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Phill Hartsfield
Phill Hartsfield (August 16,1931 – May 20, 2010) was a Southern California sword and knifemaker based in Garden Grove who is noted for popularizing the chisel ground blade in the western world. Hartsfield's designs have influenced other knifemakers, primarily Ernest Emerson. Early life Hartsfield joined the US Navy at 17 and served as a sonar technician. After serving four years, he was discharged and worked as a television repairman. After six months of working for a repairshop, Hartsfield opened his own repairshop at the age of 22 while making knives part-time. In 1977, he closed his TV repair business and became a full-time knifemaker. Knife making Hartsfield's blades are Japanese-influenced, each one was hand ground from various kinds of tool steel, including 01 and A2. They are differentially edge hardened to RC 60-61 on the Rockwell scale with the remainder of the blade hardened to 58-59 on the scale to allow for flex during the cut. This strength protected the life ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Knifemaking
Knife making is the process of manufacturing a knife by any one or a combination of processes: stock removal, forging to shape, welded lamination or investment cast. Typical metals used come from the carbon steel, tool, or stainless steel families. Primitive knives have been made from bronze, copper, brass, iron, obsidian, and flint. Materials for blades Different steels are suited to different applications. There is a trade off between hardness, toughness, edge retention, corrosion resistance, and achievable sharpness. Some examples of blade material and their relative trade offs: *The newest powder metallurgy steels can be made very hard, but can quickly wear out abrasives and tooling. *A blade made from low carbon or mild steel would be inexpensive to produce and of poor quality. A low carbon blade would be very hard to break, but would bend easily and be too soft to hold an edge. High carbon (or high alloy, in some listings) can take a much higher hardness but must be te ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parasitic Drag
Parasitic drag, also known as profile drag, is a type of aerodynamic drag that acts on any object when the object is moving through a fluid. Parasitic drag is a combination of form drag and skin friction drag. It affects all objects regardless of whether they are capable of generating lift. Total drag on an aircraft is made up of parasitic drag and lift-induced drag. Parasitic drag comprises all types of drag except lift-induced drag. Form drag Form drag arises because of the shape of the object. The general size and shape of the body are the most important factors in form drag; bodies with a larger presented cross-section will have a higher drag than thinner bodies; sleek ("streamlined") objects have lower form drag. Form drag follows the drag equation, meaning that it increases with the square of the velocity, and thus becomes more important for high-speed aircraft. Form drag depends on the longitudinal section of the body. A prudent choice of body profile is essential for a lo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Weapon Designers
A weapon, arm or armament is any implement or device that can be used to deter, threaten, inflict physical damage, harm, or kill. Weapons are used to increase the efficacy and efficiency of activities such as hunting, crime, law enforcement, self-defense, warfare, or suicide. In broader context, weapons may be construed to include anything used to gain a tactical, strategic, material or mental advantage over an adversary or enemy target. While ordinary objects – sticks, rocks, bottles, chairs, vehicles – can be used as weapons, many objects are expressly designed for the purpose; these range from simple implements such as clubs, axes and swords, to complicated modern firearms, tanks, intercontinental ballistic missiles, biological weapons, and cyberweapons. Something that has been re-purposed, converted, or enhanced to become a weapon of war is termed weaponized, such as a weaponized virus or weaponized laser. History The use of weapons is a major driver of cultural ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Artists From California
An artist is a person engaged in an activity related to creating art, practicing the arts, or demonstrating an art. The common usage in both everyday speech and academic discourse refers to a practitioner in the visual arts only. However, the term is also often used in the entertainment business, especially in a business context, for musicians and other performers (although less often for actors). "Artiste" (French for artist) is a variant used in English in this context, but this use has become rare. Use of the term "artist" to describe writers is valid, but less common, and mostly restricted to contexts like used in criticism. Dictionary definitions The ''Oxford English Dictionary'' defines the older broad meanings of the term "artist": * A learned person or Master of Arts. * One who pursues a practical science, traditionally medicine, astrology, alchemy, chemistry. * A follower of a pursuit in which skill comes by study or practice. * A follower of a manual art, such as a m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Knife Makers
A knife (plural, : knives; from Old Norse 'knife, dirk') is a tool or weapon with a cutting edge or blade, usually attached to a handle or hilt. One of the earliest tools used by humanity, knives appeared at least Stone Age, 2.5 million years ago, as evidenced by the Oldowan tools. Originally made of wood, bone, and stone (such as flint and obsidian), over the centuries, in step with improvements in both metallurgy and manufacturing, knife blades have been made from copper, bronze, iron, steel, ceramic, and titanium. Most modern knives have either fixed or folding blades; blade patterns and styles vary by maker and country of origin. Knives can serve various purposes. Hunters use a hunting knife, soldiers use the combat knife, scouts, campers, and hiking, hikers carry a pocket knife; there are kitchen knives for preparing foods (the chef's knife, the paring knife, bread knife, cleaver), table knives (butter knives and steak knives), weapons (daggers or switchblades), knives for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Newport Beach, California
Newport Beach is a coastal city in South Orange County, California. Newport Beach is known for swimming and sandy beaches. Newport Harbor once supported maritime industries however today, it is used mostly for recreation. Balboa Island, Newport Beach, Balboa Island draws visitors with a waterfront path and easy access from the ferry to the shops and restaurants. History The Upper Bay of Newport is a canyon carved by a stream in the Pleistocene period. The Lower Bay of Newport was formed much later by sand brought along by ocean currents, which constructed the offshore beach now recognized as the Balboa Peninsula of Newport Beach. For thousands of years, the Tongva people lived on the land in an extensive, thriving community. The Tongva villages of Genga, California, Genga and Moyongna were located in Newport Beach. Throughout the 1800s, Europeans colonized the land and forcibly removed and assimilated the Tongva. Present-day Newport Beach exists upon the unceded homelands of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blade (magazine)
''Blade'' is a consumer magazine about knife collecting. The magazine is based in Appleton, Wisconsin. History and profile First published in 1973 under the title ''American Blade'' by Southern House Publishing Co. with Blackie Collins as the editor. The headquarters was in Chattanooga, Tennessee. The magazine's title was changed to ''Blade'' in 1982 after its purchase by Jim Parker and Bruce Voyles. In the 1980s, the magazine served as the launching point for an annual convention for knife collectors, the Blade Show; established a Cutlery Hall of Fame; and spun off a trade magazine, '' Blade Trade''. In 1994, Voyles, then the sole owner, sold the publication and its properties to Krause Publications, which increased its frequency to monthly. F+W Publications Inc. purchased Krause Publications and ''Blade'' in 2002 and published it under its brand beginning in October 2004. In 2018, Gun Digest Media LLC acquired ''Blade'', Blade Show and all related properties. Coverage in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Marine Corps Forces Special Operations Command
United States Marine Forces Special Operations Command (MARSOC) is a component command of the United States Special Operations Command (SOCOM) that comprises the Marine Corps' contribution to SOCOM. Its core capabilities are direct action, special reconnaissance and foreign internal defense. MARSOC has also been directed to conduct counter-terrorism and information operations. History and lineage Its creation was announced on 23 November 2005 by U.S. Defense Secretary Donald Rumsfeld, following a meeting between him, the SOCOM commander General Bryan D. Brown, and the Marine Corps Commandant General Michael Hagee on 28 October 2005. MARSOC was officially activated on 24 February 2006 with ceremonies at Camp Lejeune, North Carolina. The potential participation of the Marine Corps in SOCOM has been controversial since SOCOM was formed in 1986. At the time, Marine Corps leaders felt that their Force Reconnaissance (FORECON) units were best kept in the Marine Corps' Marine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Navy SEALs
The United States Navy Sea, Air, and Land (SEAL) Teams, commonly known as Navy SEALs, are the U.S. Navy's primary special operations force and a component of the Naval Special Warfare Command. Among the SEALs' main functions are conducting small-unit special operation missions in maritime, jungle, urban, arctic, mountainous, and desert environments. SEALs are typically ordered to capture or to kill high level targets, or to gather intelligence behind enemy lines. All active SEALs are members of the U.S. Navy. The CIA's highly secretive and elite Special Operations Group (SOG) recruits operators from SEAL Teams, with joint operations going back to the MACV-SOG during the Vietnam War. This cooperation still exists today, as evidenced by military operations in Iraq and Afghanistan. History Origins Although not formally founded until 1962, the modern-day U.S. Navy SEALs trace their roots to World War II. The United States Military recognized the need for the covert reconnaiss ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Samurai
were the hereditary military nobility and officer caste of medieval and early-modern Japan from the late 12th century until their abolition in 1876. They were the well-paid retainers of the '' daimyo'' (the great feudal landholders). They had high prestige and special privileges such as wearing two swords and ''Kiri-sute gomen'' (right to kill anyone of a lower class in certain situations). They cultivated the '' bushido'' codes of martial virtues, indifference to pain, and unflinching loyalty, engaging in many local battles. Though they had predecessors in earlier military and administrative officers, the samurai truly emerged during the Kamakura shogunate, ruling from 1185 to 1333. They became the ruling political class, with significant power but also significant responsibility. During the 13th century, the samurai proved themselves as adept warriors against the invading Mongols. During the peaceful Edo period (1603 to 1868), they became the stewards and chamberlains of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Halifax Citadel
Citadel Hill is a hill that is a National Historic Site in Halifax, Nova Scotia, Canada. Four fortifications have been constructed on Citadel Hill since the city was founded by the English in 1749, and were referred to as Fort George—but only the third fort (built between 1794 and 1800) was officially named Fort George. According to General Orders of October 20, 1798, it was named after King George III. The first two and the fourth and current fort, were officially called the Halifax Citadel. The last is a concrete star fort. The Citadel is the fortified summit of Citadel Hill. The hill was first fortified in 1749, the year that Edward Cornwallis oversaw the development of the town of Halifax. Those fortifications were successively rebuilt to defend the town from various enemies. Construction and leveling have lowered the summit by ten to twelve metres. While never attacked, the Citadel was long the keystone to defence of the strategically important Halifax Harbour and its Roy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
