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Air Cycle Machine
An air cycle machine (ACM) is the refrigeration unit of the environmental control system (ECS) used in pressurized gas turbine-powered aircraft. Normally an aircraft has two or three of these ACM. Each ACM and its components are often referred as an ''air conditioning pack''. The air cycle cooling process uses air instead of a phase changing material such as Freon in the gas cycle. No condensation or evaporation of a refrigerant is involved, and the cooled air output from the process is used directly for cabin ventilation or for cooling electronic equipment. History Air cycle machines were first developed in the 19th century for providing chilling on ships. The technique is a reverse Brayton cycle (the thermodynamic cycle of a gas turbine engine) and is also known as a Bell Coleman cycle or "Air-Standard Refrigeration Cycle". Technical details The usual compression, cooling and expansion seen in any refrigeration cycle is accomplished in the ACM by a centrifugal compressor, tw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Environmental Control System
In aeronautics, an environmental control system (ECS) of an aircraft is an essential component which provides air supply, Air conditioning, thermal control and cabin pressurization for the Aircrew, crew and passengers. Additional functions include the Thermal management (electronics), cooling of avionics, smoke detection, and Fire suppression system, fire suppression. Overview The systems described below are specific to current production Boeing Commercial Airplanes, Boeing airliners, although the details are essentially identical for passenger jets from Airbus and other companies. An exception was Concorde which had a supplementary air supply system fitted due to the higher altitudes at which it flew, and also the slightly higher cabin pressure it employed. Air supply On jetliners, air is supplied to the ECS by being bleed air, bled from a Gas compressor, compressor stage of each gas turbine engine, upstream of the combustor. The temperature and pressure of this bleed air ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyclonic Separation
Cyclonic separation is a method of removing particulates from an air, gas or liquid stream, without the use of filters, through vortex separation. When removing particulate matter from liquid, a hydrocyclone is used; while from gas, a gas cyclone is used. Rotational effects and gravity are used to separate mixtures of solids and fluids. The method can also be used to separate fine droplets of liquid from a gaseous stream. A high speed rotating (air)flow is established within a cylindrical or conical container called a cyclone. Air flows in a helical pattern, beginning at the top (wide end) of the cyclone and ending at the bottom (narrow) end before exiting the cyclone in a straight stream through the center of the cyclone and out the top. Larger (denser) particles in the rotating stream have too much inertia to follow the tight curve of the stream, and thus strike the outside wall, then fall to the bottom of the cyclone where they can be removed. In a conical system, as the ro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Daily Kos
Daily Kos ( ) is a group blog and internet forum focused on the U.S. Democratic Party and liberal American politics. The site includes glossaries and other content. It is sometimes considered an example of "netroots" activism. Daily Kos was founded in 2002 by Markos Moulitsas and takes the name ''Kos'' from the last syllable of his first name, his nickname while in the military. Organization overview Funding According to Daily Kos, its finances are sustained through lead generation, sponsored content, fundraising, and donations from readers and supporters who have signed up to receive joint petition emails from Daily Kos. During the 2020 COVID-19 pandemic, the Kos Media received between $1 million and $2 million in federally-backed small business loans from Newtek Small Business Finance as part of the Paycheck Protection Program. The organization said it would help them retain 86 employees. Viewership and reception As of September 2014, Daily Kos has had an average we ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aerotoxic Syndrome
Aerotoxic syndrome relates to ill-health effects that are claimed to be caused by breathing contaminated airliner cabin air. This condition is not an established medical diagnosis. Potential sources of contamination Modern jetliners have environmental control systems (ECS) that manage the flow of cabin air. Outside air enters the engines and is compressed in the forward section of the engine, prior to the combustion section, ensuring no combustion products can enter the cabin. A portion of that compressed bleed air is used to pressurize the cabin. The ECS then recirculates some of that cabin air through HEPA filters, while the rest is directed to outflow valves, ensuring there is a constant supply of fresh, clean air coming into the cabin pressurization system at all times. Jet engines require synthetic oils for lubrication. These oils contain ingredients such as tricresyl phosphate (TCP or TOCP), an organophosphate, which can be toxic to humans but only in quantities much la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Refrigeration
The term refrigeration refers to the process of removing heat from an enclosed space or substance for the purpose of lowering the temperature.International Dictionary of Refrigeration, http://dictionary.iifiir.org/search.phpASHRAE Terminology, https://www.ashrae.org/technical-resources/free-resources/ashrae-terminology Refrigeration can be considered an artificial, or human-made, cooling method. Refrigeration refers to the process by which energy, in the form of heat, is removed from a low-temperature medium and transferred to a high-temperature medium. This work of energy transfer is traditionally driven by mechanical means, but can also be driven by heat, magnetism, electricity, laser, or other means. Refrigeration has many applications, including household refrigerators, industrial freezers, cryogenics, and air conditioning. Heat pumps may use the heat output of the refrigeration process, and also may be designed to be reversible, but are otherwise similar to air conditioning ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lockheed Martin
The Lockheed Martin Corporation is an American aerospace, arms, defense, information security, and technology corporation with worldwide interests. It was formed by the merger of Lockheed Corporation with Martin Marietta in March 1995. It is headquartered in North Bethesda, Maryland, in the Washington, D.C. area. Lockheed Martin employs approximately 115,000 employees worldwide, including about 60,000 engineers and scientists as of January 2022. Lockheed Martin is one of the largest companies in the aerospace, military support, security, and technologies industry. It is the world's largest defense contractor by revenue for fiscal year 2014.POC Top 20 Defence Contractors of 2014 . Retrieved: July 2015 In 2013, 78% of Lockheed Martin's revenues came from military sales; [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bombardier Inc
Bombardier Inc. () is a Canadian business jet manufacturer. It was also formerly a manufacturer of commercial jets, public transport vehicles, trains, and recreational vehicles, with the last being spun-off as Bombardier Recreational Products. The company originally produced Ski-doo snowmobiles, over time expanding into the aviation, light and heavy rail, and public transit businesses. Bombardier manufactures several series of corporate jets, Global 7500, Global Express, Challenger 650 and Challenger 3500. History Bombardier Recreational Products In January 1934, a blizzard prevented Joseph-Armand Bombardier from reaching the nearest hospital in time to save his two-year-old son, Yvon, who died from appendicitis complicated by peritonitis. Bombardier was a mechanic who dreamed of building a vehicle that could "float on snow". In 1935, in a repair shop in Valcourt, Quebec, he designed and produced the first snowmobile using a drive system he developed that revolutio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Embraer
Embraer S.A. () is a Brazilian multinational aerospace manufacturer that produces commercial, military, executive and agricultural aircraft, and provides aeronautical services. It was founded in 1969 in São José dos Campos, São Paulo, where its headquarters are located. The company is the third largest producer of civil aircraft, after Boeing and Airbus. History Seeking to develop a domestic aircraft industry, the Brazilian government under Getúlio Vargas' Estado Novo made several investments in the aerospace industry during the 1940s and 1950s. However, it was not until 1969, following the rise to power of a military junta in the 1964 Brazilian coup d'état, that Empresa Brasileira de Aeronáutica (Embraer) was created as a government-owned corporation.. Its first president, Ozires Silva, was a government appointee, and the company initially only produced a turboprop passenger aircraft, the Embraer EMB 110 Bandeirante. Early growth The Brazilian government contributed to E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Airbus
Airbus SE (; ; ; ) is a European Multinational corporation, multinational aerospace corporation. Airbus designs, manufactures and sells civil and military aerospace manufacturer, aerospace products worldwide and manufactures aircraft throughout the world. The company has three divisions: ''Airbus Commercial Aircraft, Commercial Aircraft (Airbus S.A.S.)'', ''Airbus Defence and Space, Defence and Space'', and ''Airbus Helicopters, Helicopters'', the third being the largest in its industry in terms of revenues and turbine helicopter deliveries. As of 2019, Airbus is the world's largest airliner manufacturer. The company's main civil aeroplane business is conducted through the French company Airbus S.A.S., based in Blagnac, a suburb of Toulouse, with production and manufacturing facilities mostly in the European Union and the United Kingdom but also in China, the United States and Canada. Final assembly production is based in Toulouse, France; Hamburg, Germany; Seville, Spain; Tia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boeing
The Boeing Company () is an American multinational corporation that designs, manufactures, and sells airplanes, rotorcraft, rockets, satellites, telecommunications equipment, and missiles worldwide. The company also provides leasing and product support services. Boeing is among the largest global aerospace manufacturers; it is the third-largest defense contractor in the world based on 2020 revenue, and is the largest exporter in the United States by dollar value. Boeing stock is included in the Dow Jones Industrial Average. Boeing is incorporated in Delaware. Boeing was founded by William Boeing in Seattle, Washington, on July 15, 1916. The present corporation is the result of the merger of Boeing with McDonnell Douglas on August 1, 1997. Then chairman and CEO of Boeing, Philip M. Condit, assumed those roles in the combined company, while Harry Stonecipher, former CEO of McDonnell Douglas, became president and COO. The Boeing Company's corporate headquarters is in Chicago, Illi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PBS Velká Bíteš
Prvni brnenska strojirna Velka Bites, a. s. ("First Brno Engineering Plant", known as PBS VB) is a Czech engineering and manufacturing company. It focuses mainly on the development, testing, and production of devices for the aircraft industry. Together with PBS Energo, a.s.; PBS Brno, a.s. and PBS Aerospace Inc., PBS VB is a member of PBS GROUP, a.s. History The history of PBS VB has been closely related to the company PBS Brno, originally founded in 1814 by Jan Reiff, who established a textile mill near Brno. As the company was growing, new facilities were built. PBS VB was established in 1950 in Velká Bíteš, Czech Republic to support industrial development of the region. The first products produced in PBS VB were hammer drills and parts for mining and metallurgical pneumatic tools. In 1951 a production of fittings started. Modernisation and extension of the production capacities connected with an investment casting hall construction were finished in 1970. At the same t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Collins Aerospace
Collins Aerospace is an American technology corporation that is one of the world's largest suppliers of aerospace and defense products. Headquartered in Charlotte, North Carolina, it is a subsidiary of Raytheon Technologies. History On November 26, 2018, United Technologies announced the completion of its Rockwell Collins acquisition, after which it merged its newly acquired business with UTC Aerospace Systems to form Collins Aerospace. This acquisition controversially lead to multiple class action lawsuits being filed against the company alleging that the executives deliberately mislead its shareholders on the nature of the acquisition. The new company reported $26 billion of combined sales in 2019 and is composed of 68,000 employees. In 2020 United Technologies merged with Raytheon Company to form Raytheon Technologies. Products Collins Aerospace is engaged in designing, manufacturing and servicing systems and components for commercial aviation, business aviation, mili ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
