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14,270 Matching Results
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Efficiency Rating Systems Preliminary Report
This report is about the Efficiency Rating Systems Preliminary Report
Date:
May 1947
Creator:
Graves, W. Brooke
Object Type:
Report
System:
The UNT Digital Library
A method for studying the hunting oscillations of and airplane with a simple type of automatic control
Report presenting a method for predicting the amplitude and frequency, under certain simplifying conditions, of the hunting oscillations of an automatically controlled aircraft with lag in the control system or in response of the aircraft to the controls. Formulas are given expressing the response to a variation of signal in terms of response to a unit signal.
Date:
May 1944
Creator:
Jones, Robert T.
Object Type:
Report
System:
The UNT Digital Library
The effect of compressibility on two-dimensional tunnel-wall interference for a symmetrical airfoil
Summary: The effective change in the velocity of flow past a wing section, caused by the presence of wind-tunnel walls, is known for potential flow. This theory is extended by investigation of the two-dimensional compressible flow past a thin Rankine Oval. It is shown that for a symmetrical section at zero angle of attack the velocity increment due to the tunnel walls in the incompressible case must be multiplied by the factor 1/1-M^2 to take account of compressibility effects. The Mach number, M, corresponds to conditions in the wind-tunnel test section with the model removed (p. 1.).
Date:
May 1943
Creator:
Nitzberg, Gerald E.
Object Type:
Report
System:
The UNT Digital Library
Emergency Measures for Increasing the Range of Fighter Airplanes
"An analysis was made to show the relative effectiveness of streamline external fuel tanks, a fuel tank in the form of a wing mounted in a biplane position, and auxiliary wing panels attached at the wing tips to increase the span as temporary means for increasing the range of a fighter-type airplane. Figures and charts for the various devices considered show the results of calculations of range, duration of flight, and take-off distance for both land-base and carrier operation. The results indicated that the wing-tip extensions were the most promising of the devices considered" (p. 1).
Date:
May 1943
Creator:
Jones, Robert T. & Wetmore, Joseph W.
Object Type:
Report
System:
The UNT Digital Library
Fuel-Evaporation Loss as Determined by the Change in the Specific Gravity of the Fuel in an Aircraft Fuel Tank
Report discusses the results of an investigation to determine the feasibility of using the change in the specific gravity of fuels in aircraft fuel tanks to measure fuel-vaporization loss. Six fuels were tested via fuel-distillation tests and simulated-flight tests. An equation based on the specific gravity of the fuel is also described.
Date:
May 1945
Creator:
Stone, Charles S. & Kramer, Walter E.
Object Type:
Report
System:
The UNT Digital Library
Profile-Drag Coefficients of Conventional and Low-Drag Airfoils as Obtained in Flight
"The results of flight investigations of the profile drag of several carefully finished conventional and low-drag airfoils are presented. The results indicated that in all cases lower profile-drag coefficients were obtained with the low-drag than with the conventional airfoils over the range of lift coefficient tested and that, for comparable conditions of lift coefficient and Reynolds number, the low-drag airfoils may have profile-drag coefficients which are at least 27 percent lower than the profile-drag coefficients of the conventional airfoils" (p.1).
Date:
May 1944
Creator:
Zalovcik, John A.
Object Type:
Report
System:
The UNT Digital Library
An Experimental Investigation of Rectangular Exhaust-Gas Ejectors Applicable for Engine Cooling
Report presenting an experimental investigation of rectangular exhaust-gas ejector pump to provide data that would serve as a guide to the design of ejector applications for aircraft engines with marginal cooling. With a decrease in the quantity of air pumped and an increase in the length of an ejector, the ejector pressure rise increases to optimum values. Results regarding straight ejectors, diffuser ejectors, curved ejectors, ejector aspect ratio, divided ejectors, multistage ejectors, and nozzle-exit effects are provided.
Date:
May 1945
Creator:
Manganiello, Eugene J. & Bogatsky, Donald
Object Type:
Report
System:
The UNT Digital Library
An Investigation of a Thermal Ice-Prevention System for a C-46 Cargo Airplane 5: Effect of Thermal System on Airplane Cruise Performance
Report presenting flight tests conducted to evaluate the effect of a thermal ice prevention system on the aerodynamic performance of a C-46 cargo airplane. The installation of the thermal ice-prevention system was found to reduce the indicated airspeed by about 6 miles per hour. Results regarding the overall performance change resulting from the installation of the thermal system, reduction of power attributed to heat-exchanger exhaust-gas back pressure, reduction of power attributed to the internal and external drag of the thermal system, and the additional airplane gross weight attributed to the thermal system are provided.
Date:
May 1945
Creator:
Selna, James
Object Type:
Report
System:
The UNT Digital Library
An Investigation of a Thermal Ice-Prevention System for a C-46 Cargo Airplane 6: Dry-Air Performance of Thermal System at Several Twin- and Single-Engine Operating Conditions at Various Altitudes
Report presenting flight tests to establish the dry-air-performance characteristics of a thermal ice-prevention system at various operating conditions and altitudes. Results regarding twin-engine tests and single-engine tests of characteristics such as skin temperatures and location of heating are provided.
Date:
May 1945
Creator:
Selna, James & Kees, Harold L.
Object Type:
Report
System:
The UNT Digital Library
University of Chicago Spectroscopic Laboratory Annual Report: September 1, 1948 - May 31, 1949, Part 1
Report containing articles, manuscripts, and tabulations of recorded spectra created by the Spectroscopic Laboratory of the University of Chicago.
Date:
1949-05~
Creator:
University of Chicago. Laboratory of Molecular Structure and Spectra.
Object Type:
Report
System:
The UNT Digital Library
[2012.201.B0311.0396]
Photograph is of a pitcher crouched down with his baseball mitt in one hand and a catcher's mask in the other.
Date:
May 15, 1942
Creator:
Turner, John
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[2012.201.B0413.0233]
Photograph is of a man in a baseball uniform, smiling and shaking the hand of another person.
Date:
May 1, 1946
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[2012.201.B0311.0395]
Photograph is of a man wearing a baseball uniform squatting in a pitcher's stance holding his glove open as if to catch a ball.
Date:
May 11, 1942
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
BASEMENT BOX 67.0039
Photograph taken of the charred interior of a building damaged by fire. Caption: "Explosion in which Homer Long was fatally burned."
Date:
May 26, 1948
Creator:
Kaho, C. J.
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Winter legumes for green manure in the Cotton Belt.
Describes varieties of the winter legumes used for "green manure" in the southern United States; provides suggestions for considerations to make when using winter legumes on farmland.
Date:
May 1942
Creator:
McKee, Roland. & McNair, A. D.
Object Type:
Book
System:
The UNT Digital Library
[Commencement Program for Denton County Seventh Grade Graduation, May, 25 1940]
Commencement program for the seventh grade graduation of Denton county. The program includes the order of service and list of graduates.
Date:
May 1940
Creator:
North Texas State Teachers College
Object Type:
Pamphlet
System:
The UNT Digital Library
[Graduation Exercises for the Teachers College High School, May, 28, 1942]
Graduation Exercises for the 1942 Teachers College High School. Printed on the cover are the words, "Graduation Exercises of the Teachers College High School Main Auditorium May Twenty-Eight Nineteen Hundred Forty-Two Eight P.M." The program includes the order of service and a list of graduates.
Date:
May 1942
Creator:
Teachers College High School
Object Type:
Pamphlet
System:
The UNT Digital Library
[Commencement Program for North Texas State Teachers College, May 31, 1942]
Commencement program and order of events for the 1942 North Texas State Teachers College baccalaureate service.
Date:
May 1942
Creator:
North Texas State Teachers College
Object Type:
Pamphlet
System:
The UNT Digital Library
[Commencement Program for North Texas State Teachers College, May 31, 1943]
Commencement program for the North Texas State Teachers College class of 1943, including the order of service and list of graduates for both baccalaureate and master degrees.
Date:
May 1943
Creator:
North Texas State Teachers College
Object Type:
Pamphlet
System:
The UNT Digital Library
[Commencement Program for North Texas State Teachers College, May 30, 1943]
The 1943 Baccalaureate Service program for the North Texas State Teachers College. Printed on the cover are the words, "The Baccalaureate Service of North Texas State Teachers College Denton, Texas Sunday, Texas Sunday, May Thirtieth Nineteen Hundred and Forty Three At Eleven o'clock in the Morning The Main Auditorium." The program contains the order of service for the ceremony.
Date:
May 1943
Creator:
North Texas State Teachers College
Object Type:
Pamphlet
System:
The UNT Digital Library
[Commencement Program for North Texas State Teachers College, May 28, 1944]
The 1944, baccalaureate service program for the North Texas State Teachers College. Printed on the cover are the words, "The Baccalaureate Service of North Texas State Teachers College. Denton, Texas. Sunday, May Twenty-Eight. Nineteen Hundred and Forty-Four. At Eleven O'clock in the Morning. The Main Auditorium." The program contains the order of service for the ceremony.
Date:
May 1944
Creator:
North Texas State Teachers College
Object Type:
Pamphlet
System:
The UNT Digital Library
[Commencement Program for North Texas State Teachers College, May 28, 1944]
The commencement program for the 1944 graduating class of North Texas State Teachers College. Printed on the cover are the words, "The Fifth-Fourth Annual Commencement of North Texas State Teachers College. Denton, Texas. Sunday, May Twenty-Eight. Nineteen Hundred and Forty-Four. At Eight O'clock in the Evening. The Main Auditorium." The program contains the order of service and a list of graduates for both the baccalaureate and master's degree.
Date:
May 1944
Creator:
North Texas State Teachers College
Object Type:
Pamphlet
System:
The UNT Digital Library
[Commencement Program for North Texas State Teachers College, May 27, 1945]
Commencement program for the 1945 graduation of North Texas State Teachers College. Printed on the cover are the words, "The Baccalaureate Service of North Texas State Teacher College. Denton, Texas. Sunday, May Twenty-Seventh. Nineteen Hundred and Forty-Five. At Eleven o'Clock in the Morning. The Auditorium." The program contains the order of service for the graduation ceremony.
Date:
May 1945
Creator:
North Texas State Teachers College
Object Type:
Pamphlet
System:
The UNT Digital Library
[Commencement Program for North Texas State Teachers College, May 27, 1945]
Commencement program of the 1945 graduating class of North Texas State Teachers College. Printed on the cover are the words, "The Fifty-Fifth Annual Commencement of North Texas State Teachers College. Denton, Texas. Sunday, May Twenty-Seventh. Nineteen Hundred and Forty-Five. At Eight o'Clock in the Evening. The Auditorium." The program contains the order of service and a list of graduates for both the baccalaureate and master's degree.
Date:
May 1945
Creator:
North Texas State Teachers College
Object Type:
Pamphlet
System:
The UNT Digital Library