|
Aurora XV-24A LightningStrike
The Aurora XV-24 LightningStrike is an experimental unmanned aerial vehicle created by Aurora Flight Sciences and partners Rolls-Royce and Honeywell. It was developed for the Vertical Take-Off and Landing Experimental Aircraft program. Development On 3 March 2016, DARPA awarded Aurora Flight Sciences $89.4 million to build and demonstrate their LightningStrike concept, beating out the other three competitors. Phase II of the VTOL X-Plane project will fabricate two air vehicles before flight testing, planned by September 2018.VIDEO: Aurora’s LightningStrike wins DARPA VTOL X-plane comp - Flightglobal.com, 4 March 2016 [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unmanned Aerial Vehicle
An unmanned aerial vehicle (UAV) or unmanned aircraft system (UAS), commonly known as a drone, is an aircraft with no human pilot, crew, or passengers onboard, but rather is controlled remotely or is autonomous.De Gruyter Handbook of Drone Warfare; 2024. e-ISBN (PDF) 978-3-11-074203-9.H. Pan; M. Zahmatkesh; F. Rekabi-Bana; F. Arvin; J. HuT-STAR: Time-Optimal Swarm Trajectory Planning for Quadrotor Unmanned Aerial Vehicles IEEE Transactions on Intelligent Transportation Systems, 2025. UAVs were originally developed through the twentieth century for military missions too "dull, dirty or dangerous" for humans, and by the twenty-first, they had become essential assets to most militaries. As control technologies improved and costs fell, their use expanded to many non-military applications. These include aerial photography, area coverage,F. Rekabi-Bana; Hu, J.; T. Krajník; Arvin, F.,Unified Robust Path Planning and Optimal Trajectory Generation for Efficient 3D Area Coverage of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turboshaft
A turboshaft engine is a form of gas turbine that is optimized to produce shaft horsepower rather than jet thrust. In concept, turboshaft engines are very similar to turbojets, with additional turbine expansion to extract heat energy from the exhaust and convert it into output shaft power. They are even more similar to turboprops, with only minor differences, and a single engine is often sold in both forms. Turboshaft engines are commonly used in applications that require a sustained high power output, high reliability, small size, and light weight. These include helicopters, auxiliary power units, boats and ships, tanks, hovercraft, and stationary equipment. Overview A turboshaft engine may be made up of two major parts assemblies: the 'gas generator' and the 'power section'. The gas generator consists of the Gas compressor, compressor, combustion chambers with ignitors and fuel nozzles, and one or more stages of turbine. The power section consists of additional stages of turbi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Active United States Military Aircraft
The United States Armed Forces uses a wide variety of military aircraft across the respective aviation arms of its various service branches. The numbers of specific aircraft listed in the following entries are estimates from published sources and may not be exhaustive. For aircraft no longer in service, see the list of military aircraft of the United States. Air Force Army Coast Guard *"In service" sources: Marine Corps Navy Space Force See also *United States Army Aviation Branch#Equipment *United States Marine Corps Aviation#Current inventory *List of currently active United States naval aircraft *List of active United States Air Force aircraft *List of military aircraft of the United States *Future military aircraft of the United States *List of U.S. DoD aircraft designations *UAVs in the U.S. military *Fox (code word) References Bibliography * * * * {{DEFAULTSORT:Active United States Military Aircraft Lists of currently active ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lilium Jet
The Lilium Jet is a prototype German electric vertical take-off and landing (eVTOL) electrically powered airplane designed by Lilium GmbH. A seven-seat production version is planned. History Initial design studies included forward-folding wings, so that the aircraft could be piloted as a VTOL and recharge in only few hours from a standard 240 V electrical outlet. A first half-scale demonstrator, ''Falcon'', flew in 2015. The unmanned first flight of the two-seat ''Eagle'' full size prototype was on 20 April 2017 at the Mindelheim-Mattsies airfield, Bavaria, Germany. Unmanned flight testing of the five-seat Lilium Jet took place at Oberpfaffenhofen airfield near Munich. It first flew in May 2019. By October 2019, after 100 flights, it could transition from vertical to horizontal flight, reaching over , but not yet fully horizontal. It managed 25° banked turns, high ascent/descent rates like in operations, hover turns and sideward translations. Electrical, fan and flap failu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
UH-1Y Venom
The Bell UH-1Y Venom (also called Super Huey) is a twin-engine, 4-blade, medium-sized utility helicopter built by Bell Helicopter under the H-1 upgrade program of the United States Marine Corps. One of the latest members of the numerous Huey family, the UH-1Y is also called "Yankee" for the NATO phonetic alphabet pronunciation of its variant letter. Bell was originally to produce UH-1Ys by rebuilding UH-1Ns, but ultimately used new built airframes. In 2008, the UH-1Y entered service with the Marine Corps and also began full-rate production. The new UH-1 variant replaced the USMC's UH-1N Twin Huey light utility helicopters, introduced in the early 1970s. The helicopter (and related Bell AH-1Z Viper) were ordered by the Czech Republic and the helicopter is in production in the early 2020s. Visually, some features that differentiate the Y model are a slightly longer cabin and larger twin engine exhaust vents compared to the earlier N model. Development Over the years, new a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wind Turbine
A wind turbine is a device that wind power, converts the kinetic energy of wind into electrical energy. , hundreds of thousands of list of most powerful wind turbines, large turbines, in installations known as wind farms, were generating over 650 gigawatts of power, with 60 GW added each year. Wind turbines are an increasingly important source of intermittent renewable energy, and are used in many countries to lower energy costs and reduce reliance on fossil fuels. One study claimed that, wind had the "lowest relative greenhouse gas emissions, the least water consumption demands and the most favorable social impacts" compared to photovoltaic, hydroelectricity, hydro, geothermal power, geothermal, coal power, coal and gas-fired power plant, gas energy sources. Smaller wind turbines are used for applications such as battery charging and remote devices such as traffic warning signs. Larger turbines can contribute to a domestic power supply while selling unused power back to the u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Horsepower
Horsepower (hp) is a unit of measurement of power, or the rate at which work is done, usually in reference to the output of engines or motors. There are many different standards and types of horsepower. Two common definitions used today are the imperial horsepower as in "hp" or "bhp" which is about , and the metric horsepower as in "cv" or "PS" which is approximately . The electric horsepower "hpE" is exactly , while the boiler horsepower is 9809.5 or 9811 watts, depending on the exact year. The term was adopted in the late 18th century by Scottish engineer James Watt to compare the output of steam engines with the power of draft horses. It was later expanded to include the output power of other power-generating machinery such as piston engines, turbines, and electric motors. The definition of the unit varied among geographical regions. Most countries now use the SI unit watt for measurement of power. With the implementation of the EU Directive 80/181/EEC on 1 January 201 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canard (aeronautics)
In aeronautics, a canard is a wing configuration in which a small forewing or foreplane is placed forward of the main wing of a fixed-wing aircraft or a weapon. The term "canard" may be used to describe the aircraft itself, the wing configuration, or the foreplane.Clancy, L. J. (1975). ''Aerodynamics'', Pitman (UK), Halsted (US), 1975. Pages 292-3.. Canard wings are also extensively used in guided missiles and smart bombs. The term "canard" arose from the appearance of the Santos-Dumont 14-bis of 1906, which was said to be reminiscent of a duck (''canard'' in French) with its neck stretched out in flight. Despite the use of a canard surface on the first powered aeroplane, the Wright Flyer of 1903, canard designs were not built in quantity until the appearance of the Saab Viggen jet fighter in 1967. The aerodynamics of the canard configuration are complex and require careful analysis. Rather than use the conventional tailplane configuration found on most aircraft, an a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rolls-Royce T406
The Rolls-Royce T406 (company designation AE 1107) is a turboshaft engine developed by Allison Engine Company (now part of Rolls-Royce) that powers the Bell Boeing V-22 Osprey tiltrotor. The engine delivers 6,000 shp (4,470 kW). Development In 1982, Detroit Diesel Allison (DDA) prepared a new engine design to enter the United States Army's Modern Technology Demonstrator Engine (MTDE) competition, which was expected to be developed into the powerplant for the United States Navy's JVX experimental tiltrotor aircraft program (which would eventually become the Bell Boeing V-22 Osprey). After this engine, which DDA called the Model 580, lost the competition to Pratt & Whitney and General Electric in 1983, Allison was separated from Detroit Diesel as a separate division within General Motors, and Allison's new management decided to pursue the V-22 engine contract anyway. On 24 December 1985, the U.S. Navy selected Allison's engine for full-scale engine development and product ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aurora Flight Sciences
Aurora Flight Sciences (AFS) is an American aviation and aeronautics research subsidiary of Boeing that specializes in special-purpose unmanned aerial vehicles. Aurora's headquarters is at Manassas Regional Airport. History In 1989, AFS was founded in Alexandria, Virginia, as a follow-on to the MIT Daedalus project. In 1991, its first aircraft was the Perseus proof of concept (POC) built for NASA which first flew at NASA Dryden. It was followed by two Perseus As and one Perseus B – built for the NASA ERAST Program. A twin engine Theseus was also built. In 1995, Aurora joined the Global Hawk team to build composite fuselage components and tail assemblies of the RQ-4 for Northrop Grumman and the USAF. In 2002, a demonstration aircrafMars High Altitude Deployment Demonstratorwas flown from an altitude of 100,000 feet to simulate the low density of the Martian atmosphere. Aurora was involved in NASA programs studying how to fly on Mars. In 2008, the DARPA Vulture aimed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Distributed Propulsion
In aeronautics, Distributed propulsion is an arrangement in which the propulsive and related air flows are distributed over the aerodynamic surfaces of an aircraft. The purpose is to improve the craft's aerodynamic, propulsive and/or structural efficiency over an equivalent conventional design. Anticipated benefits include improved fuel efficiency, emissions, noise, landing field length and handling. Distributed propulsion may be accomplished by spanwise distribution of partially or fully embedded multiple small engines or fans along the wing. Alternatively, it may involve ducting exhaust gases along the wing's entire trailing edge. Design principles Definition Distributed propulsion on an aircraft is typically characterised not only by the distributed nature of the propulsive thrust but also by utilisation of the effect this has on the aircraft aerodynamics.Epstein, A. H. (2007"Distributed Propulsion: New Opportunities For An Old Concept" MIT. (retrieved 16 June 2022). The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
