This system will be undergoing maintenance Tuesday, May 5, 2015 from 10:00 AM to 11:00 AM CDT.

  You limited your search to:

 Decade: 1940-1949
 Year: 1947
 Collection: National Advisory Committee for Aeronautics Collection
Icing properties of noncyclonic winter stratus clouds

Icing properties of noncyclonic winter stratus clouds

Date: September 1, 1947
Creator: Lewis, W.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Theoretical investigation of drag reduction in maintaining the laminar boundary layer by suction

Theoretical investigation of drag reduction in maintaining the laminar boundary layer by suction

Date: June 1, 1947
Creator: Ulrich, A.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Wind-tunnel investigation of icing of an engine cooling-fan installation

Wind-tunnel investigation of icing of an engine cooling-fan installation

Date: April 1, 1947
Creator: Lewis, J. P.
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
Effects of sweepback on boundary layer and separation

Effects of sweepback on boundary layer and separation

Date: July 1, 1947
Creator: Jones, Robert T
Description: Following the law of stress adopted in the Navier-Stokes equations, the configuration of the viscous flow in planes at right angles to the axis of an infinite cylinder is found to be independent of the axial motion of the cylinder. In the limiting case of a yawed or swept wing of very high aspect ratio, certain boundary-layer and separation phenomena are thus determined independently by the crosswise component of velocity.
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
Elastic properties in tension and shear of high strength nonferrous metals and stainless steel - effect of previous deformation and heat treatment

Elastic properties in tension and shear of high strength nonferrous metals and stainless steel - effect of previous deformation and heat treatment

Date: March 1, 1947
Creator: Mebs, R W & Mcadam, D J
Description: A resume is given of an investigation of the influence of plastic deformation and of annealing temperature on the tensile and shear elastic properties of high strength nonferrous metals and stainless steels in the form of rods and tubes. The data were obtained from earlier technical reports and notes, and from unpublished work in this investigation. There are also included data obtained from published and unpublished work performed on an independent investigation. The rod materials, namely, nickel, monel, inconel, copper, 13:2 Cr-Ni steel, and 18:8 Cr-Ni steel, were tested in tension; 18:8 Cr-Ni steel tubes were tested in shear, and nickel, monel, aluminum-monel, and Inconel tubes were tested in both tension and shear. There are first described experiments on the relationship between hysteresis and creep, as obtained with repeated cyclic stressing of annealed stainless steel specimens over a constant load range. These tests, which preceded the measurements of elastic properties, assisted in devising the loading time schedule used in such measurements. From corrected stress-set curves are derived the five proof stresses used as indices of elastic or yield strength. From corrected stress-strain curves are derived the secant modulus and its variation with stress. The relationship between the forms of the ...
Contributing Partner: UNT Libraries Government Documents Department
The calculation of the heat required for wing thermal ice prevention in specified icing conditions

The calculation of the heat required for wing thermal ice prevention in specified icing conditions

Date: December 1, 1947
Creator: Neel, C. B., Jr.; Bergrun, N. R.; Jukoff, D. & Schlaff, B. A.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Tests of the landing on water of a model of a high-speed airplane - langley tank model 229

Tests of the landing on water of a model of a high-speed airplane - langley tank model 229

Date: December 9, 1947
Creator: King, D. A.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Systematic wind-tunnel measurements on a laminar wing with nose flap

Systematic wind-tunnel measurements on a laminar wing with nose flap

Date: April 1, 1947
Creator: Krueger, W.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
FIRST PREV 1 2 3 4 5 NEXT LAST