudal Japan. The tantō dates to the Heian period, when it was mainly used as a weapon but evolved in design over the years to become more ornate. Tantō were used in traditional martial arts (tantojutsu). The term has seen a resurgence in the West since the 1980s as a point style of modern tactical knives, designed for piercing or stabbing.

Kilij sabre

A kilij is a type of one-handed, single-edged and moderately curved saber used by the Uyghur Khaganate, Seljuk Empire, Timurid Empire, Mamluk Empire, Ottoman Empire, and the later Turkic Khanates of Central Asia and Eurasian steppes. These blades evolved from Turko-Mongol sabers that had been used over all the lands invaded or influenced by the Turkic peoples.

The talwar, also spelled talwaar and tulwar, is a type of curved sword or sabre from the Indian subcontinent.

Waster

In martial arts, a waster is a practice weapon, usually a sword, and usually made out of wood, though nylon (plastic) wasters are also available. The use of wood or nylon instead of metal provides an economic and safe option for initial weapons training and sparring, at some loss of genuine experience. A weighted waster may be used for a sort of strength training, making the movements of using an actual sword comparatively easier and quicker. Wasters as wooden practice weapons have been found in a variety of cultures over a number of centuries, including ancient China, Ireland, Scotland, Rome, Egypt, medieval and renaissance Europe, Japan, and into the modern era in Europe and the United States. Over the course of time, wasters took a variety of forms not necessarily influenced by chronological succession, ranging from simple sticks to clip-point dowels with leather basket hilts to careful replicas of real swords.

Sword making, historically, has been the work of specialized smiths or metalworkers called bladesmiths or swordsmiths. Swords have been made of different materials over the centuries, with a variety of tools and techniques. While there are many criteria for evaluating a sword, generally the four key criteria are hardness, strength, flexibility and balance. Early swords were made of copper, which bends easily. Bronze swords were stronger; by varying the amount of tin in the alloy, a smith could make various parts of the sword harder or tougher to suit the demands of combat service. The Roman gladius was an early example of swords forged from blooms of steel.

Oakeshott typology

The Oakeshott typology was created by historian and illustrator Ewart Oakeshott as a way to define and catalogue the medieval sword based on physical form. It categorizes the swords of the European Middle Ages into 13 main types labelled X to XXII. Oakeshott introduced it in his treatise The Archaeology of Weapons: Arms and Armour from Prehistory to the Age of Chivalry in 1960.

Gothic hilted British infantry swords (1822, 1827, 1845, 1854 and 1892 patterns)

The gothic hilted swords were a family of swords carried by officers and some NCOs of the British Army between 1822 and the present day. They were primarily infantry swords, although they were also regulation pattern for some other officers such as surgeons and staff officers. The term “Gothic hilt” is derived from a perceived similarity between the curved bars of the guard and the arches found in Gothic architecture. They were elegant aesthetically pleasing weapons, although they were considered by some to be mediocre fighting swords. The weapon and its variants had a very long service life.

War scythe pole weapon

A war scythe or military scythe is a form of pole weapon with a curving single-edged blade with the cutting edge on the concave side of the blade. Its blade bears some superficial resemblance to that of an agricultural scythe from which it likely evolved, but the war scythe is otherwise unrelated to agricultural tools and is a purpose-built infantry melee weapon. The blade of a war scythe has regularly proportioned flats, a thickness comparable to that of a spear or sword blade, and slightly curves along its edge as it tapers to its point. This is very different from farming scythes, which have very thin and irregularly curved blades, specialised for mowing grass and wheat only, unsuitable as blades for improvised spears or polearms.

Parrying dagger small bladed weapon were used as an off-hand weapon in conjunction with a single-handed sword

The parrying dagger is a category of small handheld weapons from the European late Middle Ages and early Renaissance. These weapons were used as off-hand weapons in conjunction with a single-handed sword such as a rapier. As the name implies they were designed to parry, or defend, more effectively than a simple dagger form, typically incorporating a wider guard, and often some other defensive features to better protect the hand as well. They may also be used for attack if an opportunity arises. The general category includes two more specific types, the sword breaker and trident dagger.

The 1897 pattern infantry officers’ sword is a straight-bladed, three-quarter basket hilted sword that has been the regulation sword for officers of the line infantry of the British Army from 1897 to the present day.

Dahong palay single-edged sword from the Philippines

The Dahong Palay, literally "rice leaf" in Tagalog, is a single-edged sword from the Philippines, specifically the Southern Tagalog provinces of Batangas and Mindoro. The sword's name could either be a reference to the similarity of its shape to the leaves of rice or to local green snakes "dahong palay", purported to be extremely venomous. The snake is probably green specimens of the Philippine Pit Viper, Trimeresurus flavomaculatus, though it is sometimes identified as various relatively harmless green snakes, like vine snakes. The dahong palay was originally used as a farmer's tool, for clearing thick grass growths. However, during the Philippine revolution of 1896, farmers from Batangas soon came to favor it for its slashing and thrusting "feel".

References

http://www.myarmoury.com/feature_properties.html