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Alisport Silent 2 Targa
The Silent 2 Targa is a single seater sailplane of Italian manufacture. It is of the FAI DU Class glider. It is sold by Alisport ready-to-fly or kit-built as pure glider or self-launching glider. The self-launching version can be fitted with a single-blade propeller belt-driven by a two-stroke engine or with a double-blade folding propeller directly driven by an electric motor.Vandermeullen, Richard: ''2012 Kit Aircraft Buyer's Guide'', Kitplanes, Volume 28, Number 12, December 2011, pages 41-42. Belvoir Publications. ISSN 0891-1851Bayerl, Robby; Martin Berkemeier; et al: ''World Directory of Leisure Aviation 2011-12'', page 132. WDLA UK, Lancaster UK, 2011. ISSN 1368-485X Development The development of the Silent goes back to the early 1990s and its roots can be found in Walter Mauri's light sailplane called the "Dream". On 8 December 1994 the definitive prototype of Silent light sailplane made its maiden flight from the small grass strip of Gagliano in the northeastern Italian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
FAI World Class
Competition classes in gliding, as in other sports, mainly exist to ensure fairness in competition. However the classes have not been targeted at fostering technological development as in other sports. Instead classes have arisen because of: * the popularity of certain types of glider * attempts to contain the cost of access to the sport * the need to establish a stable environment for investment decisions by both manufacturers and competitors. The FAI Gliding Commission (IGC) is the sporting body overseeing air sports at the international level so that essentially the same classes and class definitions are followed in all countries. FAI Competition Classes Seven glider classes are currently recognised by the FAI and are eligible for European and World Championships: * Open Class, places no restrictions except a limit of 850 kg to the maximum all-up mass, may be one- or two-seater e.g. JS-1C, Lange Antares 23E, Quintus, ASW 22, ASH 30, LAK-20. * Standard Class, restr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alisport
Alisport srl is an Italian aircraft manufacturer based in Cremella. The company specializes in the design and manufacture of light aircraft and sailplanes in the form of kits for amateur construction and ready-to-fly aircraft for the European Fédération Aéronautique Internationale microlight category, as well as aircraft propellers.Bayerl, Robby; Martin Berkemeier; et al: ''World Directory of Leisure Aviation 2011-12'', pages 24, 132. WDLA UK, Lancaster UK, 2011. ISSN 1368-485XVandermeullen, Richard: ''2011 Kit Aircraft Buyer's Guide'', Kitplanes, Volume 28, Number 12, December 2011, page 41. Belvoir Publications. ISSN 0891-1851 The company has three aviation divisions in a shared manufacturing facility, which produce the Silent line of sailplanes, microlight STOL aircraft and the Idrovario line of propellers. Alisport has multi-axis computer numerical control milling machines, composite curing ovens and environmentally-friendly paint booths. The company produces the Ali ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alisport Silent 2 Electro
The Alisport Silent 2 Electro is an Italian mid-wing, single-seat motor glider, designed and produced by Alisport of Cremella and provided as a complete ready-to-fly aircraft. The aircraft was introduced at the Aero show held in Friedrichshafen in 2011.Bayerl, Robby; Martin Berkemeier; et al: ''World Directory of Leisure Aviation 2011–12'', page 132. WDLA UK, Lancaster UK, 2011. ISSN 1368-485X Design and development The Silent 2 Electro was derived from the Alisport Silent 2 Targa and differs primarily in having the front electric sustainer with its nose-mounted electric motor and propeller and associated batteries and controllers. It was originally called the ''Silent Targa E''. The aircraft is made from composites and features a T-tail. The wing skins are made from a composite sandwich built over pultruded carbon fibre spars. Its span, elliptical planform wing employs a 16% IMD 050 airfoil, has an area of and mounts flaperons. The bubble canopy tips up for acce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sailplane
A glider or sailplane is a type of glider aircraft used in the leisure activity and sport of gliding (also called soaring). This unpowered aircraft can use naturally occurring currents of rising air in the atmosphere to gain altitude. Sailplanes are aerodynamically streamlined and so can fly a significant distance forward for a small decrease in altitude. In North America the term 'sailplane' is also used to describe this type of aircraft. In other parts of the English-speaking world, the word 'glider' is more common. Types Gliders benefit from producing very low drag for any given amount of lift, and this is best achieved with long, thin wings, a slender fuselage and smooth surfaces with an absence of protuberances. Aircraft with these features are able to soar – climb efficiently in rising air produced by thermals or hills. In still air, sailplanes can glide long distances at high speed with a minimum loss of height in between. Sailplanes have rigid wings and either ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Single-blade Propeller
A single-blade propeller may be used on aircraft to generate thrust. Normally propellers are multi-blades but the simplicity of a single-blade propeller fits well on motorized gliders, because it permits the design of a smaller aperture of the glider fuselage for retraction of the power plant. The counterbalanced teetering mono-blade propeller generates fewer vibrations than conventional multi-blade configurations. Often, single blade propeller configurations are touted as having a much greater efficiency than multi-blade propellers, but this is a falsehood outside the inertial losses in spinning a heavier propeller, and the minimal additional drag from added blades. Single bladed propellers are principally used to fulfill engineering requirements that fall outside the scope of efficiency. Patents US Patent 2742095 Mechanism for balancing single blade aircraft rotorUS Patent 6619585 Helicopter single-blade rotorUS Patent 5971322- Propeller propulsion unit for aircraft in gene ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Two-stroke Engine
A two-stroke (or two-stroke cycle) engine is a type of internal combustion engine that completes a Thermodynamic power cycle, power cycle with two strokes of the piston, one up and one down, in one revolution of the crankshaft in contrast to a four-stroke engine which requires four strokes of the piston in two crankshaft revolutions to complete a power cycle. During the stroke from bottom dead center to top dead center, the end of the exhaust/intake (or Scavenging (automotive), scavenging) is completed along with the compression of the mixture. The second stroke encompasses the combustion of the mixture, the expansion of the burnt mixture and, near bottom dead center, the beginning of the scavenging flows. Two-stroke engines often have a higher power-to-weight ratio than a four-stroke engine, since their power stroke occurs twice as often. Two-stroke engines can also have fewer moving parts, and thus be cheaper to manufacture and weigh less. In countries and regions with stringe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spoiler (aeronautics)
In aeronautics, a spoiler (sometimes called a lift spoiler or lift dumper) is a device which increases the Drag (physics), drag and decreases the lift (force), lift of an airfoil in a controlled way. Most often, spoilers are hinged plates on the top surface of a wing that can be extended upward into the airflow to ''spoil'' the streamline flow. By so doing, the spoiler creates a controlled Stall (flight), stall over the portion of the wing behind it, greatly reducing the lift of that wing section. Spoilers differ from air brake (aeronautics), airbrakes in that airbrakes are designed to increase drag without disrupting the lift distribution across the wing span, while spoilers disrupt the lift distribution as well as increasing drag. However, flight spoilers are routinely referred to as "speed brakes" on transport aircraft by pilots and manufacturers, despite significantly reducing lift. Spoilers fall into two categories: those that are deployed at controlled angles during flig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Variable-position Horizontal Stabilizer
A variable-position horizontal stabilizer changes the pitch simultaneously with the flaperon setting. Normally the horizontal stabilizer also known as tailplane is fixed and has a hinged elevator, a stabilator is another method that combines the functions of an elevator and a horizontal stabilizer. The variable-position horizontal stabilizer is governed by the flaperon setting: the settings of the flaperon control produce corresponding changes to the stabilizer angle of incidence, thus defining the trim airspeed in relation to the flaperon requirements. The conventional elevator remains in trail, minimizing trim drag. Flaperon settings are used to optimize the lift Lift or LIFT may refer to: Physical devices * Elevator, or lift, a device used for raising and lowering people or goods ** Paternoster lift, a type of lift using a continuous chain of cars which do not stop ** Patient lift, or Hoyer lift, mobile ... and drag of a wing. When the flight requires low speed the flaperons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Politecnico Di Milano
The Polytechnic University of Milan (, abbreviated as PoliMi) is a university in Milan, Italy. It is the largest technical university in the country, with about 40,000 enrolled students. The university offers undergraduate, graduate, and higher education courses in engineering, architecture and design. Established in 1863 by Francesco Brioschi, the Polytechnic University of Milan is the oldest university in Milan; inspired by German and Swiss polytechnic institutes, Brioschi founded the school in the hope of bettering Italy's scientific and technological progress. By the 20th century, the school had gained international recognition thanks to its influential faculty and a strong emphasis on largely modernist principles. The university is made up of two central campuses in Milan, the ''Bovisa'' and ''Leonardo'', where the majority of the research and teaching activities are located, as well as other satellite campuses in five other cities across Lombardy and Emilia-Romagna. The u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aeroelasticity
Aeroelasticity is the branch of physics and engineering studying the interactions between the inertial, elastic, and aerodynamic forces occurring while an elastic body is exposed to a fluid flow. The study of aeroelasticity may be broadly classified into two fields: ''static aeroelasticity'' dealing with the static or steady state response of an elastic body to a fluid flow, and ''dynamic aeroelasticity'' dealing with the body's dynamic (typically vibrational) response. Aircraft are prone to aeroelastic effects because they need to be lightweight while enduring large aerodynamic loads. Aircraft are designed to avoid the following aeroelastic problems: # divergence where the aerodynamic forces increase the twist of a wing which further increases forces; # control reversal where control activation produces an opposite aerodynamic moment that reduces, or in extreme cases reverses, the control effectiveness; and # flutter which is uncontained vibration that can lead to the destr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stall (flight)
In fluid dynamics, a stall is a reduction in the lift coefficient generated by a foil as angle of attack exceeds its critical value.Crane, Dale: ''Dictionary of Aeronautical Terms, third edition'', p. 486. Aviation Supplies & Academics, 1997. The critical angle of attack is typically about 15°, but it may vary significantly depending on the fluid, foil – including its shape, size, and finish – and Reynolds number. Stalls in fixed-wing aircraft are often experienced as a sudden reduction in lift. It may be caused either by the pilot increasing the wing's angle of attack or by a decrease in the critical angle of attack. The former may be due to slowing down (below stall speed), the latter by accretion of ice on the wings (especially if the ice is rough). A stall does not mean that the engine(s) have stopped working, or that the aircraft has stopped moving—the effect is the same even in an unpowered glider aircraft. Vectored thrust in aircraft is used to maintain alti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spin (flight)
In flight dynamics a spin is a special category of stall resulting in autorotation (uncommanded roll) about the aircraft's longitudinal axis and a shallow, rotating, downward path approximately centred on a vertical axis. Spins can be entered intentionally or unintentionally, from any flight attitude if the aircraft has sufficient yaw while at the stall point. In a normal spin, the wing on the inside of the turn stalls while the outside wing remains flying. It is possible for both wings to stall, but the angle of attack of each wing, and consequently its lift and drag, are different. Either situation causes the aircraft to autorotate toward the stalled wing due to its higher drag and loss of lift. Spins are characterized by high angle of attack, an airspeed below the stall on at least one wing and a shallow descent. Recovery and avoiding a crash may require a specific and counter-intuitive set of actions. A spin differs from a spiral dive, in which neither wing is stalled ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
