Resource Type
Collection
Technical Report Archive and Image Library
155
National Advisory Committee for Aeronautics Collection
124
USDA Farmers' Bulletins
11
Government Documents A to Z Digitization Project
7
Texas Soil Surveys
6
USGS Topographic Map Collection
4
Texas State Publications
3
Texas Senate Journals
3
Texas House of Representatives Journals
2
Boy and Girl Scout Annual Reports
1
4 More
Serial/Series Title
NACA Technical Reports
46
NACA Technical Notes
33
NACA Technical Memorandums
29
United States Bureau of Mines Reports
16
United States Geological Survey Reports
13
NACA Aircraft Circulars
11
Farmers' bulletin (United States. Dept. of Agriculture)
10
Shorter contributions to general geology
7
43rd Legislature of Texas
5
Geological Survey bulletin
5
35 More
States
190 Matching Results
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1 - 24 of
190
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The Aachen Wind-Tunnel Balance
Report discussing a description of the balance in the Aachen wind-tunnel.
Date:
November 1934
Creator:
Wieselsberger, C.
Object Type:
Report
System:
The UNT Digital Library
Accounting System and Office-Management Procedure for Medium-Size Metal Mines
Report discussing an accounting system and management of office procedures design for medium-size metal mines, offered by the United States Bureau of Mines, to be more efficient in the mining industry.
Date:
1934
Creator:
Keller, Albert E.
Object Type:
Report
System:
The UNT Digital Library
Additional Test Data on Static Longitudinal Stability
From Summary: "The purpose of this investigation was to explore the influence of weights of the controls on the stability with elevator released. The available test data were extended to stability with elevator locked. In this connection the study of the propeller effect seemed of vital importance."
Date:
August 1934
Creator:
Hübner, Walter
Object Type:
Report
System:
The UNT Digital Library
An Aerodynamic Analysis of the Autogiro Rotor With a Comparison Between Calculated and Experimental Results
This report presents an extension of the autogiro theory of Glauert and Lock in which the influence of a pitch varying with the blade radius is evaluated and methods of approximating the effect of blade tip losses and the influence of reversed velocities on the retreating blades are developed. A comparison of calculated and experimental results showed that most of the rotor characteristics could be calculated with reasonable accuracy, and that the type of induced flow assumed has a secondary effect upon the net rotor forces, although the flapping motion is influenced appreciably. An approximate evaluation of the effect of parasite drag on the rotor blades established the importance of including this factor in the analysis.
Date:
January 17, 1934
Creator:
Wheatley, John B.
Object Type:
Report
System:
The UNT Digital Library
The Aerodynamic Analysis of the Gyroplane Rotating-Wing System
"An aerodynamic analysis of the gyroplane rotating-wing system is presented herein. This system consists of a freely rotating rotor in which opposite blades are rigidly connected and allowed to rotate or feather freely about their span axis. Equations have been derived for the lift, the lift-drag ratio, the angle of attack, the feathering angles, and the rolling and pitching moments of a gyroplane rotor in terms of its basic parameters" (p. 1).
Date:
March 1934
Creator:
Wheatley, John B.
Object Type:
Report
System:
The UNT Digital Library
Aerodynamic Characteristics of Anemometer Cups
From Introduction: "The investigation was intended to cover the characteristics of individual cups and of similar cups mounted on complete cup wheals. This report treats the static tests run on the individual cups."
Date:
February 1934
Creator:
Brevoort, M. J. & Joyner, U. T.
Object Type:
Report
System:
The UNT Digital Library
Aerodynamic Effects of a Split Flap on the Spinning Characteristics of a Monoplane Model
From Summary: "The investigation described in this report was made to determine the change in aerodynamic forces and moments produced by split flaps in a steady spin. The test were made with the spinning balance in the NACA 5-foot vertical wind tunnel. A low-wing monoplane model was tested with and without the split flaps in 12 spinning attitudes chosen to cover the probable spinning range. The results obtained indicate that the use of split flaps on an airplane is unlikely, in any case, to have much beneficial effect on a spin, and it might make the spin dangerous."
Date:
December 1934
Creator:
Bamber, M. J.
Object Type:
Report
System:
The UNT Digital Library
The aerodynamic effects of wing cut-outs
From Introduction: "The information now available concerning wing cut-outs or applicable to the analysis of their effects is plentiful (references 1 to 7) but too disconnected and unorganized to be of the greatest possible usefulness. In connection with the interference program being conducted in the N.A.C.A. varible-density wind tunnel, an analysis was therefore made of existing material to determine the qualitative effects of the different features of wing cut-outs, and to obtain means of calculating wing characteristics as affected by them."
Date:
1934
Creator:
Sherman, Albert
Object Type:
Report
System:
The UNT Digital Library
Aerodynamic Investigation of a Cup Anemometer
Results of an investigation wherein the change of the normal force coefficient with Reynolds Number was obtained statically for a 15.5-centimeter hemispherical cup.
Date:
July 1934
Creator:
Hubbard, John D. & Brescoll, George P.
Object Type:
Report
System:
The UNT Digital Library
Aerodynamic principles of the direct lifting propeller
From Summary: "The purpose of this report is to make the complicated processes on the direct-lift propeller amenable to analysis and observation. This is accomplished by placing the physical phenomena, starting with the most elementary process, in the foreground, while limiting the mathematical treatment to the most essential in view of the fundamental defects of the theorems. Comparison with model experiments supplements and corroborates the theoretical results."
Date:
January 1934
Creator:
Schrenk, Martin
Object Type:
Report
System:
The UNT Digital Library
Aerodynamic Rolling and Yawing Moments Produced by Floating Wing-Tip Ailerons, as Measured by Spinning Balance
From Summary: "The investigation described in this report was made to determine the effectiveness of floating wing-tip ailerons as an airplane control in the spin. In these tests the ailerons, not being balanced, were set parallel to the axis of rotation, which is probably very nearly the attitude that balanced floating ailerons would assume in a spin. Rolling - and yawing moment coefficients are given as measured for the model with and without the ailerons, and computed values are given for the ailerons alone."
Date:
March 1934
Creator:
Bamber, Millard J.
Object Type:
Report
System:
The UNT Digital Library
Air conditions close to the ground and the effect on airplane landings
This report presents the results of an investigation undertaken to determine the feasibility of making glide landings in gusty air. Wind velocities were measured at several stations between the ground and a height of 51 feet, and flight tests were made to determine the actual influence of gusts on an airplane gliding close to the ground.
Date:
April 3, 1934
Creator:
Thompson, F. L.; Peck, W. C. & Beard, A. P.
Object Type:
Report
System:
The UNT Digital Library
Air flow in a separating laminar boundary layer
Report discussing the speed distribution in a laminar boundary layer on the surface of an elliptic cylinder, of major and minor axes 11.78 and 3.98 inches, respectively, has been determined by means of a hot-wire anemometer. The direction of the impinging air stream was parallel to the major axis. Special attention was given to the region of separation and to the exact location of the point of separation. An approximate method, developed by K. Pohlhausen for computing the speed distribution, the thickness of the layer, and the point of separation, is described in detail; and speed-distribution curves calculated by this method are presented for comparison with experiment.
Date:
December 1, 1934
Creator:
Schubauer, G. B.
Object Type:
Report
System:
The UNT Digital Library
Analyses of Crude Oils From Some Fields of Southern Louisiana
Report issued by the U.S. Bureau of Mines on the studies of crude oil samples collected from southern Louisiana. The properties of each sample are analyzed. This report includes tables.
Date:
November 1934
Creator:
Kraemer, A. J. & Garton, E. L.
Object Type:
Report
System:
The UNT Digital Library
Analysis of 2-Spar Cantilever Wings With Special Reference to Torsion and Load Transference
"This paper deals with the analysis of 2-spar cantilever wings in torsion, taking cognizance of the fact that the spars are not independent, but are interconnected by ribs and other structural members. The principles of interaction are briefly explained, showing that the mutual relief action occurring depends on the "pure torsional stiffness" of the wing cross section. Various practical methods of analysis are outlined" (p. 45).
Date:
April 10, 1934
Creator:
Kuhn, Paul
Object Type:
Report
System:
The UNT Digital Library
An Analysis of Longitudinal Stability in Power-Off Flight With Charts for Use in Design
"This report presents a discussion of longitudinal stability in gliding flight together with a series of charts with which the stability characteristics of any airplane may be readily estimated. The relationships governing stability characteristics are derived from equations of equilibrium referred to moving axes that are tangent and perpendicular to the instantaneous flight path. It is shown that instability of the motion can arise only through an increase of linear and angular momentum in the system during one complete cycle" (p. 289).
Date:
December 13, 1934
Creator:
Zimmerman, Charles H.
Object Type:
Report
System:
The UNT Digital Library
Analysis of Spinning in a Monoplane Wing by the Induction Method as Compared With the Strip Method
The problem of autorotation has been attacked by various authors, in particular Fuchs and Schmidt who applied the so-called strip method which is based upon the assumption that the forces and moments per unit length acting in each section of the wing are equal to those on an infinite cylindrical wing of equal section in an air flow of intensity and direction resulting from the apparent relative motion of this section with respect to the surrounding air. In other words they disregarded the induced velocities, which, however, are of such importance that their omission is bound to result in appreciable errors, as we attempt to prove in this report.
Date:
June 1934
Creator:
Poggi, L.
Object Type:
Report
System:
The UNT Digital Library
Annual Report of the Boy Scouts of America: 1933
Annual report submitted by the Boy Scouts of America to Congress describing highlights from 1933, activities, service, public relations, organizational leadership, and other information about scouting programs.
Date:
April 12, 1934
Creator:
Boy Scouts of America
Object Type:
Report
System:
The Portal to Texas History
Annual Report of the National Advisory Committee for Aeronautics (19th). Administrative Report Including Technical Report Nos. 441 to 474
Report includes the National Advisory Committee for Aeronautics letter of submittal to the President, Congressional report, summaries of the committee's activities and research accomplished, bibliographies, and financial report.
Date:
1934
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Applied Methods and Equipment for Reducing Evaporation Losses of Petroleum and Gasoline
From Scope of Report: "The subject matter in this bulletin is divided as follows: Theory of evaporation; methods of determining evaporation losses; lease operation; transportation and storage of crude petroleum; and evaporation losses of gasoline at the refineries."
Date:
1934
Creator:
Schmidt, Ludwig
Object Type:
Report
System:
The UNT Digital Library
The Avia 51 Commercial Airplane (Czechoslovakian): A Cantilever High-Wing Monoplane
Circular describing the Avia 51 commercial airplane, which is a Czechoslovakian cantilever high-wing monoplane with a fairly orthodox design. Details of the performance, construction, wing, ailerons, fuselage, landing gear, engines, characteristics, drawings, and photographs are provided.
Date:
February 1934
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Avro 642 Commercial Airplane (British): A High-Wing Cantilever Monoplane
Circular describing the Avro 642, which is a mixed construction high-wing cantilever monoplane. Details of the engines, controls, interior, wings, cockpit, ailerons, landing gear, characteristics, performance, drawings, and photographs are provided.
Date:
May 1934
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Avro C.30 Direct-Control Autogiro (British)
Circular describing the Avro C.30 direct-control autogiro. Details of the construction, fuselage, engine mounting, tail, cockpits, rotor system, characteristics, performance, drawings, and photographs are provided.
Date:
September 1934
Creator:
Colson, C. N.
Object Type:
Report
System:
The UNT Digital Library
The Avro "Commodore" Touring Airplane (British): A Cabin Biplane
Circular describing the Avro Commodore, which is a cabin biplane of metal construction that is designed for comfort rather than performance. Details regarding the fuselage, wings, landing gear, controls, characteristics, drawings, and photographs are provided.
Date:
July 1934
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library