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Thursday, May 21, 2020 | History

3 edition of Flight measurements of surface pressures on a flexible supercritical research wing found in the catalog.

Flight measurements of surface pressures on a flexible supercritical research wing

Flight measurements of surface pressures on a flexible supercritical research wing

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  • 17 Currently reading

Published by National Aeronautics and Space Administration, Scientific and Technical Information Branch, For sale by the National Technical Information Service] in [Washington, DC], [Springfield, Va .
Written in English

    Subjects:
  • Airplanes -- Wings.

  • Edition Notes

    StatementClinton V. Eckstrom.
    SeriesNASA technical paper -- 2501.
    ContributionsUnited States. National Aeronautics and Space Administration. Scientific and Technical Information Branch.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL14664589M

    Critical Flight Measurements Using Pressure Welcome to All Sensors “Put the Pressure on Us” blog. This blog brings out pressure sensor aspects in a variety of applications inspired by headlines, consumer and industry requirements, market research, government activities and you.   Influence of Wing Shapes on Surface Pressure Fluctuations at Wing-Body Junctions. Time-resolved surface heat flux measurements in the wing/body junction vortex. In-Flight Wavenumber Characterization of Surface Pressure Fluctuations at Transonic by:

    Usually, aircraft wings have various devices, such as flaps or slats that the pilot uses to modify the shape and surface area of the wing to change its operating characteristics in flight. In , Francis Rogallo invented the fully limp flexible wing, which ushered new possibilities for aircraft. The results of an experimental program are presented in the form of PVT data in the temperature range 58 to K at pressures up to bar. Tables of the derived thermodynamic properties on isobars to bar are given, including density, internal energy, enthalpy, entropy, specific heats at constant volume and constant pressure, velocity of sound, and the surface derivatives (delta P/delta.

    A fixed-wing aircraft is an aircraft, such as an aero plane, which is capable of flight using wings that generate lift caused by the vehicle's forward airspeed and the shape of the wings. Fixed-wing aircraft are distinct from rotary-wing aircraft [1], in which the wings form a rotor mounted on a. Analyses are made of data from a % DC aircraft model test, conducted in the 40 × 80 feet wind tunnel at NASA Ames Research Center. Results for various slat/wing/flap configurations and various flow conditions are discussed in detail to reveal major trends in surface pressure by:


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Flight measurements of surface pressures on a flexible supercritical research wing Download PDF EPUB FB2

Get this from a library. Flight measurements of surface pressures on a flexible supercritical research wing. [Clinton V Eckstrom; United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch.].

An F, with a variable-geometry wing, was the test aircraft and the basic supercritical research took place between and Results were extremely successful and showed the test wing generated up to 30% more lift than the conventional F wing and performed as expected at all wing-sweep angles.

The F program, while it did notFile Size: KB. In-Flight Measurement of Wing Surface Pressures on a Small-Scale UAV During Stall/Spin Maneuvers. Flight Testing Automation to Parameterize Unmanned Aircraft Dynamics. Unsteady surface pressure measurements on a pitching rectangular wing.

In-Flight Measurement of Wing Surface Pressures on a Small-Scale UAV During Stall/Spin Maneuvers Conference Paper (PDF Available) June with Reads How we measure 'reads'. *This research was conducted in part under the McDonnell Douglas Independent Research and Development Program. Abstract Measurements of surface-pressure and wake-flow fluctuations were made as part of a transonic wind-tunnel investigation into the detailed nature of a Whitcomb type supercritical airfoil flow Size: 2MB.

Pressure Sensitive Paint Evaluation on a Supercritical Wing at Cruise Speed. Journal of Visualization, Vol. 4 [7] i, N.P.

Stokes, S.D. Fonov, et al. Pressure Sensitive Paint Measurements at the ARA Transonic Wind : Qiang Zhou, Jian Xiong, Liusheng Chen, Husheng Ma, Yang Tao.

airfoil here was designed for an ultralight sailplane requiring very high maximum lift coefficients with small pitching moments at high speed.

One possible solution: a variable geometry airfoil with flexible lower surface. The airfoil used on the Solar Challenger, an aircraft that File Size: KB. Aircraft flight control surfaces are aerodynamic devices allowing a pilot to adjust and control the aircraft's flight attitude.

Development of an effective set of flight control surfaces was a critical advance in the development of aircraft. Early efforts at fixed-wing aircraft design succeeded in generating sufficient lift to get the aircraft off the ground, but once aloft, the aircraft.

The present paper will be concentrated on what role free flight experiments may play in the study of turbulent shear layers, and in particular the study of three-dimensional boundary layers on swept wings.

“Flight Measurements of Surface Pressures on a Flexible Supercritical Research Wing”. NASA TPDec Google Scholar. Cited by: 4. simulation of full-scale flight Reynolds numbers with reasonably sized models at relatively low dynamic pressures.

Among the many uses of this test tech-nology is the basic study of two-dimensional flow over airfoils as a function of both Mach number and Reynolds number.

One such stu_ty, which was con-ducted in the Langley Meter Transonic. F-8 Supercritical Wing Flight Pressure, Boundary-Layer, and Wake Measure ments and Comparison With Wind Tunnel Data Author Lawrence C. Montoya and Richard D.

Banner. The unsteady aerodynamic lifting surface theory, the Doublet Lattice method, with experimental steady and unsteady pressure measurements of a high aspect ratio supercritical wing model at a Mach. First Flexible Airplane Wing Takes Flight. In our May issue, Sridhar Kota, a professor of engineering at the University of Michigan and founder and president of the company FlexSys, published.

Balance measurements, made on the same wind-tunnel model, are also reported and compared briefly with flight data. Details of Wind-Tunnel ExperimentsFig. 1 is a general-arrangement sketch of the half- span model showing the positions of the four lines of pressure holes that were incorporated.

The Measurement of Air Flow: 5th Edition (in SI Units) deals primarily with the measurement (expressed in SI units) of the speed of air in motion relative to solid boundaries or surfaces. The methods described apply not only to air flow but also to the flow of other gases with little, if any, modification, except as regards the numerical values.

This is done with different free-stream mach numbers ranging from subsonic to supercritical. These measurements are used to assess the validity of the Prandtl-Glauret Law, which relates the pressure coefficient at a point on the surface of an aerofoil in sub-critical, compressible flow to that at the same point in incompressible flow.

different approaches with oil film measurements At the beginning of nineties method for direct measurements of surface shear force was offe Method includes mount on the model surface of sensing element in the form of film made of flexible material-polymer gel of desired thickness with known shear modulus; markers are applied toFile Size: KB.

The modified aircraft easily passed through Mach and entered the supersonic speed regime. The way in which the appearance of the F aircraft was altered by application of the area rule is illustrated in figure At the upper left is the experimental Convair XFA delta-wing research aircraft.

The directional control of a fixed-wing aircraft takes place around the lateral, longitudinal, and vertical axes by means of flight control surfaces designed to create movement about these axes. These control devices are hinged or movable surfaces through which the attitude of an aircraft is controlled during takeoff, flight, and landing.

They are usually divided into two major groups: 1. The upper surface has pressures distributed which produce the upper surface lift. The lower surface has pressures distributed which produce the lower surface force. Net lift produced by the airfoil is the difference between lift on the upper surface and the force on the lower surface.

FLIGHT MEASUREMENTS OF AIRPLANE STRUCTURAL TEMPERATURES AT SUPERSONIC SPEEDS By Richard D. Banner SUMMARY Skin and structural temperatures have been obtained on the X-1B and X-1E research airplanes under transient aerodynamic heating condi-tions at speeds up to Mach numbers near Extensive temperature measurements were obtained throughout.The pressure in the air along the upper surface of an aircraft's wing (in flight) is lower than the pressure along the lower surface.

Compare the speed of the air flowing over the wing to that of the air flowing under the wing. Please make your simple down your explanation.The consequence of alterations in force per unit area over a wing is critical in the survey of aeromechanicss, as its belongingss extremely affect the flight.

Pressure is an consequence which occurs when a force is applied on a surface. It is the sum of force moving on a unit country.