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  Partner: UNT Libraries Government Documents Department
 Decade: 1940-1949
 Collection: Technical Report Archive and Image Library
Variations in Oxygen Condition Between Individual Cartridges and Between Cases of Permissible Explosives

Variations in Oxygen Condition Between Individual Cartridges and Between Cases of Permissible Explosives

Date: June 1942
Creator: Rowles, A. P. & Denues, A. R. T.
Description: Report issued by the U.S. Bureau of Mines on the differing conditions of oxygen in explosives. Results from explosives samples with oxygen variations are presented. This report includes tables.
Contributing Partner: UNT Libraries Government Documents Department
Velocity distribution on wing sections of arbitrary shape in compressible potential flow I : symmetric flows obeying the simplified density-speed relation

Velocity distribution on wing sections of arbitrary shape in compressible potential flow I : symmetric flows obeying the simplified density-speed relation

Date: April 1, 1946
Creator: Bers, Lipman
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Velocity distribution on wing sections of arbitrary shape in compressible potential flow II : subsonic symmetric adiabatic flows

Velocity distribution on wing sections of arbitrary shape in compressible potential flow II : subsonic symmetric adiabatic flows

Date: June 1, 1946
Creator: Bers, Lipman
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Velocity distributions on two-dimensional wing-duct inlets by conformal mapping

Velocity distributions on two-dimensional wing-duct inlets by conformal mapping

Date: January 1, 1948
Creator: Perl, W & Moses, H E
Description: The conformal-mapping method of the Cartesian mapping function is applied to the determination of the velocity distribution on arbitrary two-dimensional duct-inlet shapes such as are used in wing installations. An idealized form of the actual wing-duct inlet is analyzed. The effects of leading edge stagger, inlet-velocity ratio, and section lift coefficients on the velocity distribution are included in the analysis. Numerical examples are given and, in part, compared with experimental data.
Contributing Partner: UNT Libraries Government Documents Department
Velocity gained and altitude lost in recoveries from inclined flight paths

Velocity gained and altitude lost in recoveries from inclined flight paths

Date: October 1, 1941
Creator: Pearson, H A & Garvin, J B
Description: A series of charts is given showing the variation of the velocity gained and the altitude lost in dive pullouts with the initial indicated air speed and the dive angle. The effects of the maximum load factor, the drag parameter K, the initial altitude, and the type of recovery on the velocity gained and the altitude lost are also considered. The results were obtained from a step-by-step solution of the equations of motion in which mean values of the air density and the airplane drag coefficient were used. The load-factor variation with time is arbitrarily specified in various ways to simulate pull-out procedures, some of which might be encountered in flight.
Contributing Partner: UNT Libraries Government Documents Department
Venturi Tube with Varying Mass Flow

Venturi Tube with Varying Mass Flow

Date: March 1, 1948
Creator: Regenscheit, B.
Description: Measurements on three tubes with flow regulated by suction at the trainling edge of the tube are described. It was possible to vary the mass of air flowing through the tube over a large range. Such tubes could be used for shrouded propellers.
Contributing Partner: UNT Libraries Government Documents Department
Vibration of loosely mounted turbine blades during service operation of a turbojet engine with centrifugal compressor and straight-flow combustion chambers

Vibration of loosely mounted turbine blades during service operation of a turbojet engine with centrifugal compressor and straight-flow combustion chambers

Date: November 3, 1949
Creator: Morgan, W C; Kemp, R H & Manson, S S
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Vibration of turbine blades in a turbojet engine during operation

Vibration of turbine blades in a turbojet engine during operation

Date: April 22, 1948
Creator: Morgan, W C; Kemp, R H & Manson, S S
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Vibration-response tests of a 1/5-scale model of the Grumman F6F airplane in the Langley 16-foot high-speed tunnel

Vibration-response tests of a 1/5-scale model of the Grumman F6F airplane in the Langley 16-foot high-speed tunnel

Date: November 1, 1944
Creator: Regier, Arthur A
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Vibration survey of blades in 10-stage axial-flow compressor I : static investigation

Vibration survey of blades in 10-stage axial-flow compressor I : static investigation

Date: January 31, 1949
Creator: Meyer, Andre J , Jr & Calvert, Howard F
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Vibration Survey of Blades in 19XB Axial-Flow Compressor, 2, Dynamic Investigation

Vibration Survey of Blades in 19XB Axial-Flow Compressor, 2, Dynamic Investigation

Date: April 9, 1947
Creator: Meyer, Andre J., Jr. & Calvert, Howard F.
Description: Strain-gage measurements were taken under operating conditions from blades of various stages of the 19XB axial-flow compressor in an effort to determine the reason for failures in the seventh and tenth stages. First bending-mode vibrations were detected in the first five stages of the compressor caused by each integral multiple of rotor speed from three through ten. Lead-wire failures in the last five stages resulted in incomplete data. The dynamic-vibration frequencies at various rotor speeds were compared with statically measured frequencies analytically corrected for the influence of centrifugal force. Large increases in vibration ani~litude with increased pressure ratio were observed. During surging operation, blade vibrations were not present. The effects of pressure ratio and surge indicate the existence of aerodynamic excitation as the cause of the blade vibrations.
Contributing Partner: UNT Libraries Government Documents Department
Vibration Survey of Blades in 19XB Axial-Flow Compressor, 3, Preliminary Engine Investigation

Vibration Survey of Blades in 19XB Axial-Flow Compressor, 3, Preliminary Engine Investigation

Date: January 28, 1948
Creator: Meyer, Andre J., Jr. & Calvert, Howard F.
Description: Strain gages were used to measure blade vibrations possibly causing failure in the 10-stage compressor of the 19XB jet-propulsion engine. The seventh and tenth stages were of great concern as a result of failures experienced by the manufacturer. Strain-gage records were obtained from all stages during acceleration, deceleration, and constant speed runs. Curves are presented herein showing the maximum allowable vibratory stress for a given speed, the change of the damping coefficient with the mounting of a strain gage at the base of the blade, the effect of rotor speed, on blade natural frequency, and the effect of the order of first bending-mode vibration on stress. It was found that for all stages the lower the order of vibration the higher the stress but no destructive vibrations were detected.
Contributing Partner: UNT Libraries Government Documents Department
Vibration survey of NACA 24-inch supersonic axial-flow compressor

Vibration survey of NACA 24-inch supersonic axial-flow compressor

Date: July 30, 1948
Creator: Meyer, Andre J , Jr & Hanson, Morgan P
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Vibration surveys of the P-40 rudder and fin-rudder assembly

Vibration surveys of the P-40 rudder and fin-rudder assembly

Date: January 1, 1943
Creator: Regier, Arthur A
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Vibration surveys of the P-47-B rudder and fin-rudder assembly

Vibration surveys of the P-47-B rudder and fin-rudder assembly

Date: April 1, 1943
Creator: Regier, Arthur A
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Vibrational modes of several hollow turbine blades and of solid turbine blade of similar aerodynamic design

Vibrational modes of several hollow turbine blades and of solid turbine blade of similar aerodynamic design

Date: October 3, 1949
Creator: Kemp, R H & Shifman, J
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Video Amplifier & Scope

Video Amplifier & Scope

Date: 1945
Creator: Titterton, E. W.
Description: Technical drawing of video amplifiers for nuclear reactors.
Contributing Partner: UNT Libraries Government Documents Department
Visual observations of the shock wave in flight

Visual observations of the shock wave in flight

Date: May 24, 1948
Creator: Rathert, George A , Jr & Cooper, George E
Description: None
Contributing Partner: UNT Libraries Government Documents Department
A visual photographic study of cylinder lubrication

A visual photographic study of cylinder lubrication

Date: January 1, 1946
Creator: Shaw, Milton C & Nussdorfer, Theodore
Description: A V-type engine provided with a glass cylinder was used to study visually the lubrication characteristics of an aircraft-type piston. Photographs and data were obtained with the engine motored at engine speeds up to 1000 r.p.m. and constant cylinder-head pressures of 0 and 50 pounds per square inch. A study was made of the orientation of the piston under various operating conditions, which indicated that the piston was inclined with the crown nearest the major-thrust cylinder face throughout the greater part of the cycle. The piston moved laterally in the cylinder under the influence of piston side thrust.
Contributing Partner: UNT Libraries Government Documents Department
Visual studies of cylinder lubrication I : the lubrication of the piston skirt

Visual studies of cylinder lubrication I : the lubrication of the piston skirt

Date: September 1, 1945
Creator: Nussdorfer, Theodore
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Voltera's solution of the wave equation as applied to three-dimensional supersonic airfoil problems

Voltera's solution of the wave equation as applied to three-dimensional supersonic airfoil problems

Date: September 1, 1947
Creator: Heslet, Max A; Lomax, Harvard & Jones, Arthur L
Description: A surface integral is developed which yields solutions of the linearized partial differential equation for supersonic flow. These solutions satisfy boundary conditions arising in wing theory. Particular applications of this general method are made, using acceleration potentials, to flat surfaces and to uniformly loaded lifting surfaces. Rectangular and trapezoidal plan forms are considered along with triangular forms adaptable to swept-forward and swept-back wings. The case of the triangular plan form in sideslip is also included. Emphasis is placed on the systematic application of the method to the lifting surfaces considered and on the possibility of further application.
Contributing Partner: UNT Libraries Government Documents Department
Wake measurements behind a wing section of a fighter airplane in fast dives

Wake measurements behind a wing section of a fighter airplane in fast dives

Date: March 1, 1947
Creator: Beeler, De E & Gerard, George
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Wake studies of eight model propellers

Wake studies of eight model propellers

Date: July 1, 1946
Creator: Reid, Elliott G
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Wall interference in a two-dimensional-flow wind tunnel with consideration of the effect of compressibility

Wall interference in a two-dimensional-flow wind tunnel with consideration of the effect of compressibility

Date: January 1, 1944
Creator: Vincenti, Walter G
Description: None
Contributing Partner: UNT Libraries Government Documents Department