Technical Report Archive & Image Library (TRAIL) - 11 Matching Results

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Choice of Profile for the Wings of an Airplane Part 1

Description: "The choice of the profile for the wings of an airplane is a problem which should be solved by a scientific method based on data obtained by systematic experimentation. The problem, in its present form, may be stated as follows: "To find a profile which has certain required aerodynamic characteristics and which encloses the spars, whose number, dimensions and separating distance are likewise determined by structural considerations." At present, the static test, corresponding to the case of acce… more
Date: June 1928
Creator: Toussaint, A. & Carafoli, E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Choice of Profile for the Wings of an Airplane Part 2

Description: This report gives a general method for drawing airplane profiles. This method is useful, but it leads to a somewhat laborious drawing which becomes quite complicated when we take a transformation function having terms of a high degree.
Date: June 1928
Creator: Toussaint, A. & Carafoli, E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Diesel as a Vehicle Engine

Description: The thorough investigation of a Dorner four-cylinder, four-stroke-cycle Diesel engine with mechanical injection led me to investigate more thoroughly the operation of the Diesel as a vehicle engine. Aside from the obvious need of reliability of functioning, a high rotative speed, light weight and economy in heat consumption per horsepower are also indispensable requirements.
Date: June 1928
Creator: Neumann, Kurt
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Fokker "Trimotor F VII" Commercial Transport Monoplane

Description: Directly developed from the single engined type F VII ten passenger monoplanes, the Fokker Trimotor closely follows the commercial aircraft that preceded it. It has three Wright Whirlwind air-cooled engines, rated at 200 HP each. Details of the wings, cockpit and cabin, baggage and freight compartments, controls, landing gear, characteristics, drawings, and photographs are provided.
Date: June 1928
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Full Scale Tests of Wood Propellers on a VE-7 Airplane in the Propeller Research Tunnel

Description: "The investigation described in this report was made primarily to afford a comparison between propeller tests in the new propeller research tunnel and flight tests and small model tests on propellers. Three wood propellers which had been previously tested in flight on a VE-7 airplane, and of which models had also been tested in a wind tunnel, were tested again on a VE-7 airplane in the propeller research tunnel. The results of these tests are in fair agreement with those of the flight and model… more
Date: June 18, 1928
Creator: Weick, Fred E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Full Scale Tests on a Thin Metal Propeller at Various Tip Speeds

Description: "This report describes an investigation made in order to determine the effect of tip speed on the characteristics of a thin-bladed metal propeller. The propeller was mounted on a VE-7 airplane with a 180-HP E-2 engine, and tested in the 20-foot propeller research tunnel of the National Advisory Committee for Aeronautics. It was found that the effect of tip speed on the propulsive efficiency was negligible within the range of the tests, which was from 600 to 1,000 feet per second (about 0.5 to 0… more
Date: June 20, 1928
Creator: Weick, Fred E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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An Investigation of the Use of Discharge Valves and an Intake Control for Improving the Performance of N.A.C.A. Roots Type Supercharger

Description: "This report presents the results of an analytical investigation on the practicability of using mechanically operated discharge valves in conjunction with a manually operated intake control for improving the performance of N. A. C. A. Roots type superchargers. These valves, which may be either of the oscillating or rotating type, are placed in the discharge opening of the supercharger and are so shaped and synchronized with the supercharger impellers that they do not open until the air has been… more
Date: June 29, 1928
Creator: Schey, Oscar W. & Wilson, Ernest E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Preliminary biplane tests in the variable density wind tunnel

Description: "Biplane cellules using the N.A.C.A.-M6 airfoil section have been tested in the variable density wind tunnel of the National Advisory Committee for Aeronautics. Three cellules, differing only in the amount of stagger, were tested at two air densities, corresponding to pressures of one atmosphere and of twenty atmospheres. The range of angle of attack was from -2 degrees to +48 degrees. The effect of stagger on the lift and drag, and on the shielding effect of the upper wing by the lower at high… more
Date: June 1928
Creator: Shoemaker, James M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Speed and deceleration trials of U.S.S. Los Angeles

Description: From Summary: "The trials reported in this report were instigated by the Bureau of Aeronautics of the Navy Department for the purpose of determining accurately the speed and resistance of the U. S. S. "Los Angeles" with and without water recovery apparatus, and to clear up the apparent discrepancies between the speed attained in service and in the original trials in Germany. The trials proved very conclusively that the water recovery apparatus increases the resistance about 20 per cent, which i… more
Date: June 12, 1928
Creator: De France, S. J. & Burgess, C. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Welding of High Chromium Steels

Description: A brief description is given of different groups of high chromium steels (rustless iron and stainless steels) according to their composition and more generally accepted names. The welding procedure for a given group will be much the same regardless of the slight variations in chemical composition which may exist within a certain group. Information is given for the tensile properties (yield point and ultimate strength) of metal sheets and welds before and after annealing on coupons one and one-h… more
Date: June 1928
Creator: Miller, W. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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