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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 age17 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 repair shop, 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 prote ... [...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, bladesmith, forging to shape, damascus steel, welded lamination or investment casting, investment cast. Typical metals used come from the carbon steel, tool 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 ... [...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 defined as the combination of '' form drag'' and '' skin friction drag''. It is named as such because it is not useful, in contrast with lift-induced drag which is created when an airfoil generates lift. All objects experience parasitic drag, regardless of whether they generate lift. Parasitic drag comprises all types of drag except lift-induced drag, and the total drag on an aircraft or other object which generates lift is the sum of parasitic drag and 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 wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Weapon Designers
A weapon, arm, or armament is any implement or device that is used to deter, threaten, inflict physical damage, harm, or Death, kill. Weapons are used to increase the efficacy and efficiency of activities such as hunting, crime (e.g., murder), law enforcement, self-defense, warfare, or suicide. In a 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 such as rock (geology), rocks and bottles can be improvised weapon, used as weapons, many objects are expressly designed for the purpose; these range from simple implements such as club (weapon), clubs and swords to complicated modern firearms, tanks, missiles and biological warfare, biological weapons. Something that has been repurposed, converted, or enhanced to become a weapon of war is termed ''weaponized'', such as a biological warfare, weaponized virus or laser weapon, weaponized laser. Histo ... [...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 the work of art. The most 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 to refer to actors, musicians, singers, dancers and other performers, in which they are known as ''Artiste'' instead. ''Artiste'' (French) is a variant used in English in this context, but this use has become rare. The use of the term "artist" to describe writers is valid, but less common, and mostly restricted to contexts such as critics' reviews; "author" is generally used instead. Dictionary definitions The ''Oxford English Dictionary'' defines the older, broader meanings of the word "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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Knife Makers
A knife (: 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 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 hikers carry a pocketknife; there are kitchen knives for preparing foods (the chef's knife, the paring knife, bread knife, cleaver), table knife (butter knives and steak knives), weapons (daggers or switchblades), knives for throwing or juggling, and k ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Newport Beach, California
Newport Beach is a coastal city of about 85,000 in southern Orange County, California, United States. Located about southeast of downtown Los Angeles, Newport Beach is known for its sandy beaches. The city's harbor once supported maritime industries. 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. The Spanish Empire colonized the land, followed by Alta California, Mexicans and Treaty of Gua ... [...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 th ... [...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, originating from Marine Force Recon (FORECON). 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 1 November 2005 by U.S. Secretary of Defense 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 (F ... [...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 United States Navy's primary special operations force and a component of the United States 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 kill high-level targets, or to gather intelligence behind enemy lines. SEAL team personnel are hand-selected, highly trained, and highly proficient in unconventional warfare (UW), direct action (DA), and special reconnaissance (SR), among other tasks like sabotage, demolition, intelligence gathering, and hydrographic reconnaissance, training, and advising friendly militaries or other forces. All active SEALs are members of the U.S. Navy. History Origins Although not formally founded until 1962, the modern-day U.S. Navy SEALs trace their roots to World War II. The U ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Samurai
The samurai () were members of the warrior class in Japan. They were originally provincial warriors who came from wealthy landowning families who could afford to train their men to be mounted archers. In the 8th century AD, the imperial court downsized the national army and delegated the security of the countryside to these privately trained warriors. Eventually the samurai clans grew so powerful that they became the ''de facto'' rulers of the country. In the aftermath of the Gempei War (1180-1185), Japan formally passed into military rule with the founding of the first shogunate. The status of samurai became heredity by the mid-eleventh century. By the start of the Edo period, the shogun had disbanded the warrior-monk orders and peasant conscript system, leaving the samurai as the only men in the country permitted to carry weapons at all times. Because the Edo period was a time of peace, many samurai neglected their warrior training and focused on peacetime activities such as a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Halifax Citadel
Citadel Hill is a National Historic Sites of Canada, National Historic Site in Halifax, Nova Scotia, Canada. Four fortifications have been constructed on Citadel Hill since the city was founded by the British 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
