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The prevention of fire in the air

Description: On an airplane, the safeguards adopted may be divided into three classes, those intended to prevent a fire from getting started, those intended to put it out if it does get under way, and, finally, those designed to limit the damage which a fire can do.
Date: September 1, 1922
Creator: Warner, Edward P.
Partner: UNT Libraries Government Documents Department

Wind tunnel tests of five strut sections in yaw

Description: In the first series of wind tunnel tests, the drag and cross wing force of all the struts were measured at a wind speed of 30 mph and at angles of yaw from 0 degrees to 20 degrees. To determine the magnitude of the VL effect, each strut was tested at zero yaw and at a series of speeds ranging from 15 to 38 mph. Although designed as fairings for cables, part of these sections gave such high crosswind forces that they seemed to have possibilities as airfoils. Therefore, the lift (identical with the crosswind force) and drag coefficients were recalculated for four sections on the basis of broadside area to make them comparable with wing coefficients. The general conclusion that the best fineness ratio for a strut is a function of the Reynolds number, decreasing steadily as that quality increases, has of course been reached many times, both by theory and experiment. It was confirmed here once more, and the effect of form on sensitiveness to VL is also strikingly shown. It seems probable that this effect of form is largely due to interaction between the nose and tail, and to the influence which the form of the nose exerts over the whole flow around the strut.
Date: November 1, 1923
Creator: Warner, Edward P.
Partner: UNT Libraries Government Documents Department

Slip-stream corrections performance computation

Description: This report is an analysis of experiments performed by Eiffel on the air velocity in slip stream of a propeller, and also includes a theoretical discussion of the magnitude of the velocity in different propellers.
Date: January 1, 1920
Creator: Warner, Edward P.
Partner: UNT Libraries Government Documents Department

Wing spar stress charts and wing truss proportions

Description: In order to simplify the calculation of beams continuous over three supports, a series of charts have been calculated giving the bending moments at all the critical points and the reactions at all supports for such members. Using these charts as a basis, calculations of equivalent bending moments, representing the total stresses acting in two bay-wing trusses of proportions varying over a wide range, have been determined, both with and without allowance for column effect. This leads finally to the determination of the best proportions for any particular truss or the best strut locations in any particular airplane. The ideal proportions are found to vary with the thickness of the wing section used, the aspect ratio, and the ratio of gap to chord.
Date: January 1, 1926
Creator: Warner, Edward P.
Partner: UNT Libraries Government Documents Department

Statical longitudinal stability of airplanes

Description: This report, which is a continuation of the "Preliminary report on free flight testing" (report no. NACA-TR-70), presents a detailed theoretical analysis of statical stability with free and locked controls and also the results of many free flight test on several types of airplanes. In developing the theory of stability with locked controls an expression for pitching moment is derived in simple terms by considering the total moment as the sum of the moments due to wings and tail surface. This expression, when differentiated with respect to angle of incidence, enables an analysis to be made of the factors contributing to the pitching moment. The effects of slipstream and down wash are also considered and it is concluded that the C. G. Location has but slight effect or stability, and that stability is much improved by increasing the efficiency of the tail surfaces, which may be done by using an "inverted" tail plane. The results of free flight tests with locked controls are discussed at length and it is shown that the agreement between the experimental results and theory is very satisfactory. The theory of stability with free controls is not amendable to the simple mathematical treatment used in the case of locked controls, but a clear statement of the conditions enables several conclusions to be drawn, one of which is that the fixed tail surfaces should be much larger than the movable surfaces.
Date: January 1, 1921
Creator: Warner, Edward P.
Partner: UNT Libraries Government Documents Department

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 1, 1922
Creator: Warner, Edward P.
Partner: UNT Libraries Government Documents Department

Comfort in flight

Description: Some advances in passenger comfort are discussed, namely, ventilated cabins, heating, seating arrangements, and doors.
Date: June 1, 1922
Creator: Warner, Edward P.
Partner: UNT Libraries Government Documents Department

Commercial aircraft in war

Description: The difference between aircraft for commercial and wartime uses is delineated, but the interchangability between the two is also discussed. Airships in both roles is also presented.
Date: August 1, 1922
Creator: Warner, Edward P.
Partner: UNT Libraries Government Documents Department

Stability of airplanes

Description: The author attempts to correct the misconception that piloting an airplane requires extraordinary skill and balance. He also tries to show that airplanes are extremely stable in flight. Some of the major points covered in this article include: automatic pilots, airplanes designed to be stable, and the reliance on mathematics to help in designing stable aircraft.
Date: May 1, 1922
Creator: Warner, Edward P.
Partner: UNT Libraries Government Documents Department

European air travel in 1922

Description: This article discusses the different passenger air transport services offered in Europe. The author deals mainly with the service offered between different cities, in terms of time and cost.
Date: July 1, 1922
Creator: Warner, Edward P.
Partner: UNT Libraries Government Documents Department

Police regulation of aircraft

Description: Different aspects of aircraft regulation are discussed such as: protecting the public; the restriction of flights over crowds; regulations of wing-walkers.
Date: August 1, 1922
Creator: Warner, Edward P.
Partner: UNT Libraries Government Documents Department

Giant airplanes

Description: It is hardly possible for the most imaginative aeronautical enthusiast to look forward to a time when the airplane will have reached the dimensions commensurate with those already attained by the airship.
Date: September 1, 1922
Creator: Warner, Edward P.
Partner: UNT Libraries Government Documents Department

Miniature airplanes

Description: The present report will treat only the smallest airplanes equipped with engines. The two types discussed are those airplanes with the smallest dimensions, and those that have the smallest power requirements.
Date: September 1, 1922
Creator: Warner, Edward P.
Partner: UNT Libraries Government Documents Department

Mechanical aids to flight

Description: This report examines the great utility and safety of using instruments when flying. Instruments can be especially useful in conditions when the pilot has trouble spatially orienting himself.
Date: May 1, 1922
Creator: Warner, Edward P.
Partner: UNT Libraries Government Documents Department

The disposal of military aircraft

Description: The end of the war saw every belligerent with vast stocks of aircraft and aircraft supplies in all stages of usefulness, much of the material being absolutely new. The question of the best method of getting rid of this accumulation is one which has been agitating those responsible for its disposal for more than three years now, but no wholly satisfactory solution has yet been reached.
Date: September 1, 1922
Creator: Warner, Edward P.
Partner: UNT Libraries Government Documents Department

Depreciation of aircraft

Description: There is a widespread, and quite erroneous, impression to the effect that aircraft are essentially fragile and deteriorate with great rapidity when in service, so that the depreciation charges to be allowed on commercial or private operation are necessarily high.
Date: December 1, 1922
Creator: Warner, Edward P.
Partner: UNT Libraries Government Documents Department

Factors of safety

Description: Factors of safety serve three purposes: provides against trouble arising from unexpectedly large loads, allows for imperfections of workmanship, represents a depreciation allowance.
Date: December 1, 1923
Creator: Warner, Edward P.
Partner: UNT Libraries Government Documents Department

Specializing for record-breaking

Description: This report seeks to determine what constitutes airplane performance and what line should be followed in seeking to break records if the designer is given a free hand.
Date: February 1, 1924
Creator: Warner, Edward P.
Partner: UNT Libraries Government Documents Department