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  Partner: UNT Libraries Government Documents Department
 Decade: 1930-1939
 Year: 1936
 Collection: Technical Report Archive and Image Library
The 5- by 7-meter wind tunnel of the DVL

The 5- by 7-meter wind tunnel of the DVL

Date: March 1, 1936
Creator: Kramer, M
Description: The report contains a description of the DVL wind tunnel. According to the cones fixed, an elliptical stream with axes 5 by 7 meters and length 9 meters, or a stream 6 by 8 meters in cross section and 11 meters in length is available. The top speed with the smaller cone is 65 meters per second. The testing equipment consists of an automatic six-component balance and a test rig for propellers and engines up to 650 horsepower.
Contributing Partner: UNT Libraries Government Documents Department
Aerodynamic characteristics of a wing with Fowler flaps including flap loads, downwash, and calculated effect on take-off

Aerodynamic characteristics of a wing with Fowler flaps including flap loads, downwash, and calculated effect on take-off

Date: January 1, 1936
Creator: Platt, Robert C
Description: This report presents the results of wind tunnel tests of a wing in combination with each of three sizes of Fowler flap. The purpose of the investigation was to determine the aerodynamic characteristics as affected by flap chord and position, the air loads on the flaps, and the effect of flaps on the downwash.
Contributing Partner: UNT Libraries Government Documents Department
Aerodynamic characteristics of wings with cambered external airfoil flaps, including lateral control, with a full-span flap

Aerodynamic characteristics of wings with cambered external airfoil flaps, including lateral control, with a full-span flap

Date: January 1, 1936
Creator: Platt, Robert C
Description: The results of a wind-tunnel investigation of the NACA 23012, the NACA 23021, and the Clark Y airfoils, each equipped with a cambered external-airfoil flap, are presented in this report. The purpose of the research was to determine the relative merit of the various airfoils in combination with the cambered flap and to investigate the use of the flap as a combined lateral-control and high-lift device.
Contributing Partner: UNT Libraries Government Documents Department
Air flow in a separating laminar boundary layer

Air flow in a separating laminar boundary layer

Date: January 1, 1936
Creator: Schubauer, G B
Description: The speed distribution in a laminar boundary layer on the surface of an elliptic cylinder, of major and minor axes 11.78 and 3.98 inches, respectively, has been determined by means of a hot-wire anemometer. The direction of the impinging air stream was parallel to the major axis. Special attention was given to the region of separation and to the exact location of the point of separation. An approximate method, developed by K. Pohlhausen for computing the speed distribution, the thickness of the layer, and the point of separation, is described in detail; and speed-distribution curves calculated by this method are presented for comparison with experiment.
Contributing Partner: UNT Libraries Government Documents Department
Altitude-pressure tables based on the United States standard atmosphere

Altitude-pressure tables based on the United States standard atmosphere

Date: January 1, 1936
Creator: Brombacher, W G
Description: This report is a revision of the altitude pressure tables of the United States standard atmosphere given in Technical Report No. 246. The altitude range has been extended from 50,000 to 80,000 feet.
Contributing Partner: UNT Libraries Government Documents Department
Analysis and model tests of autogiro jump take-off

Analysis and model tests of autogiro jump take-off

Date: October 1, 1936
Creator: Wheatley, John B
Description: An analysis is made of the autogiro jump take-off, in which the kinetic energy of the rotor turning at excess speed is used to effect a vertical take-off. By the use of suitable approximations, the differential equation of motion of the rotor during this maneuver is reduced to a form that can be solved. Only the vertical jump was studied; the effect of a forward motion during the jump is discussed briefly. The results of model tests of the jump take-off have been incorporated in the paper and used to establish the relative accuracy of the results predicted from the analysis. Good agreement between calculation and experiment was obtained by making justifiable allowances.
Contributing Partner: UNT Libraries Government Documents Department
Analysis of 2-spar cantilever wings with special reference to torsion and load transference

Analysis of 2-spar cantilever wings with special reference to torsion and load transference

Date: January 1, 1936
Creator: Kuhn, Paul
Description: This report deals with the analysis of 2-spar cantilever wings in torsion, taking cognizance of the fact that the spars are not independent, but are interconnected by ribs and other structural members. The principles of interaction are briefly explained, showing that the mutual relief action occurring depends on the "pure torsional stiffness" of the wing cross section. Various practical methods of analysis are outlined. The "Friedrichs-Von Karman equations" are shown to require the least amount of labor. Numerical examples by the several methods of analysis are given and the agreement between the calculation and experiment is shown.
Contributing Partner: UNT Libraries Government Documents Department
An analysis of longitudinal stability in power-off flight with charts for use in design

An analysis of longitudinal stability in power-off flight with charts for use in design

Date: January 1, 1936
Creator: Zimmerman, Charles H
Description: This report presents a discussion of longitudinal stability in gliding flight together with a series of charts with which the stability characteristics of any airplane may be readily estimated.
Contributing Partner: UNT Libraries Government Documents Department
Analysis of the three lowest bending frequencies of a rotating propeller

Analysis of the three lowest bending frequencies of a rotating propeller

Date: January 1, 1936
Creator: Liebers, F
Description: The available literature on rotating propeller oscillations reveals a lack of uniformity in interpretation, particularly as concerns the data on the overtone frequency with respect to the centrifugal forces. The present report is a survey of the existing data for computing the bending frequency and a check on the dependability of the calculating methods.
Contributing Partner: UNT Libraries Government Documents Department
Annual report of the National Advisory Committee for Aeronautics (21st).administrative report including Technical Report nos. 508 to 541

Annual report of the National Advisory Committee for Aeronautics (21st).administrative report including Technical Report nos. 508 to 541

Date: January 1, 1936
Creator: unknown
Description: Report includes the National Advisory Committee for Aeronautics letter of submittal to the President, Congressional report, summaries of the committee's activities and research accomplished, bibliographies, and financial report.
Contributing Partner: UNT Libraries Government Documents Department
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