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The Effect of Airfoil Thickness and Plan Form on Lateral Control

Description: This investigation was carried out for the purpose of determining the effectiveness of ailerons and tests were made on six model airfoils in the no. 1 wind tunnel of the National Advisory Committee for Aeronautics. The method consisted in measuring the rolling moments and aileron moments in the ordinary way.The results show that the thickness of the airfoil has very little effect on either the rolling moment or the hinge moment, although the resulting efficiency is somewhat higher for the taper… more
Date: 1924
Creator: Hoot, H. I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A Study of Longitudinal Dynamic Stability in Flight

Description: "This investigation was carried out by the aerodynamic staff of the National Advisory Committee for Aeronautics for the purpose of studying experimentally the longitudinal dynamic stability of airplanes in flight. The airplanes selected for this purpose were a standard rigged VE-7 advanced-training airplane and a JN4H with special tail surfaces. The airplanes were caused to oscillate by means of the elevator, then the longitudinal control was either locked or kept free while the oscillation die… more
Date: 1924
Creator: Norton, F. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Engine performance and the determination of absolute ceiling

Description: From Summary: "This report contains a brief study of the variation of engine power with temperature and pressure. The variation of propeller efficiency in standard atmosphere is obtained from the general efficiency curve which is developed in NACA report no. 168. The variation of both power available and power required are then determined and curves plotted, so that the absolute ceiling may be read directly from any known sea-level value of the ratio of power available to power required."
Date: January 1924
Creator: Diehl, Walter S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Dynamic Stability as Affected by the Longitudinal Moment of Inertia

Description: "In a recent Technical Note (NACA-TN-115, October, 1922), Norton and Carrol have reported experiments showing that a relatively large (15 per cent) increase in longitudinal moment of inertia made no noticeable difference in the stability of a standard SE-5A airplane. They point out that G. P. Thomson, "Applied Aeronautics," page 208, stated that an increase in longitudinal moment of inertia would decrease the stability. Neither he nor they make any theoretical forecast of the amount of decrease… more
Date: 1924
Creator: Wilson, Edwin B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Reliable formulae for estimating airplane performance and the effects of changes in weight, wing area, or power

Description: This report contains the derivation and the verification of formulae for predicting the speed range ratio, the initial rate of climb, and the absolute ceiling of an airplane. Curves used in the computation are given in NACA-TR-171. Standard formulae for service ceiling, time of climb, cruising range, and endurance are also given in the conventional forms.
Date: January 1924
Creator: Diehl, Walter S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Small Angular Oscillations of Airplanes in Steady Flight

Description: "This investigation was carried out by the National Advisory Committee for Aeronautics at the request of the Army Air Service to provide data concerning the small angular oscillations of several types of airplanes in steady flight under various atmospheric conditions. The data are of use in the design of bomb sights and other aircraft instruments. The method used consisted in flying the airplane steadily in one direction for at least one minute, while recording the angle of the airplane with th… more
Date: 1924
Creator: Norton, F. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Effect of Slipstream Obstructions on Air Propellers

Description: "The screw propeller on airplanes is usually placed near other objects, and hence its performance may be modified by them. Results of tests on propellers free from slip stream obstructions, both fore and aft, are therefore subject to correction, for the effect of such obstructions and the purpose of the investigation was to determine the effect upon the thrust and torque coefficients and efficiency, for previously tested air propellers, of obstructions placed in the slip stream, it being realiz… more
Date: 1924
Creator: Lesley, E. P. & Woods, B. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Relative efficiency of direct and geared drive propellers

Description: This report is an extension of NACA-TR-168 and has been prepared for the National Advisory Committee for Aeronautics to show the relative values of various direct and geared drives. It is well known that in general a geared-down propeller has higher efficiency than a direct-drive propeller, but the literature on this subject does not present the data in such form that the aeronautical engineer can readily visualize the effect of gearing. This report has been prepared to show the actual net gain… more
Date: January 1924
Creator: Diehl, Walter S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

[Current Literature Club]

Description: Pamphlet of the Current Literature Club of the North Texas State Teachers College, outlining a course of study for the 1924-25 school year, studying short stories. It includes information about the group, such as membership, motto, and constitution, as well as the course outline.
Date: 1924
Creator: North Texas State Teachers College. Current Literature Club.
Item Type: Refine your search to only Pamphlet
Partner: UNT Libraries Special Collections
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Der Tonwille, Volume 4, Number 4, October 1924

Description: Quarterly journal discussing musical theory. This issue contains articles on the opening chorus of J.S. Bach's St. Matthew Passion; Joseph Haydn's Austrian Folk Anthem; Franz Schubert's Four Impromptus, op. 90, no. 3 and Impromptu in F minor, op, 94, no. 3 from "Moments musicals"; Felix Mendelssohn's Venetian Gondola Song, op. 30, no. 6 and "Song Without Words," op. 67, no. 6; two movements from Robert Schumann's "Scenes from Childhood": "From Distant Lands and People" and "Reverie." An explan… more
Date: October 1924
Item Type: Refine your search to only Journal/Magazine/Newsletter
Partner: UNT Music Library

Straw cloche

Description: Cloche of rose straw. The high, rounded crown is of finely braided rose/pink colored straw. At one side is an appliqué in green, beige, peach, and brown of a stylized floral design in silk taffeta with colored straw detailing and outlines. Around the base of the crown is a segment of rose satin quilted with lines of copper and tan straw, turned up at front to form a brim and turned downwards at back. Lined in an iridescent red satin. No labels. Measurements: 17 cm. front to back; 24 cm. side t… more
Date: 1924
Item Type: Refine your search to only Physical Object
Partner: UNT College of Visual Arts + Design

Cloche

Description: Cloche hat of straw. The high, domed straw is crown of sienna-red braid, with a band of solid reddish-pink silk around the base. Below the silk band is multi-colored ruched trim extending less than 1/4" from the band. Below the trim is a brim covered by sienna grosgrain ribbon, extending very slightly in front and disappearing in back. The hat is lined in a metallic bronze fabric. No designer's or retailer's labels, but hat does retain original price tag inside crown.
Date: 1924
Item Type: Refine your search to only Physical Object
Partner: UNT College of Visual Arts + Design

Beaded dress

Description: Dress of yellow chiffon; all-over beading in orange, yellow, and brown; lace circles just below chest and along hem; bow and flowers at left waist; back has openings with beads at top; peach under-dress.
Date: 1924/1929
Item Type: Refine your search to only Physical Object
Partner: UNT College of Visual Arts + Design

[Photo album]

Description: Photograph of an early family album featuring Frank Cuellar Jr. (top right) and Frank Sr. (bottom left), and (top left) on a page album.
Date: [1924..1948]
Item Type: Refine your search to only Photograph
Partner: UNT Libraries Special Collections
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