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Topic Review
Straight-Six Engine
The straight-six engine (also referred to as an inline-six engine; abbreviated I6 or L6) is an internal combustion engine, with six cylinders mounted in a straight line along the crankcase with all the pistons driving a common crankshaft (straight engine). The bank of cylinders may be oriented at any angle, and where the bank is inclined away from the vertical, the engine is sometimes called a slant-six (although this is also a Chrysler-specific design). The straight-six layout is the simplest engine layout that possesses both primary and secondary mechanical engine balance, resulting in much less vibration than engines with fewer cylinders.
  • 6.8K
  • 15 Nov 2022
Topic Review
List of ASTM International Standards (D)
This is a list of ASTM International standards for "Materials for Specific Applications".
  • 5.9K
  • 11 Oct 2022
Topic Review
Shenyang J-31
The Shenyang J-31 (or "FC-31 fifth Generation Multi-Purpose light Fighter") also known as the "Gyrfalcon" (鹘鹰), or "Falcon Hawk" by some military enthusiasts, is a twin-engine, mid-size fifth-generation jet fighter currently under development by Shenyang Aircraft Corporation. The fighter has also been referred to as the "F-60" or "J-21 Snowy Owl" (雪鸮) in some media reports. Its official name is Shenyang FC-31; J-xx nomenclatures in the Chinese military are reserved to programs launched and financed by the army, while this plane was developed by a state-owned company.
  • 5.9K
  • 10 Nov 2022
Topic Review
DeLorean DMC-12
The DeLorean DMC-12 (commonly referred to simply as "the DeLorean", as it was the only model ever produced by the company) is a sports car originally manufactured by John DeLorean's DeLorean Motor Company for the American market from 1981 to 1983. The car features gull-wing doors and an innovative fiberglass body structure with a steel backbone chassis, along with external brushed stainless-steel body panels. It became widely known and iconic for its appearance, and because a modified DMC-12 was immortalized as the DeLorean time machine in the Back to the Future media franchise. The first prototype appeared in October 1976. Production officially began in 1981 in Dunmurry, a suburb of southwest Belfast, Northern Ireland, where the first DMC-12 rolled off the production line on January 21. Over the course of production, several features of the car were changed, such as the hood style, wheels, and interior. About 9,000 DMC-12s were made before production halted in early 1983. The DMC-12 was the only model produced by the company, which was later liquidated as the US car market went through its largest slump since the 1930s. In 2007, about 6,500 DeLorean Motor cars were thought to still exist. In 1995, Stephen Wynne, a British entrepreneur from Liverpool, created a separate company based in Texas using the "DeLorean Motor Company" name. Wynne acquired the trademark on the stylized "DMC" logo shortly thereafter, along with the remaining parts inventory of the original DeLorean Motor Company. The company builds new cars at its suburban Humble, Texas location from new old stock (NOS) parts, original equipment manufacturer (OEM), and reproduction parts on a "made to order" basis using existing vehicle identification number (VIN) plates. On January 27, 2016, DMC in Texas announced that it planned to build about 300–325 replica 1982 DMC-12 cars, each projected to cost just under US$100,000.
  • 5.7K
  • 01 Dec 2022
Topic Review
US Airways Livery
US Airways' aircraft livery has varied both under the US Airways and USAir name. In general the Express and Shuttle divisions have had liveries that closely parallel the company-wide livery at the time. The US Airways livery has been replaced with the new American Airlines livery, in accordance with their merger.
  • 5.6K
  • 16 Nov 2022
Topic Review
GAZ Tigr
The GAZ Tigr (Russian: Тигр and English: Tiger) is a Russia n 4x4, multipurpose, all-terrain infantry mobility vehicle manufactured by GAZ, first delivered to the Russian Army in 2006. Primarily used by the Russian Federation's armed forces, it is also used by numerous other countries.
  • 5.6K
  • 26 Oct 2022
Topic Review
List of DCS Modules
The below list includes all standalone products (commonly known as "modules") in Digital Combat Simulator, an air combat video game developed by Russian developer Eagle Dynamics. Fighter aircraft, helicopters and trainer aircraft modules can be flown by human players and artificial intelligence. Aircraft carriers, tanker aircraft and airborne early warning and control aircraft cannot be operated by human players.
  • 5.6K
  • 14 Nov 2022
Topic Review
Mitsubishi Challenger
The Mitsubishi Challenger is a mid-size SUV produced by the Japanese manufacturer Mitsubishi Motors since 1996, spanning over three generations. Since 2015, for the third generation model, Mitsubishi has no longer used the Challenger name, but using the Pajero Sport/Montero Sport/Shogun Sport name instead.
  • 5.6K
  • 10 Oct 2022
Topic Review
SSC Aero
The SSC Ultimate Aero is a mid-engined sports car that was produced by SSC North America (formerly known as Shelby SuperCars) from 2004 until 2013. The SSC Ultimate Aero held the world production car speed record title, according to the Guinness World Records, from 2007 (when it was officially timed at 410 km/h) until the introduction of the Bugatti Veyron Super Sport in 2010. In April 2013, the Guinness World Records temporarily disqualified the Veyron's record time for a period of five days due to concerns about electronic speed limiting changing the function of the car, but after investigation reinstated the Veyron as the record holder. The SSC Ultimate Aero was not sold with electronic driver aids such as an anti-lock braking system or traction control system, as according to Jerod Shelby (no relations to Carroll Shelby), "Early design philosophy on the car was to make it a driver's car. I wanted a car that you not only throttled with your right foot but at times you could steer with your right foot and a sensor."
  • 5.6K
  • 04 Nov 2022
Topic Review
Slope Stability Analysis
Slope stability analysis is performed to assess the safe design of a human-made or natural slopes (e.g. embankments, road cuts, open-pit mining, excavations, landfills etc.) and the equilibrium conditions. Slope stability is the resistance of inclined surface to failure by sliding or collapsing. The main objectives of slope stability analysis are finding endangered areas, investigation of potential failure mechanisms, determination of the slope sensitivity to different triggering mechanisms, designing of optimal slopes with regard to safety, reliability and economics, designing possible remedial measures, e.g. barriers and stabilization. Successful design of the slope requires geological information and site characteristics, e.g. properties of soil/rock mass, slope geometry, groundwater conditions, alternation of materials by faulting, joint or discontinuity systems, movements and tension in joints, earthquake activity etc. The presence of water has a detrimental effect on slope stability. Water pressure acting in the pore spaces, fractures or other discontinuities in the materials that make up the pit slope will reduce the strength of those materials. Choice of correct analysis technique depends on both site conditions and the potential mode of failure, with careful consideration being given to the varying strengths, weaknesses and limitations inherent in each methodology. Before the computer age stability analysis was performed graphically or by using a hand-held calculator. Today engineers have a lot of possibilities to use analysis software, ranges from simple limit equilibrium techniques through to computational limit analysis approaches (e.g. Finite element limit analysis, Discontinuity layout optimization) to complex and sophisticated numerical solutions (finite-/distinct-element codes). The engineer must fully understand limitations of each technique. For example, limit equilibrium is most commonly used and simple solution method, but it can become inadequate if the slope fails by complex mechanisms (e.g. internal deformation and brittle fracture, progressive creep, liquefaction of weaker soil layers, etc.). In these cases more sophisticated numerical modelling techniques should be utilised. Also, even for very simple slopes, the results obtained with typical limit equilibrium methods currently in use (Bishop, Spencer, etc.) may differ considerably. In addition, the use of the risk assessment concept is increasing today. Risk assessment is concerned with both the consequence of slope failure and the probability of failure (both require an understanding of the failure mechanism). Within the last decade (2003) Slope Stability Radar has been developed to remotely scan a rock slope to monitor the spatial deformation of the face. Small movements of a rough wall can be detected with sub-millimeter accuracy by using interferometry techniques.
  • 5.2K
  • 19 Oct 2022
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