Air-consumption parameters for automatic mixture control of aircraft engines (open access)

Air-consumption parameters for automatic mixture control of aircraft engines

From Introduction: "The purpose of this analysis was to investigate the use of function of intake-manifold temperature and pressure, exhaust back pressure, and engine speed in place of a ventri as a means of measuring engine air consumption and to determine if this function is suitable for automatic mixture control."
Date: September 1944
Creator: Shames, Sidney J.
System: The UNT Digital Library
Analysis and Calculation by Integral Methods of Laminar Compressible Boundary-Layer With Heat Transfer and With and Without Pressure Gradient (open access)

Analysis and Calculation by Integral Methods of Laminar Compressible Boundary-Layer With Heat Transfer and With and Without Pressure Gradient

From Introduction: "The purpose of the present report is to present a comprehensive summary of theoretical investigations of comprehensible laminar boundary layers which have been carried out since 1949 at the Polytechnic Institute of Brooklyn under the sponsorship and with the financial assistance of the National Advisory Committee for Aeronautics. The results of these investigations are contained primarily in references 1 to 7."
Date: April 12, 1955
Creator: Morduchow, Morris
System: The UNT Digital Library
Aerodynamic characteristics and flying qualities of a tailless triangular-wing airplane configuration as obtained from flights of rocket-propelled models at transonic and supersonic speeds (open access)

Aerodynamic characteristics and flying qualities of a tailless triangular-wing airplane configuration as obtained from flights of rocket-propelled models at transonic and supersonic speeds

Report discussing a flight investigation of rocket-powered models of a tailless triangular-wing airplane configuration was made through the transonic and low supersonic speed range at the Langley Pilotless Aircraft Research Station at Wallops Island, Va. An analysis of the aerodynamic coefficients, stability derivatives, and flying qualities based on the results obtained from the successful flight tests of three models is presented.
Date: November 1956
Creator: Mitcham, Grady L.; Stevens, Joseph E. & Norris, Harry P.
System: The UNT Digital Library
Aerodynamics of slender wings and wing-body combinations having swept trailing edges (open access)

Aerodynamics of slender wings and wing-body combinations having swept trailing edges

From Introduction: "In the present paper, a general method is developed for solving low-aspect-ratio problems involving shed vortex sheets. Both direct and inverse problems are considered. The method is applicable for all planar problems where the velocity boundary conditions can be made homogeneous by differentiation in either the streamwise or the spanwise directions."
Date: March 1954
Creator: Mirels, Harold
System: The UNT Digital Library
An analytical investigation of airplane spin-recovery motion by use of rotary-balance aerodynamic data (open access)

An analytical investigation of airplane spin-recovery motion by use of rotary-balance aerodynamic data

From Introduction: "Many investigations have been made in the Langley 20-foot free-spinning tunnel in which the natures of airplane spins and recoveries have been determined experimentally with dynamically scaled-down models. The results of some of these investigations are presented in references 1 to 5."
Date: June 1954
Creator: Scher, Stanley H.
System: The UNT Digital Library
Analytical investigation of acceleration restriction in a fighter airplane with an automatic control system (open access)

Analytical investigation of acceleration restriction in a fighter airplane with an automatic control system

From Introduction: "In the present report, consideration is given to certain features intended to improve the accleration-limiting characteristics of a normal-accleration control system."
Date: January 1958
Creator: Matthews, James T., Jr.
System: The UNT Digital Library
Abnormal grain growth in nickel-base heat-resistant alloys (open access)

Abnormal grain growth in nickel-base heat-resistant alloys

From Introduction: "The data included in this report for Nimonic 80A alloy, for instance, represent experiments carried out to help clarify a production problem of grain-size control in an alloy which has been extensively used. The general procedure of the investigation was to carry out controlled laboratory experiments on samples of bar stock to find conditions of heating and hot-working which resulted in abnormal grain growth."
Date: December 1957
Creator: Decker, R. F.; Rush, A. I.; Dano, A. G. & Freeman, J. W.
System: The UNT Digital Library
An Analysis of Ramjet Engines Using Supersonic Combustion (open access)

An Analysis of Ramjet Engines Using Supersonic Combustion

From Introduction: "The concept of supersonic combustion is by no means new, although little work appears to have been published on the subject. For example, an analysis of supersonic combustion to provide lift under a wing is given in reference 1. Reference 2 discusses applications to hypersonic ramjets being studied at the University of Michigan."
Date: September 1958
Creator: Weber, Richard J. & MacKay, John S.
System: The UNT Digital Library
An Analytical Investigation of the Effect of the Rate of Increase of Turbulent Kinetic Energy in the Stream Direction on the Development of Turbulent Boundary Layers in Adverse Pressure Gradients (open access)

An Analytical Investigation of the Effect of the Rate of Increase of Turbulent Kinetic Energy in the Stream Direction on the Development of Turbulent Boundary Layers in Adverse Pressure Gradients

"The purpose of this paper is to provide a derivation of the general integral form of the boundary equation without neglecting the Reynolds normal-stress term. Two special cases of this equation are given explicitly" (p. 2).
Date: November 1953
Creator: Rashis, Bernard
System: The UNT Digital Library
An Analysis of the Transition of a Helicopter From Hovering to Steady Autorotative Vertical Descent (open access)

An Analysis of the Transition of a Helicopter From Hovering to Steady Autorotative Vertical Descent

"This report is the second phase of a broad program of study of the transient motions of helicopters in autorotative flight. The first phase (reference 1) dealt with the steady-state condition of autorotative vertical descent. This report is concerned with the the transition from the steady condition of hovering to the steady autorotative descent" (p. 1).
Date: June 1949
Creator: Nikolsky, A. A. & Seckel, Edward
System: The UNT Digital Library
Airplane performance, past and present (open access)

Airplane performance, past and present

Report discussing the progress of airplane performance and measured by speed.
Date: December 1922
Creator: Warner, Edward P.
System: The UNT Digital Library
An analysis of the airspeeds and normal accelerations of Douglas DC-3 airplanes in commercial transport operation (open access)

An analysis of the airspeeds and normal accelerations of Douglas DC-3 airplanes in commercial transport operation

From Introduction: "The present report is the second prepared to give the results of an analysis of V-G data from commercial transport airplanes. The present report is concerned with an analysis of data obtained with Douglas DC-3 airplanes flying over three transcontinental routes in the United States."
Date: September 1946
Creator: Peiser, A. M.
System: The UNT Digital Library
Apparent Effect of Inlet Temperature on Adiabatic Efficiency of Centrifugal Compressors (open access)

Apparent Effect of Inlet Temperature on Adiabatic Efficiency of Centrifugal Compressors

From Introduction: "The results of varying only Reynolds number for several equivalent tip speeds are presented and probable reasons for the apparent variation of adiabatic efficiency with inlet temperature are discussed."
Date: February 1948
Creator: Anderson, Robert J.; Ritter, William K. & Parsons, Shirley R.
System: The UNT Digital Library
An analysis of the airspeeds and normal accelerations of Martin M-130 airplanes in commercial transport operation (open access)

An analysis of the airspeeds and normal accelerations of Martin M-130 airplanes in commercial transport operation

From Introduction: "Acceleration and airspeed data obtained from V-G records collected during commercial transport operations (references 1 and 2) are being analyzed in some detail to determine the flight loads and operating speeds as functions of airplane, route, season, and prewar and wartime operations."
Date: September 1948
Creator: Walker, Walter G.
System: The UNT Digital Library
An Analysis of the Variation With Altitude of Effective Gust Velocity in Convective-Type Clouds (open access)

An Analysis of the Variation With Altitude of Effective Gust Velocity in Convective-Type Clouds

From Introduction: "In the present paper, the variation of effective gust velocity in convective-type clouds with altitude is investigated. Data obtained during 1941 and 1942 at altitudes up to 34,000 feet and data obtained more recently from the Thunderstorm Project (reference 5) at altitudes up to 26,000 feet are utilized for this purpose. Consideration is given in analyzing the results both to data for the range
Date: June 1948
Creator: Tolefson, H. B.
System: The UNT Digital Library
Compressive Strength of Tapered Airplane Struts (open access)

Compressive Strength of Tapered Airplane Struts

Note presenting methods for ascertaining the value of n in Euler's simplified formula, which can be used for the compressive strength of tapered airplane struts, by estimating from curves and by calculation.
Date: December 1923
Creator: Lewe, Viktor
System: The UNT Digital Library
Effect of the Reversal of Air Flow Upon the Discharge Coefficient of Durley Orifices (open access)

Effect of the Reversal of Air Flow Upon the Discharge Coefficient of Durley Orifices

Note presenting an experiment to obtain information regarding the relationship between the coefficients for flow in the two directions through an inlet. The results indicate that the ratio of the orifice discharge coefficient from standard orifice to the discharge coefficient from reverse flow is always less than unity, but approaches unity with increasing ratio of box area to orifice area, and that even for a ratio of areas as low as twenty the ratios of the coefficients is not much less than unity.
Date: February 1921
Creator: Ware, Marsden
System: The UNT Digital Library
Analysis of the Ultimate Strength and Optimum Proportions of Multiweb Wing Structures (open access)

Analysis of the Ultimate Strength and Optimum Proportions of Multiweb Wing Structures

From Introduction: "The results are presented in the form of a structural-efficiency chart where minimum structural weight is plotted as a function of the structural index for constant values of the ratio of wing depth to skin thickness."
Date: March 1956
Creator: Rosen, B. Walter
System: The UNT Digital Library
Aerodynamic Measurements Made During Navy Investigation of Human Tolerance to Wind Blasts (open access)

Aerodynamic Measurements Made During Navy Investigation of Human Tolerance to Wind Blasts

From Summary: "This report presents the aerodynamic measurements made during a Navy investigation conducted in the Langley 8-foot high speed tunnel to determine the actual human tolerance to wind blasts."
Date: March 11, 1947
Creator: Loving, Donald L.
System: The UNT Digital Library
Analytical Comparison of a Standard Turbojet Engine, a Turbojet Engine with a Tail-Pipe Burner, and a Ram-Jet Engine (open access)

Analytical Comparison of a Standard Turbojet Engine, a Turbojet Engine with a Tail-Pipe Burner, and a Ram-Jet Engine

From Introduction: "Experimental investigations (reference 1) have shown that in some cases the thrust can be more than doubled by means of tail-pipe burning. A comparison is made of a standard turbojet engine, whose thrust is augmented by tail-pipe burning, and a ram-jet engine. The performance characteristics for the ram-jet engine were computed entirely from theoretical considerations and on the assumption that the burner-inlet velocity was constant."
Date: February 10, 1947
Creator: Krebs, Richard P. & Palasics, John
System: The UNT Digital Library
Evaluation of Gust and Draft Velocities From Flights of an AT-6 Airplane Within Cumulus Clouds July 1, 1947 to July 22, 1947 at Clinton County Army Air Field, Ohio (open access)

Evaluation of Gust and Draft Velocities From Flights of an AT-6 Airplane Within Cumulus Clouds July 1, 1947 to July 22, 1947 at Clinton County Army Air Field, Ohio

Memorandum presenting measurements of gust and draft velocities within cumulus clouds at a certain army air field using an AT-6 airplane. The measurements were made to supplement the at a obtained with P-61C airplanes. The data are summarized in tables.
Date: March 22, 1948
Creator: Funk, Jack
System: The UNT Digital Library
Acoustic radiation from two-dimensional rectangular cutouts in aerodynamic surfaces (open access)

Acoustic radiation from two-dimensional rectangular cutouts in aerodynamic surfaces

From Introduction: "The experiments in high-speed flow showed that an intense, high-frequency acoustic radiation is an essential feature of the problem. Consequently, a study of the acoustic field (involving schlieren observations and frequency and intensity measurements) was undertaken. This report presents the salient features of the study, which was mainly exploratory."
Date: August 1955
Creator: Krishnamurty, K.
System: The UNT Digital Library
Altitude-wind-tunnel investigation of thrust augmentation of a turbojet engine IV: performance with tail-pipe burning and water injection (open access)

Altitude-wind-tunnel investigation of thrust augmentation of a turbojet engine IV: performance with tail-pipe burning and water injection

From Introduction: "Thrust augmentation of an axial-flow-type turbojet engine by burning fuel in the tail pipe is discussed in references 1 to 3. Thrust augmentation of the same turbojet engine by water injection at the compressor inlet is reported in reference 4."
Date: June 15, 1948
Creator: Dietz, Robert O., Jr.; Wishnek, George & Kuenzig, John K.
System: The UNT Digital Library
Air-Consumption Parameters for Automatic Mixture Control of Aircraft Engines (open access)

Air-Consumption Parameters for Automatic Mixture Control of Aircraft Engines

From Introduction: "The purpose of this analysis was to investigate the use of a function of intake-manifold pressure, exhaust back pressure, intake manifold temperature, and engine speed in place of a venturi as a means of measuring engine air consumption and to determine if this function is suitable for automatic mixture control."
Date: September 1, 1944
Creator: Shames, Sidney J.
System: The UNT Digital Library