UNT Libraries Government Documents Department - 13 Matching Results

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Crank Case Scavenging of a Two-Stroke-Cycle Engine

Description: "Experiments with a two-stroke-cycle, crank case scavenging engine. Effect of systematic variation of the height of the scavenge and exhaust ports on the scavenging, as determined by gas analysis. The best results were obtained under conditions differing from the usual ones" (p. 1).
Date: January 1928
Creator: Holm, Otto
Item Type: Refine your search to only Report
open access

Determination of Propeller Deflection by Means of Static Load Tests on Models

Description: "This note describes a simple and inexpensive method for determining the deflection of propeller blades under operating loads. Both the centrifugal force and air force loads are applied statically as a number of concentrated loads by means of weights and wires. Two methods of attaching the wires to the propeller blades have been tested, both giving approximately the same deflections. The method is considered useful for studying the deflections of propellers of different shapes under various ope… more
Date: January 1928
Creator: Weick, Fred E.
Item Type: Refine your search to only Report
open access

The Effect of the Sperry Messenger Fuselage on the Air Flow at the Propeller Plane

Description: "In order to study the effect of the fuselage, landing gear, and engine on the air flow through the propeller, a survey was made in the plane of the Sperry Messenger propeller with the propeller removed. The tests were made in the 20-foot air stream of the propeller research tunnel of the National Advisory Committee for Aeronautics at Langley Field, Virginia. The variation of the velocity with distance from the center in the propeller plane was found to be appreciable and well worth considerati… more
Date: January 1928
Creator: Weick, Fred E.
Item Type: Refine your search to only Report
open access

The Effect on Performance of a Cutaway Center Section

Description: "The assumption is made that a skeleton or cutaway center section is desirable for forward vision and to determine the effect of such mutilation upon performance the following work was done. The airplane used was a Vought VE-7 and in addition to the cutaway center section a system of end plates or fins was installed. Various conditions and combinations were investigated in level flight and in climb" (p. 1).
Date: January 1928
Creator: Carroll, Thomas
Item Type: Refine your search to only Report
open access

Full Scale Drag Tests on Various Parts of Sperry Messenger Airplane

Description: "The drag of a Sperry Messenger airplane with the wings removed, and also the drag of its various component parts, was measured in the 20-foot air stream of the N.A.C.A. propeller research tunnel at air speeds from 50 to 100 m.p.h. It was found that the three-cylinder radial air-cooled engine nearly doubled the drag of the bare fuselage, and the drag of the landing gear was about the same as that of the fuselage and engine combined" (p. 1).
Date: January 1928
Creator: Weick, Fred E.
Item Type: Refine your search to only Report
open access

Helium Tables

Description: These tables are intended to provide a standard method and to facilitate the calculation of the quantity of "Standard Helium" in high pressure containers. The research data and the formulas used in the preparation of the tables were furnished by the Research Laboratory of Physical Chemistry, of the Massachusetts Institute of Technology.
Date: January 1928
Creator: Havill, Clinton H.
Item Type: Refine your search to only Report
open access

Mechanical properties of some materials used in airplane construction

Description: Since lightness is desirable in airplane construction, greater stresses must be tolerated than in other kinds of construction. It is therefore necessary to have a more accurate knowledge of the greatest stresses that may occur and of the actual properties of the materials used. The Aeronautic Research Laboratories took the limit of elasticity as the basis of the strength calculations. Many tests were made of different steels, woods, aluminum alloys, and fabrics.
Date: January 1928
Creator: Wolff, E. B. & Van Ewijk, L. J. G.
Item Type: Refine your search to only Report
open access

Pressure distribution on wing ribs of the VE-7 and TS airplanes in flight Part 2: pull-ups

Description: This paper is the second of a series of notes, each of which presents the complete results of pressure distribution tests made at Langley Field by the National Advisory Committee for Aeronautics, on wing and tail ribs of the VE-7 and TS airplanes for a particular maneuver of flight. The results for pull-ups are presented in the form of curves which show the variation of pressure distribution, total loads, normal acceleration and center of pressure with respect to time.
Date: January 1928
Creator: Rhode, R. V.
Item Type: Refine your search to only Report
open access

Pressure Distribution Over a Wing and Tail Rib of a VE-7 and of a TS Airplane in Flight

Description: "This investigation was made to determine the pressure distribution over a rib of the wing and over a rib of the horizontal tail surface of an airplane in flight and to obtain information as to the time correlation of the loads occurring on these ribs. Two airplanes, VE-7 and TS, were selected in order to obtain the information for a thin and a thick wing section. In each case the pressure distribution was recorded for the full range of angle of attack in level flight and throughout violent man… more
Date: January 1928
Creator: Crowley, J. W., Jr.
Item Type: Refine your search to only Report
open access

Special Propeller Protractor

Description: A special protractor was designed and built with a view towards supplying a simple, inexpensive, practical, portable instrument for making measurements to detect propeller warpage under practically all conditions, without the use of auxiliary equipment, and without having to remove the propeller from the airplane. A detailed description is given of the protractor. Techniques for measuring are described. Directions are given on how to use the protractor to set detachable blade-type propellers on… more
Date: January 1928
Creator: Heim, A. L.
Item Type: Refine your search to only Report
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