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 Decade: 1940-1949
 Collection: National Advisory Committee for Aeronautics Collection
Determination of rate, area, and distribution of impingement of waterdrops on various airfoils from trajectories obtained on the differential analyzer

Determination of rate, area, and distribution of impingement of waterdrops on various airfoils from trajectories obtained on the differential analyzer

Date: February 16, 1949
Creator: Guibert, A. G.; Janssen, E. & Robbins, W. M.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Moments of cambered round bodies

Moments of cambered round bodies

Date: August 1, 1949
Creator: Kempf, Gunther
Description: Results are presented for the moments and position of force centers of a series of cambered round bodies derived from a torpedo-like body of revolution. The effects of placing fins on the rear of the body of revolution are also included.
Contributing Partner: UNT Libraries Government Documents Department
Determination of rate, area, and distribution of impingement of of waterdrops on various airfoils from trajectories obtained on the differential analyzer

Determination of rate, area, and distribution of impingement of of waterdrops on various airfoils from trajectories obtained on the differential analyzer

Date: February 16, 1949
Creator: Guibert, A. G.; Janssen, E. & Robbins, W. M.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Effects of Ice Formations on Airplane Performance in Level Cruising Flight

Effects of Ice Formations on Airplane Performance in Level Cruising Flight

Date: May 1, 1948
Creator: Preston, G. Merritt & Blackman, Calvin C.
Description: A flight investigation in natural icing conditions was conducted by the NACA to determine the effect of ice accretion on airplane performance. The maximum loss in propeller efficiency encountered due to ice formation on the propeller blades was 19 percent. During 87 percent of the propeller icing encounters, losses of 10 percent or less were observed. Ice formations on all of the components of the airplane except the propellers during one icing encounter resulted in an increase in parasite drag of the airplane of 81 percent. The control response of the airplane in this condition was marginal.
Contributing Partner: UNT Libraries Government Documents Department
Wind-tunnel investigation of several factors affecting the performance of a high-speed pursuit airplane with air-cooled radial engine

Wind-tunnel investigation of several factors affecting the performance of a high-speed pursuit airplane with air-cooled radial engine

Date: November 1, 1941
Creator: Wenzinger, C. J.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Preliminary wind-tunnel investigation of the effect of area suction on the laminar boundary layer over an NACA 64A010 airfoil

Preliminary wind-tunnel investigation of the effect of area suction on the laminar boundary layer over an NACA 64A010 airfoil

Date: April 26, 1948
Creator: Braslow, A. L.; Visconti, F. & Burrows, D. L.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
De-icing Effectiveness of External Electric Heaters for Propeller Blades

De-icing Effectiveness of External Electric Heaters for Propeller Blades

Date: February 1, 1948
Creator: Lewis, J. P.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Investigations relating to the extension of laminar flow by means of boundary-layer suction through slots

Investigations relating to the extension of laminar flow by means of boundary-layer suction through slots

Date: October 1, 1949
Creator: Loftin, L. K., Jr. & Burrows, D. L.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Some effects of rainfall on flight of airplanes and on instrument indications

Some effects of rainfall on flight of airplanes and on instrument indications

Date: April 1, 1941
Creator: Rhode, Richard V
Description: Several possible effects of heavy rain on the aerodynamic performance of an airplane and of heavy rain and associated atmospheric phenomena on the indications of flight instruments are briefly considered. It is concluded that the effects of heavy rain on the performance of an airplane are not so great as to force the airplane down from moderate altitudes. Serious malfunctioning of the air-speed indicator may occur, however, as a result of flooding of the pitot-static head and subsequent accumulation of water in the air-speed pressure line. In strong convective situations, like thunderstorms, the rate-of-climb indicator may also be seriously in error owing to rapid variations of atmospheric pressure when entering and emerging from the convection currents.
Contributing Partner: UNT Libraries Government Documents Department
Experimental and theoretical studies of area suction for the control of the laminar boundary layer on a porous bronze NACA 64A010 airfoil

Experimental and theoretical studies of area suction for the control of the laminar boundary layer on a porous bronze NACA 64A010 airfoil

Date: July 1, 1949
Creator: Burrows, D. L.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Flight investigation at high speeds of profile drag of wing of a P-47D airplane having production surfaces covered with camouflage paint

Flight investigation at high speeds of profile drag of wing of a P-47D airplane having production surfaces covered with camouflage paint

Date: March 1, 1946
Creator: Zalovcik, J. A. & Daum, F. L.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Effects of specific types of surface roughness on boundary-layer transition

Effects of specific types of surface roughness on boundary-layer transition

Date: February 1, 1946
Creator: Loftin, L. K., Jr.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Flight investigation of boundary-layer and profile-drag characteristics of smooth wing sections of a P-47D airplane

Flight investigation of boundary-layer and profile-drag characteristics of smooth wing sections of a P-47D airplane

Date: October 1, 1945
Creator: Zalovcik, J. A.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Flight investigation of boundary-layer control by suction slots on an NACA 35-215 low-drag airfoil at high Reynolds numbers

Flight investigation of boundary-layer control by suction slots on an NACA 35-215 low-drag airfoil at high Reynolds numbers

Date: February 1, 1944
Creator: Zalovcik, J. A.; Wetmore, J. W. & Vondoenhoff, A. E.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Flight investigation of boundary-layer transition and profile drag of an experimental low-drag wing installed on a figher-type airplane

Flight investigation of boundary-layer transition and profile drag of an experimental low-drag wing installed on a figher-type airplane

Date: April 1, 1945
Creator: Zalovcik, J. A. & Skoog, R. B.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Wind-tunnel investigation of the effect of tab balance on tab and control-surface characteristics

Wind-tunnel investigation of the effect of tab balance on tab and control-surface characteristics

Date: August 1, 1947
Creator: Brewer, Jack D & Queijo, M J
Description: An investigation was conducted to furnish data on the effect of tab balance on tab and control-surface characteristics. The airfoil tested had a modified NACA 65(1)-012 contour with a plain flap having a chord equal to 25 percent of the wing chord and with a tab having a chord equal to 25 percent of the flap chord and having several nose shapes and overhang lengths. The results of the investigation indicated that, in general, tab balance affected tab hinge-moment characteristics in much the same manner that flap balance affects flap hinge-moment characteristics. A moderate amount of tab balance did not seem to have any adverse effect on flap hinge-moment characteristics.
Contributing Partner: UNT Libraries Government Documents Department
Investigation of boundary-layer Reynolds number for transition on an NACA 65 sub (215) sup-114 airfoil in the Langley two-dimensional low-turbulence pressure tunnel

Investigation of boundary-layer Reynolds number for transition on an NACA 65 sub (215) sup-114 airfoil in the Langley two-dimensional low-turbulence pressure tunnel

Date: October 1, 1948
Creator: Braslow, A. L. & Visconti, F.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Introduction to the problem of rocket-powered aircraft performance

Introduction to the problem of rocket-powered aircraft performance

Date: December 1, 1947
Creator: Ivey, H Reese; Bowen, Edward N JR & Oborny, Lester F
Description: An introduction to the problem of determining the fundamental limitations on the performance possibilities of rocket-powered aircraft is presented. Previous material on the subject is reviewed and given in condensed form along with supplementary analyses. Some of the problems discussed are: 1) limiting velocity of a rocket projectile; 2) limiting velocity of a rocket jet; 3) jet efficiency; 4) nozzle characteristics; 5) maximum attainable altitudes; 6) ranges. Formulas are presented relating the performance of a rocket-powered aircraft to basic weight and nozzle dimensional parameters. The use of these formulas is illustrated by their application to the special case of a nonlifting rocket projectile.
Contributing Partner: UNT Libraries Government Documents Department
Investigation at low speeds of the effect of aspect ratio and sweep on rolling stability derivatives of untapered wings

Investigation at low speeds of the effect of aspect ratio and sweep on rolling stability derivatives of untapered wings

Date: March 1, 1949
Creator: Goodman, Alex & Fisher, Lewis R.
Description: A low scale wind tunnel investigation was conducted in rolling flow to determine the effects of aspect ratio and sweep (when varied independently) on the rolling stability derivatives for a series of untapered wings. Test results indicate that when the aspect ratio was held constant, an increase in the sweepback angle caused a significant reduction in the damping in roll at low lift coefficients for only the higher aspect ratios that were tested. This result was in agreement with available swept wing theory which indicated no effect of sweep for aspect ratios near zero. The result of the linear theory that the damping in roll is independent of lift coefficient and that the yawing moment and lateral force due to rolling are directly proportional to the lift coefficient was found to be valid for only a very limited lift coefficient range when the wings were highly swept. For such wings, the damping was found to increase in magnitude and the yawing moment due to rolling, to change from negative to positive at moderate lift coefficients. The effect of wing tip suction, not acounted for by present theory, was found to be very important with regard to the yawing moment due ...
Contributing Partner: UNT Libraries Government Documents Department
NACA Confidential Bulletins

NACA Confidential Bulletins

Date: July 1, 1944
Creator: Braslow, A. L.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
A profile-drag investigation in flight on an experimental fighter-type airplane the North American XP-51

A profile-drag investigation in flight on an experimental fighter-type airplane the North American XP-51

Date: January 1, 1942
Creator: Zalovcik, J. A.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
High-altitude cooling. III : Radiators

High-altitude cooling. III : Radiators

Date: September 1, 1944
Creator: Nielsen, Jack Norman
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Flight tests of the high-speed performance of a P-51B airplane (AAF no. 43-12105)

Flight tests of the high-speed performance of a P-51B airplane (AAF no. 43-12105)

Date: December 18, 1944
Creator: Voglewede, T. J. & Danforth, E. C. D.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
NACA: University Conference on Aerodynamics, A Compilation of the Papers Presented

NACA: University Conference on Aerodynamics, A Compilation of the Papers Presented

Date: January 1, 1948
Creator: unknown
Description: This document contains reproductions of the technical papers presented at the NACA - University Conference on Aerodynamics held at the Langley Aeronautical Laboratory on June 21, 22, and 23, 1948. The conference was held in recognition of the difficulties, imposed by security restrictions, in keeping abreast of the rapid advances in aerodynamics. The papers were prepared to review the status of a number of fields of interest, to summarize the more important wartime advances that are no longer classified, and to orient reference material for further study. The papers in this document are in the same form in which they were presented at the conference so that distribution of them might be prompt. The original presentation and this record are considered as complementary to, rather than as substitutes for, the Committee?s system of complete and formal reports.
Contributing Partner: UNT Libraries Government Documents Department
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