|
NACA Duct
A NACA duct, also sometimes called a NACA scoop or NACA inlet, is a common form of low- drag air inlet design, originally developed by the U.S. National Advisory Committee for Aeronautics (NACA), the precursor to NASA, in 1945. Design Prior submerged inlet experiments showed poor pressure recovery due to the slow-moving boundary layer entering the inlet. The NACA design is believed to work because the combination of the gentle ramp angle and the curvature profile of the walls creates counter-rotating vortices which deflect the boundary layer away from the inlet and draws in the faster moving air, while avoiding the form drag and flow separation that can occur with protruding scoop designs. Aircraft applications When properly implemented, a NACA duct allows air to flow into an internal duct, often for cooling purposes, with a minimal disturbance to the flow. The design was originally called a submerged inlet, since it consists of a shallow ramp with curved walls recessed in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sports Car
A sports car is a type of automobile that is designed with an emphasis on dynamic performance, such as Automobile handling, handling, acceleration, top speed, the thrill of driving, and Auto racing, racing capability. Sports cars originated in Europe in the early 1910s and are currently produced by many manufacturers around the world. Definition Definitions of sports cars often relate to how the car design is optimised for dynamic performance, without any specific minimum requirements; both a Triumph Spitfire and Ferrari 488 Pista can be considered sports cars, despite vastly different levels of performance. Broader definitions of sports cars include cars "in which performance takes precedence over carrying capacity", or that emphasise the "thrill of driving" or are marketed "using the excitement of speed and the glamour of the (race)track" However, other people have more specific definitions, such as "must be a two-seater or a 2+2 seater" or a car with two seats only. In the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NACA Cowling
The NACA cowling is a type of aerodynamic Aircraft fairing, fairing used to streamliner, streamline radial engines installed on airplanes. It was developed by Fred Weick of the National Advisory Committee for Aeronautics (NACA) in 1927. It was a major advancement in aerodynamic drag reduction, and paid for its development and installation costs many times over due to the gains in fuel efficiency that it enabled. NACA won the 1929 Collier Trophy for its development. History and design The NACA cowling enhanced speed through drag reduction while improving engine cooling. The cowling consists of a symmetric, circular airfoil that is wrapped around the engine. In a normal planar airfoil, like a wing, the difference in airspeeds, and their associated changes in pressure, on the top and bottom surfaces, enhances lift. In the case of the NACA cowl, the ring-shaped airfoil is positioned so this lift effect is forward. This thrust does not fully counter the drag of the cowl but greatly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NACA Airfoil
The NACA airfoil series is a set of standardized airfoil shapes developed by this agency, which became widely used in the design of aircraft wings. Origins NACA initially developed the numbered airfoil system which was further refined by the United States Air Force at Langley Research Center. According to the NASA website: Four-digit series The NACA four-digit wing sections define the profile by: # First digit describing maximum Camber (aerodynamics), camber as percentage of the Chord (aircraft), chord. # Second digit describing the distance of maximum camber from the airfoil leading edge in tenths of the chord. # Last two digits describing maximum thickness of the airfoil as percent of the chord. For example, the NACA 2412 airfoil has a maximum camber of 2% located 40% (0.4 chords) from the leading edge with a maximum thickness of 12% of the chord. The NACA 0015 airfoil is symmetrical, the 00 indicating that it has no camber. The 15 indicates that the airfoil has a 15% thick ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ducati 916
The Ducati 916 is a fully faired sport bike made by Ducati from 1994 to 1998. Featuring a fuel injected, 4-valve, desmo, liquid-cooled, 90° V-twin engine in a trellis frame with a single-sided swingarm and USD forks, the 916 is frequently cited as one of the most beautiful motorcycles ever. Design and development The first development of the 916 model family can be traced back to the development of the four-valve Ducati engine, the Desmoquattro, through the development and racing of the earlier Pantah models, to the road-going 851 and 888 models. The chief designer of Ducati motorcycles since the 1970s was Fabio Taglioni (1920–2001), who introduced the Pantah in 1979. The engine was updated in the 1990s in the SuperSport (SS) series and all modern Ducati engines are derivatives of the Pantah, which used its camshafts to both open and close the engine's valves, eliminating the usual valve closing springs, a system called 'desmodromic'. Taglioni, did not, however, have ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Honda VFR750F
The Honda VFR750F is a motorcycle manufactured by Japanese automobile manufacturer Honda from 1986 to 1997. The motorcycle is a very sporty sport tourer, and is powered by a V4 engine developed from the earlier VF750F models. The VFR was announced in 1986, after an initial press viewing at the 1985 Bol d'Or. The previous VF700/750F models revealed Honda's new devotion to the V4 engine format, but the engines had proved unreliable because of the infamous "chocolate cams". Honda, having suffered a dent in its proven reputation for reliability, felt that the successor should be over-engineered to restore that damaged reputation; the resulting VFR was an exceptional and highly -regarded motorcycle. Compared to its VF750F predecessor, the VFR has significant improvements: * greater power output (104 hp up from 83 hp) *lighter weight (20 kg less), * a lower center of gravity * a wider front tire * shorter wheelbase (15mm) * six gear ratios * gear-driven cams. Eng ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porsche 911 GT2
The Porsche 911 GT2 is a high-performance, track-focused sports car built by the German automobile manufacturer Porsche from 1993 to 2009, and then since 2010 as the GT2 RS. It is based on the Porsche 911 Turbo, 911 Turbo, and uses a similar twin-turbocharged engine, but features numerous upgrades, including engine enhancements, larger brakes, and stiffer suspension calibration. The GT2 is significantly lighter than the Turbo due to its use of rear-wheel-drive instead of an all-wheel-drive system and the reduction or removal of interior components. As a result, the GT2 (now GT2 RS) is the most expensive and fastest model among the Porsche 911, 911 lineup. __TOC__ 993 generation The Porsche 993, 993 GT2 was initially built in order to meet homologation (motorsport), homologation requirements for FIA GT2 European Championship, GT2 class racing. Because the cars were built to meet the GT2 class regulations, the road cars were named accordingly (but badged as the 911 GT). The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nissan S130
The Nissan S130 is a sports coupé produced by Nissan in Japan from 1978 until 1983. It was sold as the Datsun 280ZX, Nissan Fairlady Z and Nissan Fairlady 280Z, depending on the market. In Japan, it was exclusive to Nissan Bluebird Store locations. It was the second generation Z-car, replacing the Nissan Fairlady Z (S30) in late 1978. The 280ZX was the first time the "by Nissan" subscript was badged alongside the Datsun logo, along with Nissan trucks. The 280ZX was ''Motor Trend's'' import car of the year for 1979. The 280ZX was replaced by the Nissan 300ZX in 1984. Design goals The 280ZX was a complete redesign, retaining only the L28 inline-six engine and other driveline components from the 280Z. Both two-seat and four-seat (2+2) designs were offered. Compared to the more overtly sporting earlier models, the 280ZX was a much softer, heavier car, with less focus on driving and more on driver comfort and refinement. Softer suspension, better sound insulation, more comfortable s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maserati Biturbo
The Maserati Biturbo is a family of executive grand tourers produced by Italian automobile manufacturer Maserati between 1981 and 1994. The original Biturbo was a two-door, four-seater notchback coupé (of somewhat smaller dimensions than the BMW 3 Series of the time) featuring, as the name implies, a two-litre V6 engine with two turbochargers and a luxurious interior. The car was designed by Pierangelo Andreani, Chief of Centro Stile Maserati up to 1981, somewhat influenced by the design of the then recent Quattroporte III (penned by Italdesign Giugiaro). All Maserati models introduced from the Biturbo's inception in 1981, until 1997, were based on variants of the original Biturbo architecture, including the later grand tourers like the Shamal and Ghibli II, as well as the 1994 fourth generation Quattroporte, which used an evolved and slightly stretched (to 2.65 m / 104.3 in wheelbase) Biturbo Saloon platform. The Barchetta, while of a different layout entir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porsche 924
The Porsche 924 is a sports car produced by Porsche in Neckarsulm, Germany, from 1976 until 1988. A two-door, 2+2 coupé, the 924 replaced the 912E and 914 as the company's entry-level model. Although the 928 was designed first, the 924 was the first production road-going Porsche to use water cooling and a front-engine, rear-wheel-drive layout. It was also the first Porsche to be offered with a conventional fully automatic transmission. Like the 914, the 924 began as a joint venture with Volkswagen (VW). Although VW canceled plans to sell a version under its own nameplate, opting to market the independently-developed Scirocco instead, the 924 was assembled in a VW-operated plant and initially used a VW engine. The 924 made its public debut in November 1975 and a turbocharged version was introduced in 1978. In response to increasing competition, Porsche introduced an upgraded version with a new Porsche-built engine as the 944, which replaced the 924 in the U.S. in 1983. In 198 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pontiac GTO
The Pontiac GTO is a front-engine, rear-drive, two-door, and four-passenger automobile manufactured and marketed by the Pontiac (automobile), Pontiac division of General Motors over four generations from 1963 until 1974 in the United States — with a fifth generation made by GM's Australian subsidiary, Holden, for the 2004 through 2006 model years. The first generation of the GTO is credited with popularizing the muscle car market segment in the 1960s. Some consider the Pontiac GTO to have started the trend with all four domestic automakers offering a variety of competing models. For the 1964 and 1965 model years, the GTO was an optional package on the intermediate-sized Pontiac LeMans. The 1964 GTO vehicle identification number (VIN) started with 22, while the 1965 GTO VIN began with 237. The GTO was designated as a separate Pontiac model from 1966 through 1971 (VIN 242...). It became an optional package again for the 1972 and 1973 intermediate LeMans. For 1974, the GTO ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ford Mustang
The Ford Mustang is a series of American Car, automobiles manufactured by Ford Motor Company, Ford. In continuous production since 1964, the Mustang is currently the longest-produced Ford car nameplate. Currently in its Ford Mustang (seventh generation), seventh generation, it is the fifth-best selling Ford car nameplate. The namesake of the "pony car" automobile segment, the Mustang was developed as a highly styled line of sporty coupes and convertibles derived from existing model lines, initially distinguished by "long hood, short deck" proportions. Originally predicted to sell 100,000 vehicles yearly, the 1965 Mustang became the most successful vehicle launch since the Ford Model A (1927–31), 1927 Model A. Introduced on April 17, 1964 (16 days after the Plymouth Barracuda), over 400,000 units were sold in its first year; the one-millionth Mustang was sold within two years of its launch. In August 2018, Ford produced the 10-millionth Mustang; matching the first 1965 Musta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
