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François Tamisier
François Tamisier (; 22 January 1809, Lons-le-Saunier, Jura (department), Jura – 20 May 1880, Paris) was a French artillery captain of the 19th century. He invented various methods to improve the rifled gun, particularly ball grooves (not to be confused with the Minié ball). Ball grooves Captain Tamisier obtained a patent in 1841 for a method to improve the accuracy of cylindro-conical shot, by cutting three sharp grooves (French: ''"cannelures"'') on the cylindrical part of the shot. Compared to round shots, which offered a rather inefficient but symmetric and stable aerodynamic round profile, the aerodynamic stability of the cylindro-conical shot had been an issue in early rifled weapons of the type developed by Delvigne. Through Tamisier's method, the resistance of the air behind the center of gravity of the shot was increased, thereby increasing its stability. The Tamisier grooves greatly improved the efficiency of the cylindro-conical bullet. However they rendered t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early Cylindrical Bullets
{{disambiguation, geo ...
Early may refer to: History * The beginning or oldest part of a defined historical period, as opposed to middle or late periods, e.g.: ** Early Christianity ** Early modern Europe Places in the United States * Early, Iowa * Early, Texas * Early Branch, a stream in Missouri * Early County, Georgia Other uses * ''Early'' (Scritti Politti album), 2005 * ''Early'' (A Certain Ratio album), 2002 * Early (name) * Early effect, an effect in transistor physics * Early Records, a record label * the early part of the morning See also * Earley (other) Earley is a town in England. Earley may also refer to: * Earley (surname), a list of people with the surname Earley * Earley (given name), a variant of the given name Earlene * Earley Lake, a lake in Minnesota *Earley parser, an algorithm *Earley ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lons-le-Saunier
Lons-le-Saunier () is a Communes of France, commune and capital of the Jura (department), Jura Department, eastern France. Geography The town is in the heart of the Revermont region, at the foot of the first plateau of the Jura massif. The Jura escarpment extends to the east and south, while to the west lies the plain of Bresse and to the north extensive vineyards. The river Vallière (river), Vallière runs through the town, rising in a typical Jura blind valley not far away, at Revigny. It has been conduited since the 1960s on grounds of hygiene, since sewage outlets run into it. A small section remains in the open air near the parc des Bains, and only a single bridge (the pont de la Guiche) remains. The town is approximately equally placed between Besançon, Dijon, Bourg-en-Bresse and Geneva, though the last of these lies on the other side of the Jura massif. It is served by the A39 autoroute, by which Dijon can be reached in about an hour and Lyon in an hour and a half. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jura (department)
Jura ( , ) is a department in the Bourgogne-Franche-Comté region in Eastern France. Named after the Jura Mountains, its prefecture is Lons-le-Saunier. Its subprefectures are Dole and Saint-Claude. In 2019, Jura had a population of 259,199.Populations légales 2019: 39 Jura INSEE Its INSEE code is 39. It has a short portion of the border of Switzerland. History Historically, Jura belonged to the |
Minié Ball
The Minié ball or Minie ball, is a type of hollow-based bullet designed by Claude-Étienne Minié, inventor of the French Minié rifle, for muzzle-loading rifled muskets. It was invented in 1847 and came to prominence in the Crimean War and the American Civil War, where it was found to inflict significantly more serious wounds than earlier round musket balls. Both the American Springfield Model 1861 and the British Pattern 1853 Enfield rifled muskets, the most common weapons used during the American Civil War, used the Minié ball. Rifling, the addition of spiral grooves inside a gun barrel, imparts a stabilizing spin to a projectile for better external ballistics, greatly increasing the effective range and accuracy of the gun. Before the introduction of the Minié ball, balls had to be rammed down the barrel, sometimes with a mallet, because gunpowder residue would foul a rifled bore after a relatively small number of shots, requiring frequent cleaning of the gun. McPher ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cannelure
A cannelure is a groove or channel around ammunition, either bullets or cartridge cases. The cannelure may be pressed into or cast with the bullet or case. Function In the Minié ball the purpose of the cannelure is to hold a lubricant. Cannelures for this purpose are commonly called "grease grooves" or "lubrication (lube) grooves" or just "grooves" by bullet casters (see the glossary of firearms technical terminology maintained by SAAMI). The lubricant reduces metal fouling by lead that is rubbed off the projectile and onto the bore by friction. It also reduces the rate of bore fouling by black powder residue. In modern bullets, such as the 7.62 illustrated here, the cannelure is pressed into the circumference of the bullet to provide a strong purchase for the mouth of the cartridge case when it is crimped onto that cannelure. This is done to prevent the bullet from moving either forward or backward in the case. While bullet setback can be a problem with any self-loading gun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Delvigne
Henri-Gustave Delvigne (April 10, 1800 in Hamburg – October 18, 1876 in Toulon) was a French soldier and inventor. He became a captain in the French infantry service, from which he resigned on the outbreak of the 1830 July Revolution. Delvigne revolutionized rifle technology and rendered it proper as a weapon. Chambered magazines In 1826 Delvigne invented a new method which greatly simplified the use of rifled guns, and created a rifle known by his name. The problem was that the black powder used at that time would quickly produce a thick layer residue of fouling. After only three or four shots, a typical muzzle-loading rifle could only be reloaded by using a mallet to force the bullet down the fouled barrel. Delvigne addressed this problem by producing a rifle chamber smaller than the bore, with which it was connected by a spherical surface equal in radius to the ball used. The powder was poured from the muzzle into the chamber, upon which the ball rested when dropped ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stem Rifle
Stem or STEM may refer to: Plant structures * Plant stem, a plant's aboveground axis, made of vascular tissue, off which leaves and flowers hang * Stipe (botany), a stalk to support some other structure * Stipe (mycology), the stem of a mushroom under the cap * Stem (vine), part of a grapevine * Trunk (botany), the woody stem of a tree Education * Science, technology, engineering, and mathematics (STEM), a broad term used in curricula and policy * STEM.org, an educational publisher and service * Stem, a multiple choice question lede (excluding the options) Language and writing * Word stem, the part of a word common to all its inflected variants ** Stemming, a process in natural language processing * Stem (typography), the main vertical stroke of a letter * Stem (music), a part of a written musical note Man-made objects * Stem (ship), the upright member mounted on the forward end of a vessel's keel, to which the strakes are attached * Stem (bicycle part), connects the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1809 Births
Eighteen or 18 may refer to: * 18 (number), the natural number following 17 and preceding 19 * one of the years 18 BC, AD 18, 1918, 2018 Film, television and entertainment * ''18'' (film), a 1993 Taiwanese experimental film based on the short story ''God's Dice'' * ''Eighteen'' (film), a 2005 Canadian dramatic feature film * 18 (British Board of Film Classification), a film rating in the United Kingdom, also used in Ireland by the Irish Film Classification Office * 18 (''Dragon Ball''), a character in the ''Dragon Ball'' franchise * "Eighteen", a 2006 episode of the animated television series ''12 oz. Mouse'' Music Albums * ''18'' (Moby album), 2002 * ''18'' (Nana Kitade album), 2005 * '' 18...'', 2009 debut album by G.E.M. Songs * "18" (5 Seconds of Summer song), from their 2014 eponymous debut album * "18" (One Direction song), from their 2014 studio album ''Four'' * "18", by Anarbor from their 2013 studio album '' Burnout'' * "I'm Eighteen", by Alice Cooper common ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
