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Aircraft flight mechanics are relevant to fixed wing (gliders, aeroplanes) and rotary wing (helicopters) aircraft. An aeroplane (airplane in US usage), is defined in ICAO Document 9110 as, "a power-driven heavier than air aircraft, deriving its lift chiefly from aerodynamic reactions on surface which remain fixed under given conditions of ...
The basic concept of compression lift is well known; "planing" boats reduce drag by "surfing" on their own bow wave in exactly the same fashion. Using this effect in aircraft is more difficult, however, because the "wake" is not generated until supersonic speeds are reached, and is highly angled. Aircraft have to be carefully shaped to take ...
Robert Hauschild Liebeck is an American aerodynamicist, [1] professor [2] and aerospace engineer. Until retiring from his position as senior fellow [3] at the Boeing Company. [4] in 2020, [3] he oversaw their Blended Wing Body ("BWB") program. [5][6] He has been a member of the National Academy of Engineering since 1992, where he is an AIAA ...
Lift and drag are the two components of the total aerodynamic force acting on an aerofoil or aircraft. In aerodynamics, the lift-to-drag ratio (or L/D ratio) is the lift generated by an aerodynamic body such as an aerofoil or aircraft, divided by the aerodynamic drag caused by moving through air. It describes the aerodynamic efficiency under ...
Rolls-Royce LiftSystem. Instead of using separate lift engines, like the Yakovlev Yak-38, or rotating nozzles for engine bypass air, like the Harrier, the "LiftSystem" has a shaft-driven LiftFan, designed by Lockheed Martin and developed by Rolls-Royce, [3] and a thrust vectoring nozzle for the engine exhaust that provides lift and can also withstand afterburning temperatures in conventional ...
The new helicopters are compatible with night vision right out of the factory. ... deadliest and most destructive fires in California, and 2024’s fire season is already more active than the year ...
September 11, 2024 at 4:36 PM. A resident stops to watch the Airport Fire burn near his home in the Santa Ana Mountains. (Wally Skalij/Los Angeles Times) As four fires grew in Southern California ...
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