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N.A.C.A. control position recorder

Description: Report discussing a new instrument is described which is capable of simultaneously recording the position of the three controls of an airplane. The records are taken photographically on a standard N.A.C.A. film drum and the instrument can be quickly installed in any airplane.
Date: May 1922
Creator: Norton, F. H.
Partner: UNT Libraries Government Documents Department
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Adaptation of aeronautical engines to high altitude flying

Description: Report discussing Issues and techniques relative to the adaptation of aircraft engines to high altitude flight. Covered here are the limits of engine output, modifications and characteristics of high altitude engines, the influence of air density on the proportions of fuel mixtures, methods of varying the proportions of fuel mixtures, the automatic prevention of fuel waste, and the design and application of air pressure regulators to high altitude flying. Summary: 1. Limits of engine output. 2. High altitude engines. 3. Influence of air density on proportions of mixture. 4. Methods of varying proportions of mixture. 5. Automatic prevention of fuel waste. 6. Design and application of air pressure regulators to high altitude flying.
Date: May 1923
Creator: Kutzbach, K.
Partner: UNT Libraries Government Documents Department
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Aerodynamic theory and test of strut forms. Part I

Description: This report presents the first part of a two part study made under this title. In this part the symmetrical inviscid flow about an empirical strut of high service merit is found by both the Rankine and the Joukowsky methods. The results can be made to agree as closely as wished. Theoretical stream surfaces as well as surfaces of constant speed and pressure in the fluid about the strut are found. The surface pressure computed from the two theories agrees well with the measured pressure on the fore part of the model but not so well on the after part. From the theoretical flow speed the surface friction is computed by an empirical formula. The drag integrated from the friction and measured pressure closely equals the whole measured drag. As the pressure drag and the whole drag are accurately determined, the friction formula also appears trustworthy for such fair shapes. (author).
Date: May 1928
Creator: Smith, R. H.
Partner: UNT Libraries Government Documents Department
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Aerodynamic theory and tests of strut forms 2

Description: This report presents the second of two studies under the same title. In this part five theoretical struts are developed from distributed sources and sinks and constructed for pressure and resistance tests in a wind tunnel. The surface pressures for symmetrical inviscid flow are computed for each strut from theory and compared with those found by experiment. The theoretical and experimental pressures are found to agree quantitatively near the bow, only qualitatively over the suction range, the experimental suctions being uniformly a little low, and not at all near the stern.
Date: May 1929
Creator: Smith, R. H.
Partner: UNT Libraries Government Documents Department
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Air-Flow Experiments

Description: This report describes the apparatus used to take air-flow photographs. The photographs show chiefly the spiral course of the lines of flow near the tip of the wing. They constitute therefore a visual presentation of the phenomena covered by airfoil theory.
Date: May 1924
Creator: Wieselsberger, C.
Partner: UNT Libraries Government Documents Department
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Air traffic

Description: This report presents a recounting of the steps taken by France to establish national and international regulation over air traffic.
Date: May 1922
Creator: Sudre, G.
Partner: UNT Libraries Government Documents Department
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Airplane Performance as Influenced by the Use of a Supercharged Engine

Description: "The question of the influence of a supercharged engine on airplane performance is treated here in a first approximation, but one that gives an exact idea of the advantage of supercharging. Considered here is an airplane that climbs first with an ordinary engine, not supercharged, and afterwards climbs with a supercharged engine. The aim is to find the difference of the ceilings reached in the two cases" (p. 1).
Date: May 1920
Creator: de Bothezat, George
Partner: UNT Libraries Government Documents Department
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Airplane Superchargers

Description: Discussed here are the principles and operation of aircraft engine superchargers used to maintain and increase engine power as aircraft encounter decreases in the density of air as altitude rises. Details are given on the design and operation of the centrifugal compressors. A method is given for calculating the amount of power needed to drive a compressor. The effects of the use of a compressor on fuel system operation and design are discussed. Several specific superchargers that were in operation are described.
Date: May 1921
Creator: Noack, W. G.
Partner: UNT Libraries Government Documents Department
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All-Metal Junkers Airplane, Type F 13

Description: Circular describing the all-metal Junkers airplane, specifically the F 13 type. The primary characteristics of the airplanes are the thick cantilever Junkers wing without stay-wires and the all-metal construction. A description of the design, flight characteristics, and some photographs are provided.
Date: May 1926
Partner: UNT Libraries Government Documents Department
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Alloys Similar to Duralumin Made in Other Countries Than Germany

Description: Attempts by other countries to develop patents for alloys similar to duralumin are presented. Duralumin is aluminum alloyed with 3.5-4.5% copper, 0.5% magnesium, and 0.25-1% of manganese. A description of various materials that some have attempted to patent are provided.
Date: May 1925
Creator: Meissner, K. L.
Partner: UNT Libraries Government Documents Department
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Aviation and Insurance

Description: This article considers some of the causes which hinder the development of aircraft insurance. Different risks are discussed as well as the causes of aircraft accidents. Pilot error, poor airdromes, weather conditions, poorly adapted airplanes, and engine failures are all examined and some conclusions are made.
Date: May 1922
Creator: Mayo, R. H.
Partner: UNT Libraries Government Documents Department
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The boll-weevil problem.

Description: Describes the characteristics of the boll weevil, the damage that it causes to crops, and methods for its control.
Date: May 1922
Creator: Hunter, W. D. (Walter David), 1875-1925 & Coad, B. R.
Partner: UNT Libraries Government Documents Department
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Bridge Grafting.

Description: Provides instructions for bridge-grafting to save fruit trees that have been damaged by rodents or disease.
Date: May 1927
Creator: Yerkes, Guy E. (Guy Eston), 1880-
Partner: UNT Libraries Government Documents Department
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The Choice of Air Routes

Description: The author lists rules for the development and planning of air routes. He uses as examples India and Texas, as well as discussing the need for more landing fields.
Date: May 1922
Creator: Warner, Edward P.
Partner: UNT Libraries Government Documents Department
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[Commencement Events for North Texas State Teachers College, May 1925]

Description: A list of commencement events for the 1925, North Texas State Teachers College. It is printed in black ink on card stock paper. It states: "North Texas State Teachers College. Commencement Event, 1925. Tuesday, May 19, 8:15 P.M. - Joint Recital, Women's Glee Club, College Orchestra. Wednesday, May 20, 8:15 P.M. - Recital, Miss Ruby Carlton Walker, Reading Department assisted by Mr. Homer E. Richey, Violin Department. Friday, May 22, 8:15 P.M. - Pageant, College, Miss Coralee Garrison, Director. Saturday, May 23, 8:00 A.M. - Mary Arden Breakfast at the Lodge, 3:30 P.M. -Reception, Current Literature Club at the Home of Miss Morley, 8:15 P.M. Senior and Alumni Banquet. Sunday, May 24, 11:00 A.M. - Baccalaureate Service, 8:15 P.M. - Inauguration of President Marquis. Monday, May 25, 10:00 A.M. - Commencement. Band Concerts on Campus Thursday, Friday and Saturday 6:30 P.M."
Date: May 1925
Creator: North Texas State Teachers College
Partner: UNT Libraries Special Collections
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[Commencement Program for Normal College Training School, May 27, 1922]

Description: Commencement Program for Normal College Training School on May 27, 1922. The program is printed on cardstock and the program reads, "Commencement Program. Normal Training School. Saturday, May 27, 1922. Nine O'Clock. 1. Opening Chorus...Ninth Grade. 2. Address...Mr. Keith. 3. Class Poem...Pauline Rogers. 4. Instrumental Solo...Dora Flyod. 5. Class Prophecy...Lora Blair. 6. Instrumental Solo...Loretta Newton. 7. Essay, "What the Training School Has Meant to Me"...Eugene Wilkins. 8. Class Rhymes and Cartoons...(Owsley Jones. Bill Edwards) 9. Class Prevention...Robert Lomax 10. Delivery of Diplomas...Mr. Odam 11. Closing Chorus...Training School."
Date: May 1922
Creator: Normal College Training School
Partner: UNT Libraries Special Collections
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[Commencement Program for North Texas State Teachers College, May 24, 1925]

Description: Commencement program for the 1925, North Texas Teachers College Baccalaureate Service. The pamphlet is printed in black ink and contains the order of service for the ceremony. The cover reads "The North Texas Teachers College. The Baccalaureate Service. 1925. Sunday Morning May the 24th at seven o'clock. The Auditorium."
Date: May 1925
Creator: North Texas State Teachers College
Partner: UNT Libraries Special Collections
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[Commencement Program for North Texas State Teachers College, May 25, 1925]

Description: Commencement program for the 1925, North Texas State Teachers College Twenty-fourth Annual Commencement. The program is printed on card stock paper in black ink and contains the list of graduates with the order of the service. The cover states "North Texas State Teachers College. Twenty-fourth Annual Commencement. Nineteen hundred and twenty-five. Monday morning. May the twenty-fifth, at ten o'clock. The Auditorium."
Date: May 1925
Creator: North Texas State Teachers College
Partner: UNT Libraries Special Collections
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