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13,786 Matching Results
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Spin Tunnel Investigation of a 1/30 Scale Model of the North American A-5A Airplane
"An investigation has been made in the Langley spin tunnel to determine the erect and inverted spin and recovery characteristics of a 1/30-scale dynamic model of the North American A-5A airplane. Tests were made for the basic flight design loading with the center of gravity at 30-percent mean aerodynamic chord and also for a forward position and a rearward position with the center of gravity at 26-percent and 40-percent mean aerodynamic chord, respectively. Tests were also made to determine the effect of full external wing tanks on both wings, and of an asymmetrical condition when only one full tank is carried" (p. 1).
Date:
June 1964
Creator:
Lee, Henry A.
Object Type:
Report
System:
The UNT Digital Library
Spin-Tunnel Investigation of a 1/28-Scale Model of a Subsonic Attack Airplane
"An investigation has been made of a 1/28-scale model of the Grumman A-6A airplane in the Langley spin tunnel. The erect spin and recovery characteristics of the model were determined for the flight design gross weight loading and for a loading with full internal fuel and empty external wing fuel tanks. The effects of extending slats and deflecting flaps were investigated" (p. 1).
Date:
July 1964
Creator:
Lee, Henry A. & Healy, Frederick M.
Object Type:
Report
System:
The UNT Digital Library
Smoking Characteristics of Various Fuels as Determined by Open-Cup and Laboratory-Burner Smoke Tests
Report discussing tests in a combustion chamber to obtain smoking characteristics data on a variety of hydrocarbon fuels. Details about the smoking tendencies and burning rates of the fuels in uncontrolled and controlled tests are provided.
Date:
{1945-06,1945-09}
Creator:
Ebersole, Earl R. & Barnett, Henry C.
Object Type:
Report
System:
The UNT Digital Library
The Aerodynamic Forces on Airship Hulls
The new method for making computations in connection with the study of rigid airships, which was used in the investigation of Navy's ZR-1 by the special subcommittee of the National Advisory Committee for Aeronautics appointed for this purpose is presented. The general theory of the air forces on airship hulls of the type mentioned is described and an attempt was made to develop the results from the very fundamentals of mechanics.
Date:
1979%
Creator:
Munk, Max M.
Object Type:
Report
System:
The UNT Digital Library
Applications of Modern Hydrodynamics to Aeronautics Part 1: Fundamental Concepts and the Most Important Theorems. Part 2: Applications
A discussion of the principles of hydrodynamics of nonviscous fluids in the case of motion of solid bodies in a fluid is presented. Formulae are derived to demonstrate the transition from the fluid surface to a corresponding 'control surface'. The external forces are compounded of the fluid pressures on the control surface and the forces which are exercised on the fluid by any solid bodies which may be inside of the control surfaces.
Date:
1979%
Creator:
Prandtl, L.
Object Type:
Report
System:
The UNT Digital Library
Flow and Drag Formulas for Simple Quadrics
The pressure distribution and resistance found by theory and experiment for simple quadrics fixed in an infinite uniform stream of practically incompressible fluid are calculated. The experimental values pertain to air and some liquids, especially water; the theoretical refer sometimes to perfect, again to viscid fluids. Formulas for the velocity at all points of the flow field are given. Pressure and pressure drag are discussed for a sphere, a round cylinder, the elliptic cylinder, the prolate and oblate spheroid, and the circular disk. The velocity and pressure in an oblique flow are examined.
Date:
December 1979
Creator:
Zahm, A. F.
Object Type:
Report
System:
The UNT Digital Library
Flow and Force Equations for a Body Revolving in a Fluid
A general method for finding the steady flow velocity relative to a body in plane curvilinear motion, whence the pressure is found by Bernoulli's energy principle is described. Integration of the pressure supplies basic formulas for the zonal forces and moments on the revolving body. The application of the steady flow method for calculating the velocity and pressure at all points of the flow inside and outside an ellipsoid and some of its limiting forms is presented and graphs those quantities for the latter forms.
Date:
December 1979
Creator:
Zahm, A. F.
Object Type:
Report
System:
The UNT Digital Library
Graphic Construction of Joukowski Wings
Memorandum presenting a description and formulas that can be used to plot the cross-sectional outline of a Joukowski wing.
Date:
1979-12?
Creator:
Trefftz, E.
Object Type:
Report
System:
The UNT Digital Library
The Minimum Induced Drag of Aerofoils
Equations are derived to demonstrate which distribution of lifting elements result in a minimum amount of aerodynamic drag. The lifting elements were arranged (1) in one line, (2) parallel lying in a transverse plane, and (3) in any direction in a transverse plane. It was shown that the distribution of lift which causes the least drag is reduced to the solution of the problem for systems of airfoils which are situated in a plane perpendicular to the direction of flight.
Date:
1979-12?
Creator:
Munk, Max M.
Object Type:
Report
System:
The UNT Digital Library
The Theory of the Pitot and Venturi Tubes, Part 2
Report discussing several aspects of pitot and venturi tubes, including the energy equation for steady adiabatic flow, introduction of mean speed into the energy equation, isentropic flow of an ideal gas, the theory of the pitot tube, and the theory of the venturi meter.
Date:
1989?
Creator:
Buckingham, E.
Object Type:
Report
System:
The UNT Digital Library