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Electra EL-2 Goldfinch
The Electra EL-2 Goldfinch is a technology demonstrator developed by American startup Electra.aero. The EL-2 is a hybrid electric aircraft with distributed propulsion for short takeoff and landing (STOL). Development Electra creator John Langford founded Aurora Flight Sciences in 1989, sold to Boeing in 2017. The first test flight happened on November 11, 2023, all-electric powered, from Manassas Regional Airport in Virginia. On November 17, it flew again for 23 minutes, powered by its hybrid-electric drivetrain, reaching . Electra.aero wants to develop a nine passenger-aircraft (or of cargo) capable of operating from an area soccer field-sized with a ground roll, for a range. The company aims to fly a full-scale prototype in 2026, then a certification test aircraft targeted for a 2028 introduction. By late April 2024, the demonstrator had flown for over 10 hours and had achieved landings and takeoffs. Its longest flight exceeded 1.5 hrs, its highest altitude reached was , ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hybrid Electric Aircraft
A hybrid electric aircraft is an aircraft with a Hybrid electric vehicle, hybrid electric powertrain. As the energy density of lithium-ion batteries is much lower than aviation fuel, a hybrid electric powertrain may effectively increase flight range compared to pure electric aircraft. By May 2018, there were over 30 hybrid electric aircraft projects, and short-haul hybrid-electric airliners were envisioned from 2032. History The Boeing Truss-Braced Wing subsonic concept was planned with hybrid electric propulsion. The Diamond DA36 E-Star first flew on 8 June 2011, the first flight of a series hybrid powertrain, reducing fuel consumption and emissions by up to 25%, a technology scalable to a 100-seater airliner. A small and lighter Austro Engine 40 hp (30 kW) Wankel engine generates the electricity, supplemented by EADS batteries for silent take off, feeding a Siemens 70 kW (94 hp) electric motor turning the propeller. The AgustaWestland Project Zero was inten ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Advanced Research Projects Agency-Energy
ARPA-E, or Advanced Research Projects Agency–Energy is an agency within the United States Department of Energy tasked with funding the research and development of advanced energy technologies. The goal of the agency is to improve U.S. economic prosperity, national security, and environmental well being. ARPA-E typically funds short-term research projects with the potential for a transformative impact. It is inspired by the Defense Advanced Research Projects Agency (DARPA). The program directors at ARPA-E serve limited terms, in an effort to reduce bureaucracy and bias. the director is Evelyn Wang. History and mission Legislative history ARPA-E was initially conceived by a report by the National Academies entitled ''Rising Above the Gathering Storm: Energizing and Employing America for a Brighter Economic Future''. The report described a need for the US to stimulate innovation and develop clean, affordable, and reliable energy. ARPA-E was officially created by the America ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NASA X-57 Maxwell
The NASA X-57 Maxwell was an experimental aircraft developed by NASA, intended to demonstrate technology to reduce fuel use, emissions, and noise. The first flight of the X-57 was scheduled to take place in 2023, but the program was cancelled due to problems with the propulsion system. Development The experiment involved replacing the wings on a twin-engined Italian-built Tecnam P2006T (a conventional four-seater light aircraft) with distributed electric propulsion (DEP) wings, each containing electrically driven propellers. Test flights were initially planned to commence in 2017. The first test phase used an 18-engine truck-mounted wing. The second phase installed the cruise propellers and motors on a standard P2006T for ground- and flight-test experience. Phase 3 tests were to involve the high-lift DEP wing and demonstrate increased high-speed cruise efficiency. The leading-edge nacelles would be fitted, but the high-lift propellers, motors and controllers would not be inst ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aviation International News
Aviation International News (AIN Media Group / The Convention News Company) is a periodical and newspaper publisher about aviation, published through its website and in hard copy. History The Convention News Company was founded by aviation editor James Holahan and publisher Wilson S. Leach in 1972 and published its first issues at that year's NBAA convention. Now branded as AIN Media Group, it has branched into other aviation sectors and other products, and still publishes NBAA Convention News. In 2002, Aviation International News received an award for "excellent, accurate and insightful reporting of issues related to the business aviation industry" from the National Business Aviation Association at its 55th Annual Meeting & Convention. Publications AIN Publications publishes the following media: * Aviation International News is a monthly trade publication in print and digital focused on business aviation, delivered to 38,000 readers; * AINalerts is a workweek daily new ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Decibel
The decibel (symbol: dB) is a relative unit of measurement equal to one tenth of a bel (B). It expresses the ratio of two values of a Power, root-power, and field quantities, power or root-power quantity on a logarithmic scale. Two signals whose level (logarithmic quantity), levels differ by one decibel have a power ratio of 101/10 (approximately ) or root-power ratio of 101/20 (approximately ). The strict original usage above only expresses a relative change. However, the word decibel has since also been used for expressing an Absolute scale, absolute value that is relative to some fixed reference value, in which case the dB symbol is often suffixed with letter codes that indicate the reference value. For example, for the reference value of 1 volt, a common suffix is "#Voltage, V" (e.g., "20 dBV"). As it originated from a need to express power ratios, two principal types of scaling of the decibel are used to provide consistency depending on whether the scaling refer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Auxiliary Power Unit
An auxiliary power unit (APU) is a device on a vehicle that provides energy for functions other than propulsion. They are commonly found on large aircraft and naval ships as well as some large land vehicles. Aircraft APUs generally produce 115 V AC voltage at 400 Hz (rather than 50/60 Hz in mains supply), to run the electrical systems of the aircraft; others can produce 28 V DC voltage. APUs can provide power through single or three-phase systems. A jet fuel starter (JFS) is a similar device to an APU but directly linked to the main engine and started by an onboard compressed air bottle. Transport aircraft History During World War I, the British Coastal class blimps, one of several types of airship operated by the Royal Navy, carried a ABC auxiliary engine. These powered a generator for the craft's radio transmitter and, in an emergency, could power an auxiliary air blower. One of the first military fixed-wing aircraft to use an APU was the British, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cessna 172
The Cessna 172 Skyhawk is an American four-seat, single-engine, high wing, fixed-wing aircraft made by the Cessna Aircraft Company."Cessna Skyhawk" (2013), Cessna Aircraft Company. Retrieved 2013-04-12. First flown in 1955, more 172s have been built than any other aircraft. It was developed from the 1948 Cessna 170 but with tricycle landing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
T-tail
A T-tail is an empennage wikt:configuration, configuration in which the tailplane of an aircraft is mounted to the top of the vertical stabilizer, fin. The arrangement looks like the capital letter T, hence the name. The T-tail differs from the standard configuration in which the tailplane is mounted to the fuselage at the base of the fin. Advantages T-tails were common in early jet aircraft. Designers were worried that an engine failure would otherwise damage the horizontal tail. The T-tail is very common on aircraft with engines mounted in nacelles on a Wing_configuration#Number_and_position_of_main_planes, high-winged aircraft or on aircraft with the engines mounted on the rear of the fuselage, as it keeps the tail clear of the jet exhaust. Rear-mounting the engines keeps the wings clean and improves short-field performance. This was necessary in early jet aircraft with less powerful engines. T-tail aircraft can have better short-field performance, such as on the Bri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blown Flap
Blown flaps, blown wing or jet flaps are powered aerodynamic high-lift devices used on the wings of certain aircraft to improve their low-speed flight characteristics. They use air blown through nozzles to shape the airflow over the rear edge of the wing, directing the flow downward to increase the lift coefficient. There are a variety of methods to achieve this airflow, most of which use jet exhaust or high-pressure air bled off of a jet engine's compressor and then redirected to follow the line of trailing-edge flaps. ''Blown flaps'' may refer specifically to those systems that use internal ductwork within the wing to direct the airflow, or more broadly to systems like upper surface blowing or nozzle systems on conventional underwing engine that direct air through the flaps. Blown flaps are one solution among a broader category known as powered lift, which also includes various boundary layer control systems, systems using directed prop wash, and circulation control wings ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turbogenerator
A turbo generator is an electric generator connected to the shaft of a turbine (water, steam, or gas) for the generation of electric power. Large steam-powered turbo generators provide the majority of the world's electricity and are also used by steam-powered turbo-electric ships. Small turbo-generators driven by gas turbines are often used as auxiliary power units (APU, mainly for aircraft). History The first turbo-generators were electric generators powered by water turbines. The first Hungarian water turbine was designed by the engineers of the Ganz Works in 1866; industrial-scale production with dynamo generators started only in 1883. Engineer Charles Algernon Parsons demonstrated a DC steam-powered turbo generator using a dynamo in 1887, and by 1901 had supplied the first large industrial AC turbo generator of megawatt power to a plant in Elberfeld, Germany. Turbo generators were also used on steam locomotives as a power source for coach lighting and water pumps ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pipistrel Velis Electro
The Pipistrel Velis Electro is a Slovenian light aircraft, designed and produced by Pipistrel of Ajdovščina. The aircraft was EASA CS-LSA fully electric type certified in June 2020 and it is intended primarily for the training aircraft role, particularly multiple successive take-off and landings at the airfield. The design is the first type certified electric aircraft and is supplied complete and ready-to-fly. Design The aircraft is based on the Pipistrel Virus airframe and features a cantilever high-wing, a two-seats-in- side-by-side configuration in an enclosed cabin accessed via doors. It has a stick shaker and fixed tricycle landing gear and a single electric motor in tractor configuration. The airframe is predominantly made from composite materials. Its span wing, has an area of , an aspect ratio of 12.03:1, an IMD 029-b airfoil and mounts three-position flaps, with settings of 0°, 8° and 19°. The sole approved powerplant is the liquid-cooled Pipistrel E-8 ... [...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] |
