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Vortex Generator
A vortex generator (VG) is an aerodynamic device, consisting of a small wikt:vane, vane usually attached to a lifting surface (or airfoil, such as an aircraft, aircraft wing) or a rotor blade of a wind turbine.Wind Turbine Vortex Generators UpWind Solutions. VGs may also be attached to some part of an aerodynamic vehicle such as an aircraft fuselage or a car. When the airfoil or the body is in motion relative to the air, the VG creates a vortex,Peppler, I.L.: ''From The Ground Up'', page 23. Aviation Publishers Co. Limited, Ottawa Ontario, Twenty Seventh Revised Edition, 1996. which, by removing some part of the slow-moving boundary layer in contact with the airfoil surface, delays local flow separation and Sta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rudder
A rudder is a primary control surface used to steer a ship, boat, submarine, hovercraft, airship, or other vehicle that moves through a fluid medium (usually air or water). On an airplane, the rudder is used primarily to counter adverse yaw and p-factor and is not the primary control used to turn the airplane. A rudder operates by redirecting the fluid past the hull or fuselage, thus imparting a turning or yawing motion to the craft. In basic form, a rudder is a flat plane or sheet of material attached with hinges to the craft's stern, tail, or afterend. Often rudders are shaped to minimize hydrodynamic or aerodynamic drag. On simple watercraft, a tiller—essentially, a stick or pole acting as a lever arm—may be attached to the top of the rudder to allow it to be turned by a helmsman. In larger vessels, cables, pushrods, or hydraulics may link rudders to steering wheels. In typical aircraft, the rudder is operated by pedals via mechanical linkages or hydraulics. H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
STOL
A short takeoff and landing (STOL) aircraft is a fixed-wing aircraft that can takeoff/land on short runways. Many STOL-designed aircraft can operate on airstrips with harsh conditions (such as high altitude or ice). STOL aircraft, including those used in scheduled passenger airline operations, can be operated from STOLport airfields that feature short runways. Design STOL aircraft come in configurations such as bush planes, autogyros, and Conventional landing gear, taildraggers, and those such as the de Havilland Canada Dash-7 that are designed for use on conventional airstrips. The PAC P-750 XSTOL, the Daher Kodiak, the de Havilland Canada DHC-6 Twin Otter and the Wren 460 have STOL capability, needing a short ground roll to get airborne, but are capable of a near-zero ground roll when landing. For any plane, the required runway length is a function of the square of the stall speed (minimum flying speed), and much design effort is spent on minimizing this number. For take ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gloster Javelin
The Gloster Javelin is a twin-engined all-weather interceptor aircraft designed and produced by the Gloster Aircraft Company. It was operated by the Royal Air Force from the mid-1950s until the late 1960s and was the final aircraft design to bear the Gloster name. The Javelin was designed in response to specification F.44/46 during the late 1940s and early 1950s as high-performance night fighter capable of all-weather operations. In terms of its basic configuration, it was a T-tailed delta-wing aircraft powered by a pair of Armstrong Siddeley Sapphire turbojet engines. Following a protracted development period, the Javelin was introduced to squadron service during 1956. Throughout its service life, the aircraft received several upgrades, which were typically focused upon its engines, radar and weapons, including support for the De Havilland Firestreak air-to-air missile. The Javelin was succeeded in the interceptor role by the English Electric Lightning, a supersonic air ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blackburn Buccaneer
The Blackburn Buccaneer is a British aircraft carrier, carrier-capable attack aircraft designed in the 1950s for the Royal Navy (RN). Designed and initially produced by Blackburn Aircraft at Brough Aerodrome, Brough, it was later officially known as the Hawker Siddeley Buccaneer when Blackburn became a part of the Hawker Siddeley, Hawker Siddeley Group, but this name is rarely used. The Buccaneer was originally designed in response to the Soviet Union introducing the Sverdlov-class cruiser, ''Sverdlov'' class of light cruisers. Instead of building a new class of its own cruisers, the Royal Navy decided that it could address the threat posed via low-level attack runs performed by Buccaneers, low enough to exploit the ship's radar horizon to minimise the opportunity for being fired upon. The Buccaneer could attack using nuclear weapons or conventional munitions. During its service life, it would be modified to carry anti-ship missiles, allowing it to attack vessels from a stand- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hawker Siddeley Harrier
The Hawker Siddeley Harrier is a British jet-powered attack aircraft designed and produced by the British aerospace company Hawker Siddeley. It was the first operational ground attack and reconnaissance aircraft with vertical/short takeoff and landing (V/STOL) capabilities and the only truly successful V/STOL design of its era. It was the first of the Harrier series of aircraft, being developed directly from the Hawker Siddeley Kestrel prototype aircraft following the cancellation of a more advanced supersonic aircraft, the Hawker Siddeley P.1154. In the mid 1960s, the ''Harrier GR.1'' and ''GR.3'' variants were ordered by the British government for the Royal Air Force (RAF). The Harrier GR.1 made its first flight on 28 December 1967, and entered RAF service in April 1969. During the 1970s, the United States opted to procure the aircraft as the ''AV-8A''; it was operated by the US Marine Corps (USMC). Introduced to service amid the Cold War, the RAF positioned the bu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shock-stall
A shock stall is a stall created when the airflow over an aircraft's wings is disturbed by shock waves formed when flying at or above the aircraft's drag divergence Mach number. Shock stall may cause control problem during speed transition (transonic to supersonic). Thin supercritical wing section and swept-back wing can postpone shock stall to higher speed. A stall is the decrease in lift to a value below the weight, and the associated increase in drag upon the separation of the boundary layer (in this case behind the shock wave In physics, a shock wave (also spelled shockwave), or shock, is a type of propagating disturbance that moves faster than the local speed of sound in the medium. Like an ordinary wave, a shock wave carries energy and can propagate through a me ...). A shock stall occurs, when the lift coefficient as function of the Mach Number reaches its maximum value. References Aerodynamics {{aviation-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Symphony SA-160
The Symphony SA-160 is a Canadian Aviation Regulations, CAR 523 certified, two-seat, single-engine, high-wing airplane that was manufactured by Symphony Aircraft Industries in Trois-Rivières, Quebec, Trois-Rivières, Quebec, Canada in the mid-2000s.Hunt, Adam: ''A brief history of Symphony Aircraft'', COPA Flight December 2005 The SA-160 is a development of the Stoddard-Hamilton Aircraft, Stoddard-Hamilton Glastar amateur-built kit aircraft and is externally similar to that design.Hunt, Adam: ''Flying the Symphony 160'', COPA Flight December 2005 Development The SA-160 was developed from the Glastar by incorporating many significant changes to the basic design with the aim of simplifying construction and complying with certification requirements. The redesign work was completed by the engineering staff of Ostmecklenburgische Flugzeugbau (OMF Aircraft), (East Mecklenburg Aircraft Works Limited) of Neubrandenburg, Mecklenburg-Vorpommern, Germany between 1998 and 2000. The a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ST Aerospace A-4SU Super Skyhawk
The ST Aerospace A-4SU Super Skyhawk is a major upgrade project of the Douglas A-4S Skyhawk attack aircraft undertaken by Singapore Aircraft Industries (SAI, now ST Aerospace) in the 1980s. It was used exclusively by the Republic of Singapore Air Force (RSAF), serving in the fighter-bomber role from 1989 until retirement from front line service in 2005. Since mid-1999, the A-4SU took on the additional role of being the designated advanced jet trainer (AJT) aircraft for the RSAF's AJT training program/detachment in Cazaux, France."Inauguration of the 150 Squadron Building in Cazaux Air Base, France." '' Singaporean Ministry of De ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leading-edge Cuff
A leading-edge cuff is a fixed aerodynamic wing device employed on fixed-wing aircraft to improve the stall and spin characteristics. Cuffs may be either factory-designed or an after-market add-on modification.Crane, Dale: ''Dictionary of Aeronautical Terms, third edition'', page 144. Aviation Supplies & Academics, 1997. A leading-edge cuff is a wing leading-edge modification, usually a lightly drooped outboard leading-edge extension. In most cases of outboard leading-edge modification, the wing cuff starts about 50–70% half-span and spans the outer leading edge of the wing. The main goal is to produce a more gradual and gentler stall onset, without any spin departure tendency, particularly where the original wing has a sharp/asymmetric stall behaviour with a passive, non-moving, low-cost device that would have a minimal impact on performance. A further benefit is to lowering stall speed, with lower approach speeds and shorter landing distances. They may also, depending on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leading-edge Extension
A leading-edge extension (LEX) is a small extension to an aircraft wing surface, forward of the leading edge. The primary reason for adding an extension is to improve the airflow at high angles of attack and low airspeeds, to improve handling and delay the stall. A dog tooth can also improve airflow and reduce drag at higher speeds. Leading-edge slat A leading-edge slat is an aerodynamic surface running spanwise just ahead of the wing leading edge. It creates a leading edge slot between the slat and wing which directs air over the wing surface, helping to maintain smooth airflow at low speeds and high angles of attack. This delays the stall, allowing the aircraft to fly at a higher angle of attack. Slats may be made fixed, or retractable in normal flight to minimize drag. Dogtooth extension A dogtooth is a small, sharp zig-zag break in the leading edge of a wing. It is usually used on a swept wing, to generate a vortex flow field to prevent separated flow from progressi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vortilon
Vortilons are fixed aerodynamic devices on aircraft wings used to improve handling at low speeds. The vortilon was invented by aerodynamicists working at Douglas Aircraft who had previously developed the engine pylons for the Douglas DC-8. The original pylons which wrapped around the leading edge of the wing had to be cut back to reduce excessive cruise drag. Wind tunnel testing of the next Douglas commercial aircraft, the Douglas DC-9 which had no under-wing engines, showed a cutback engine pylon would be beneficial to wing lift and upwash at the tail at the low speed stall. The pylon was reduced in size and became the vortilon (VORTex-generating-pYLON). Vortilons consist of one or more flat plates attached to the underside of the wing near its leading edge, aligned with the flight direction. When the speed is reduced and the aircraft approaches stall, the local flow at the leading edge is diverted outwards; this spanwise component of velocity around the vortilon creates a vort ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
