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Summary of locations, extents, and intensities of turbulent areas encountered during flight investigations of the jet stream from January 7, 1957 to April 28, 1957

Description: "A summary of the locations, extents, and intensities of turbulent areas encountered during a flight investigation of the jet stream is presented. The data were obtained from NACA VGH time-history records" (p. 1).
Date: March 3, 1958
Creator: Copp, Martin R.
Partner: UNT Libraries Government Documents Department

Investigation to determine effects of rectangular vortex generators on the static pressure drop through a 90 degrees circular elbow

Description: Report presenting an investigation of a constant-area, circular 90 degree elbow of mean radius of curvature equal to its diameter with several arrangements of simple, nontwisted, rectangular vortex generators. The inlet flow had a boundary layer of about one-tenth the duct diameter. Results regarding an elbow with no vortex generators and an elbow with vortex generators are provided.
Date: September 14, 1953
Creator: Valentine, E. Floyd & Copp, Martin R.
Partner: UNT Libraries Government Documents Department

Investigation of High-Subsonic Performance Characteristics of a 12 Degree 21-Inch Conical Diffuser, Including the Effects of Change in Inlet-Boundary-Layer Thickness

Description: "Investigations were conducted of a 12 degree 21-inch conical diffuser of 2:1 area ratio to determine the interrelation of boundary layer growth and performance characteristics. Surveys were made of inlet and exit from, longitudinal static pressures were recorded, and velocity profiles were obtained through an inlet Reynolds number range, determined from mass flows and based on inlet diameter of 1.45 x 10(exp 6) to 7.45 x 10(exp 6) and a Mach number range of 0.11 to approximately choking. These investigations were made to two thicknesses of inlet boundary layer" (p. 1).
Date: March 24, 1950
Creator: Copp, Martin R. & Klevatt, Paul L.
Partner: UNT Libraries Government Documents Department

An analysis of airspeed, altitude, and acceleration data obtained from a twin-engine transport airplane operated over a feeder-line route in the Rocky Mountains

Description: "Time-history data of airspeed, altitude, and acceleration obtained with the NACA VGH recorder from a twin-engine airplane operated by a regional feeder airline in the Rocky Mountains are evaluated to determine the magnitude and frequency of occurrence of gusts and gust accelerations and the operating airspeeds and altitudes. The results obtained are compared with the results previously obtained from a representative short-haul and long-haul operation" (p. 1).
Date: October 1956
Creator: Copp, Martin R. & Fetner, Mary W.
Partner: UNT Libraries Government Documents Department

An analysis of acceleration, airspeed, and gust-velocity data from one type of four-engine transport airplane operated over two domestic routes

Description: From Introduction: "As part of a continuing study of the gust and load histories for transport airplanes (see, for example, refs. 1 and 2), samples of VGH records have been obtained from two four-engine commercial transport airplanes. The data samples represent 839 and 1,080 flight hours of operation on two transcontinental routes and cover operations up to an altitude of 25,000 feet."
Date: October 1955
Creator: Copp, Martin R. & Coleman, Thomas L.
Partner: UNT Libraries Government Documents Department

Maneuver accelerations experienced by five types of commercial transport airplanes during routine operations

Description: "The magnitude and frequency of occurrence of maneuver accelerations experienced by five types of commercial transport airplanes during routine operations have been obtained from time-history (VGH) records and are presented herein. The results are compared with available gust-acceleration data for the operations considered. It is indicated that maneuver accelerations may contribute substantially to the total load histories of transport airplanes, particularly in the case of medium-altitude operations" (p. 1).
Date: April 1954
Creator: Coleman, Thomas L. & Copp, Martin R.
Partner: UNT Libraries Government Documents Department

Analysis of operational airline data to show the effects of airborne weather radar on the gust loads and operating practices of twin-engine short-haul transport airplanes

Description: From Introduction: "The data for operations both with and without radar installed have been analyzed and the results are presented in this paper. Although these results are of limited extent, they provide a basis for early examination of any trends in the gust loads and associated operating practices which might be attributed to the use of radar."
Date: November 1957
Creator: Copp, Martin R. & Walker, Walter G.
Partner: UNT Libraries Government Documents Department

An analysis of accelerations, airspeeds, and gust velocities from three commercial operations of one type of medium-altitude transport airplane

Description: From Introduction: "Past analyses of data from the NACA V-G and the NACA VGH recorders (see, for example, refs. 1 and 2) have yielded information on the magnitude and frequency of occurrence of gust and maneuver accelerations, and the associated airspeeds and altitudes for several types of airplanes flown by different operators on various routes."
Date: March 1955
Creator: Coleman, Thomas L.; Copp, Martin R.; Walker, Walter G. & Engel, Jerome N.
Partner: UNT Libraries Government Documents Department