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 Decade: 1930-1939
 Collection: National Advisory Committee for Aeronautics Collection
The Design of Airplane-engine Superchargers

The Design of Airplane-engine Superchargers

Date: October 1, 1937
Creator: Von Der Null, W.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Hydrodynamic and aerodynamic tests of a family of models of seaplane floats with varying angles of dead rise

Hydrodynamic and aerodynamic tests of a family of models of seaplane floats with varying angles of dead rise

Date: July 1, 1939
Creator: Parkinson, John B.; Olson, Roland E. & House, Rufus O.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Determination of the profile drag of an airplane wing in flight at high Reynolds numbers

Determination of the profile drag of an airplane wing in flight at high Reynolds numbers

Date: January 1, 1939
Creator: Bicknell, J.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The effect of curvature on the transition from laminar to turbulent boundary layer

The effect of curvature on the transition from laminar to turbulent boundary layer

Date: September 1, 1937
Creator: Clauser, M. & Clauser, F.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
An Application of the Von Karman-millikan Laminar Boundary-layer Theory and Comparison With Experiment

An Application of the Von Karman-millikan Laminar Boundary-layer Theory and Comparison With Experiment

Date: October 1, 1935
Creator: Doenhoff, A. E. V.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Strength tests on thin-walled duralumin cylinders in torsion

Strength tests on thin-walled duralumin cylinders in torsion

Date: August 1, 1932
Creator: Lundquist, Eugene E
Description: This report is the first of a series presenting the results of strength tests on thin-walled cylinders and truncated cones of circular and elliptical section; it comprises the results obtained to date from torsion (pure shear) tests on 65 thin-walled duralumin cylinders of circular section with ends clamped to rigid bulkheads. The effect of variations in the length/radius and radius/thickness ratios on the type of failure is indicated, and a semi-empirical equation for the shearing stress at maximum load is given.
Contributing Partner: UNT Libraries Government Documents Department
Strength tests on paper cylinder in compression, bending and shear

Strength tests on paper cylinder in compression, bending and shear

Date: April 1, 1931
Creator: Rhodes, Richard V & Lundquist, Eugene E
Description: Static tests on paper cylinders were conducted at the Langley Memorial Aeronautical Laboratory at Langley Field, Virginia, to obtain qualitative information in connection with a study of the strength of stressed-skin fuselages. The effects of radius-thickness ratio and bulkhead spacing were investigated with the cylinders in compression, bending, combined bending and shear, and torsion.
Contributing Partner: UNT Libraries Government Documents Department
Some effects of air and fuel oil temperatures on spray penetration and dispersion

Some effects of air and fuel oil temperatures on spray penetration and dispersion

Date: May 1, 1930
Creator: Gelalles, A G
Description: Presented here are experimental results obtained from a brief investigation of the appearance, penetration, and dispersion of oil sprays injected into a chamber of highly heated air at atmospheric pressure. The development of single sprays injected into a chamber containing air at room temperature and at high temperature was recorded by spray photography equipment. A comparison of spray records showed that with the air at the higher temperature, the spray assumed the appearance of thin, transparent cloud, the greatest part of which rapidly disappeared from view. With the chamber air at room temperature, a compact spray with an opaque core was obtained. Measurements of the records showed a decrease in penetration and an increase in the dispersion of the spray injected into the heated air. No ignition of the fuel injected was observed or recorded until the spray particles came in contact with the much hotter walls of the chamber about 0.3 second after the start of injection.
Contributing Partner: UNT Libraries Government Documents Department
The nature of air flow about the tail of an airplane in a spin

The nature of air flow about the tail of an airplane in a spin

Date: May 1, 1932
Creator: Scudder, N F & Miller, M P
Description: Air flow about the fuselage and empennage during a high-angle-of-attack spin was made visible in flight by means of titanium-tetrachloride smoke and was photographed with a motion-picture camera. The angular relation of the direction of the smoke streamer to the airplane axes was computed and compared with the angular direction of the motion in space derived from instrument measurement of the spin of the airplane for a nearly identical mass distribution. The results showed that the fin and upper part of the rudder were almost completely surrounded by dead air, which would render them inoperative; that the flow around the lower portion of the rudder and the fuselage was nonturbulent; and that air flowing past the cockpit in a high-angle-of-attack spin could not subsequently flow around control surfaces.
Contributing Partner: UNT Libraries Government Documents Department
Tests of six symmetrical airfoils in the variable density wind tunnel

Tests of six symmetrical airfoils in the variable density wind tunnel

Date: July 1, 1931
Creator: Jacobs, Eastman N
Description: This paper is the first of a series covering an investigation of a family of airfoils all formed from a basic profile. It gives in preliminary form the results of six symmetrical airfoils, differing only in maximum thickness. The maximum thickness-to-chord ratios are 0.06, 0.09, 0.12, 0.15, 0.18, and 0.21.
Contributing Partner: UNT Libraries Government Documents Department
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