Reported are the results of wind-tunnel tests conducted to evaluate aerodynamics characteristics of aircraft in formation flight. A vortex-lattice numerical scheme was used to investigate the effect of spatial offset (horizontal and vertical) between the leading and trailing wings. The wind-tunnel ...
Note that in the case of formation flight work is extracted from the drag of aircraft, so Oswatitsch above assumption may not be valid for multiple aircraft, unless the aircraft group are considered a closed system and analyse the total entropy generated due to drag. Oswatitsch's statement...
A review of design issues specific to hypersonic flight vehicles 4.1 Aerodynamics One of the greatest concerns with a hypersonic vehicle is the aerodynamic performance. Due to the extensive range of speeds the operational envelope covers, the designs have to fulfil several, often contradictory requireme...
Life Stag beetles' unwieldy jaws are surprisingly slick in flight News Free Advertisement Life Formation-flying birds swap places to share out lift Birds that benefit from each other's aerodynamic lift take turns to do the harder work out front – a rare example of reciprocal altruism News ...
1.从文中第一段 “The answer lies in aerodynamics (空气动力学),” 以及 “They also found that the impact of aerodynamics depends on the size of the flying group” 可知,纽约大学研究人员对鸟类研究的主要关注点是空气动力学对鸟类群体的影响,D 选项正确。A 选项鸟类的迁徙模式、B 选项早春的飞行路线...
FMAV combines the concepts of FMAV and rotary wing. Unlike FMAVs, multi-rotor drone is capable to stabilize its flight. Thus, it raises the question that whether the flight of the micro four-wing FMAV is inherently stable, which must be answered before the design of FMAV controlling ...
people who are interested in flight are still misled by some misconceptions and even wrong “theories” in non-technical literature. This is evidenced by the widely popularized myth that the laws of aerodynamics prove that the bumblebee cannot fly [1]. There are various popular explanations for ...
in hovering flight. Its wing length is about 1.4 mm. The reasons we chose the vegetable leafminers were that it is one of the smallest species in the order ofDiptera1and that they perform well hovering in the laboratory conditions. We first measured the time course of the wing motion, ...
Related societies’ and association : The American Society of Mechanical Engineers, American Institute of Aeronautics and Astronautics, American Helicopter Society, The Royal Aeronautical Society, Society of Flight Test Engineers. Track 2: Aerodynamics The way air moves around objects is through aerodynami...
–Secondary:Disruptioninsizeandnumberofwingtipvortices(downwardandoutwardflowofairdiscouragesvortexformation)TheTransitiontoDirectionalFlight Becausehoveringisfun,butitisn’tgettingusanywhere.TranslationalLift •Additionalliftbecauseofhorizontalmovementwithrespecttotheair –Airflowtransitionsfromverticalatahovertomore...