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Gerb (pyrotechnic)
A gerb is a type of firework which produces a jet of sparks, usually lasting between 15 and 60 seconds. It is a thick-walled tube filled with pyrotechnic composition and possessing a choke, which is a narrowing in the tube. Gerbs are often referred to as 'fountains' ( spark fountain). Sometimes a small charge of black powder Gunpowder, also commonly known as black powder to distinguish it from modern smokeless powder, is the earliest known chemical explosive. It consists of a mixture of sulfur, carbon (in the form of charcoal) and potassium nitrate (saltpeter). Th ... is added to the bottom of a gerb to make it finish with a bang: this charge is known as the 'bounce'. These are commonly used at sporting events. Gerbs intended for use indoors near a proximate audience, such as at a rock concert, typically have shorter durations (from {{frac, 1, 8 to 30 seconds) and heights (4 to 50 feet). Gerbs are usually measured in terms of time and height. For example, a 4×4 burns fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gerb Schematic
GERB ( bg, ГЕРБ, translation=coat of arms, acronym for Citizens for European Development of Bulgaria) is a conservative, populist political party which was the ruling party of Bulgaria between 2009 and 2021. History GERB is headed by former Prime Minister of Bulgaria Boyko Borisov, the former mayor of Sofia, former member of the National Movement Simeon II and former personal guard of Todor Zhivkov in the 1990s. The establishment of the party followed the creation of a non-profit organization with the acronym (in Bulgarian) GERB — ''Citizens for European Development of Bulgaria'', earlier the same year. In early January 2007, and early February 2007, the party came second in public polls on party support with around 14%, trailing the Bulgarian Socialist Party which had around 25%. Its stated priorities are fighting crime and corruption, preserving family as the cornerstone of society and achieving energy independence. GERB won the 2009 European Parliament electi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Firework
Fireworks are a class of low explosive pyrotechnic devices used for aesthetic and entertainment purposes. They are most commonly used in fireworks displays (also called a fireworks show or pyrotechnics), combining a large number of devices in an outdoor setting. Such displays are the focal point of many cultural and religious celebrations. Fireworks take many forms to produce four primary effects: noise, light, smoke, and floating materials (confetti most notably). They may be designed to burn with colored flames and sparks including red, orange, yellow, green, blue, purple and silver. They are generally classified by where they perform, either 'ground' or 'aerial'. Aerial fireworks may have their own propulsion (skyrocket) or be shot into the air by a mortar ( aerial shell). Most fireworks consist of a paper or pasteboard tube or casing filled with the combustible material, often pyrotechnic stars. A number of these tubes or cases may be combined so as to make when kind ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ember
An ember, also called a hot coal, is a hot lump of smouldering solid fuel, typically glowing, composed of greatly heated wood, coal, or other carbon-based material. Embers (hot coals) can exist within, remain after, or sometimes precede, a fire. Embers are, in some cases, as hot as the fire which created them. They radiate a substantial amount of heat long after the fire has been extinguished, and if not taken care of properly can rekindle a fire that is thought to be completely extinguished and can pose a fire hazard. In order to avoid the danger of accidentally spreading a fire, many campers pour water on the embers or cover them in dirt. Alternatively, embers can be used to relight a fire after it has gone out without the need to rebuild the fire – in a conventional fireplace, a fire can easily be relit up to 12 hours after it goes out, provided that there is enough space for air to circulate between the embers and the introduced fuel. They are often used for cooking ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyrotechnic
Pyrotechnics is the science and craft of creating such things as fireworks, safety matches, oxygen candles, explosive bolts and other fasteners, parts of automotive airbags, as well as gas-pressure blasting in mining, quarrying, and demolition. This trade relies upon self-contained and self-sustained exothermic chemical reactions to make heat, light, gas, smoke and/or sound. The name comes from the Greek words ''pyr'' ("fire") and ''tekhnikos'' ("made by art"). People responsible for the safe storage, handling, and functioning of pyrotechnic devices are known as pyrotechnicians. Proximate pyrotechnics Explosions, flashes, smoke, flames, fireworks and other pyrotechnic-driven effects used in the entertainment industry are referred to as proximate pyrotechnics. Proximate refers to the pyrotechnic device's location relative to an audience. In the majority of jurisdictions, special training and licensing must be obtained from local authorities to legally prepare and use proximate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spark Fountain
Spark commonly refers to: * Spark (fire), a small glowing particle or ember * Electric spark, a form of electrical discharge Spark may also refer to: Places * Spark Point, a rocky point in the South Shetland Islands People * Spark (surname) * Jessica Morgan (born 1992; formerly known as Spark), female singer-songwriter from East London Companies and organisations * Spark, the last-mile delivery service for Walmart * Spark (architects), an international architectural firm * Spark (U.S. organization), a Trotskyist group * Spark Energy, a UK electricity and gas supplier * Spark Infrastructure, an investor in Australian infrastructure assets * Spark Networks SE, an online dating company * Spark New Zealand, a telecommunications company * Spark Racing Technology, a French motorsport manufacturer specializing in electric racecars * Spark Unlimited, a computer game developer Computer science * Adobe Spark, a suite of media applications developed by Adobe Systems * Apache Spark, a clu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Black Powder
Gunpowder, also commonly known as black powder to distinguish it from modern smokeless powder, is the earliest known chemical explosive. It consists of a mixture of sulfur, carbon (in the form of charcoal) and potassium nitrate (saltpeter). The sulfur and carbon act as fuels while the saltpeter is an oxidizer. Gunpowder has been widely used as a propellant in firearms, artillery, rocketry, and pyrotechnics, including use as a blasting agent for explosives in quarrying, mining, building pipelines and road building. Gunpowder is classified as a low explosive because of its relatively slow decomposition rate and consequently low brisance. Low explosives deflagrate (i.e., burn at subsonic speeds), whereas high explosives detonate, producing a supersonic shockwave. Ignition of gunpowder packed behind a projectile generates enough pressure to force the shot from the muzzle at high speed, but usually not enough force to rupture the gun barrel. It thus makes a good propellant but is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Last Grain Race
''The Last Grain Race'' is a 1956 book by Eric Newby, a travel writer, about his time spent on the four-masted steel barque ''Moshulu'' during the vessel's last voyage in the Australian grain trade. Background to the book In 1938 the 18-year-old Newby shipped aboard the four-masted barque ''Moshulu'' as an apprentice. His outbound passage from Europe to Australia was via the Cape of Good Hope. His return was around Cape Horn. The ''Moshulu'' was at the time one of the largest sailing ships still transporting grain. While 1939 was arguably the last Grain race worthy of the name, as it was followed by World War II and the consequent near-total interruption of commercial shipping, commercial sailing ships still sailed the route after the war for two more years in 1948 and 1949.pamir.chez-alice: ''The grain r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
