![]() ![]() There do, however, exist databases of UAV components, e.g. At the time of launching, January 2019, there existed no such open resource that include flight testing data of unmanned aircraft. ![]() The goal of the database is to provide researchers and enthusiasts with UAV flight and ground testing data to enable advancement while minimizing the need for repeated testing. Conducting flight testing is also risky and often requires certification (e.g. The effort may span many months or possibly years to develop an aircraft, which may only be flight tested for a limited time. In summation, these stages become extremely costly in terms of resources as well as time. ![]() Then comes ground testing, which may involve loads testing, moment of inertia measurement, and pre-flight combined systems testing. Next, instrumentation follows a similar development route. First the airframe must be developed, which may involve design creation. The development of a new UAV platform is a time-consuming task. Research UAVs are being developed to study flight/aerodynamic qualities and new aircraft configurations, develop new flight hardware and control algorithms, validate prediction and simulation methods, and as low-cost stand-ins for their full-scale counterparts. In the past several years, there has been a major increase in the popularity of unmanned aerial vehicles (UAVs) for a variety of applications and part of this uptrend includes an increase in research. The database is freely-available with the intention of distributing information to aid the advancement of aeronautical science and engineering research. Naca-tn-2591 The Effects of Reynolds Number on the Application of NACA 16 Series Airfoil Characteristics to Propeller Design.The Unmanned Aerial Vehicle Database is an online source for data collected on unmanned aircraft and their sub-components. Naca-tn-2591 The Effects of Reynolds Number on the Application of NACA 16 Series Airfoil Characteristics to Propeller Design.pdf In both tunnels the modelsĬompletely spanned the jet thus, the results are essentially two. Both tunnels have degrees of turbulencé‘which are small though Mach number of approximately 0.80 for'a 5-inch, l5-percent-thick air-įoil. Induction type of tunnel with the speed continuously controllable to a The Langley 2h-inch high-speed tunnel was a nonreturn u Langley 8-foot high-Speed tunnel was a closed-throat single-return tunnelĪnd the speed was continuously controllable up to a Mach number of approxi. The tests were made in the Langley 8-foot high-speed tunnel and in Is representative of blade widths commonly used on full-scale propellers. A comparison of data from 5- andġ2-inch-chord airfoils has additional significance because a 12-inch chord In order to provide at least a qualitative answer to these questions,Īn analysis has been made of some data available_on several NACA l6-seriesĪirfoils of both 5- and 12-inch chord. The question therefore has arisen as to the validity ofĪpplying these test data directly to larger scale designs. NACA l6-series airfoil sections have been conducted on blades of this In addition, most of the tests of model propellers using ![]() Sections for which data are obtained from tests of models of 2- toĥ-inch chord. ‘These propellers are made up to a great degree of high-speed airfoil Obtained under conditions of scale which differ from those of operation. The design of present-day propellers is usually based upon data The design condition, differences of less than 1 percent in efficiency LQ-inch-chord data are applied to full-scale propeller design at or near This analysis has shown that the combined effects of Reynolds num-īer changes and variations in airfoil Characteristics omĭifferences in models and tunnels are such that, when 5-inch-chord and Langley 2h-inch high-speed tunnel and lB-inch-chord models in the L6-series propeller airfoils from tests of 5-inch-chord models in the National Advisory Committee for Aeronautics, Technical Notes - The Effects of Reynolds Number on the Application of NACA 16 Series Airfoil Characteristics to Propeller DesignĪn analysis has been made of airfoil data taken on several NACA ![]()
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