UNT Libraries Government Documents Department - 24,742 Matching Results

Search Results

Summary of scale-model thrust-reverser investigation

Description: An investigation was undertaken to determine the characteristics of several basic types of thrust-reverser. Models of three types, target, tailpipe cascade, and ring cascade, were tested with unheated air. The effects of design variables on reverse-thrust performance, reversed-flow boundaries, and thrust modulation characteristics were determined.
Date: December 16, 1955
Creator: Povolny, John H.; Steffen, Fred W. & McArdle, Jack G.

Summary of Section Data on Trailing-Edge High-Lift Devices

Description: A summary has been made of available data on the characteristics of airfoil sections with trailing-edge high-lift devices. Data for plain, split, and slotted flaps are collected and analyzed. The effects of each of the variables involved in the design of the various types of flap are examined and, in cases where sufficient data are given, optimum configurations are deduced. Wherever possible, the effects of airfoil section, Reynolds number, and leading-edge roughness are shown. For single and double slotted flaps, where a great mass of unrelated date are available, maximum lift coefficients of a large number of configurations are presented in tables.
Date: August 20, 1948

Summary of section data on trailing-edge high-lift devices

Description: "A summary has been made of available data on the characteristics of airfoil sections with trailing-edge high-lift devices. Data for plain, split, and slotted flaps are collected and analyzed. The effects of each of the variables involved in the design of the various types of flap are examined and, in cases where sufficient data are given, optimum configurations are deduced. Wherever possible, the effects of airfoil section, Reynolds number, and leading-edge roughness are shown. For single and double slotted flaps, where a large amount of unrelated data are available, maximum lift coefficients of many configurations are presented in tables" (p. 1).
Date: 1949
Creator: Cahill, Jones F.

Summary of Some Current and Possible Future Environmental Problems Related to Geology and Hydrology at Memphis, Tennessee

Description: From introduction: This report summarizes information concerning many aspects of the geology and hydrology at Memphis, Tennessee. It also outlines some of the current problems related to the local geology and hydrology or ones that may arise as a result of urbanization and industrialization of the area.
Date: October 1976
Creator: Parks, William S. & Lounsbury, Richard W.

Summary of some effective aerodynamic twisting-moment coefficients of various wing-control configurations at Mach numbers from 0.6 to 1.7 as determined from rocket-powered models

Description: A summary of some effective aerodynamic twisting-moment coefficients of various wing-control configurations for use at a range of Mach numbers. The values obtained were determined by the combined use of experimentally determined free-flight data and subsonic aerodynamic theory.
Date: January 22, 1952
Creator: Strass, H. Kurt

Summary of some rocket-model investigations of effects of wing aspect ratio and thickness on aileron rolling effectiveness including some effects of spanwise aileron location for sweptback wings with aspect ratio of 8

Description: Report presenting the rolling effectiveness of 0.2-chord, trailing-edge ailerons on high-aspect-ratio sweptback wings over a range of Mach numbers. Some effects of spanwise aileron location on rolling effectiveness were measured by testing ailerons on the inboard half, the outboard half, and the full length of the exposed wings.
Date: February 17, 1954
Creator: Strass, H. Kurt

Summary of spin and recovery characteristics of 12 models of flying-wing and unconventional-type airplanes

Description: Report presenting a compilation of free-spinning model results of investigations of the spin and recovery characteristics of 12 flying-wing and unconventional-type designs. Dimensional data, mass data, and three-view drawings of the models that correspond to each of the 12 airplane designs are provided. Results regarding erect spins, inverted spins, and spin-recovery parachutes are also provided.
Date: March 1, 1951
Creator: Stone, Ralph W., Jr. & Hultz, Burton E.

Summary of stall-warning devices

Description: From Summary: "The principles involved in the operation of several types of stall-warning devices are described and conditions under which difficulty may be experienced are pointed out. In the discussion, stall-warning devices are grouped as special stall-sensing devices and angle-of-attack-sensing devices. Methods of transmitting the warning to the pilot are also discussed. Some specific examples of stall-warning devices are illustrated and described."
Date: May 1952
Creator: Zalovcik, John A.

Summary of subsonic-diffuser data

Description: Report presenting a review of subsonic-diffuser data, which was reduced to certain appropriate performance coefficients and presented as functions of the significant geometric and flow variables. The report is divided into the following sections: performance at low speeds, the effect of increasing the inlet speed up to choking Mach numbers, illustrations of the effectiveness of boundary-layer controls, and illustrations of the effects of distorted inlet velocity distributions at subsonic speeds.
Date: October 12, 1956
Creator: Henry, John R.; Wood, Charles C. & Wilbur, Stafford W.

Summary of the Aerodynamic Characteristics and Flying Qualities Obtained from Flights of Rocket-Propelled Models of an Airplane Configuration Incorporating a Sweptback Inversely Tapered Wing at Transonic and Low-Supersonic Speeds

Description: From Summary: "Flight tests have been conducted on rocket-propelled models of an airplane configuration incorporating a sweptback wing with inverse taper to investigate the drag, stability, and control characteristics at transonic and supersonic speeds. The models were tested with a conventional tail arrangement in the Mach number range from 0.55 to 1.2. In addition to the various aerodynamic parameters obtained, the flying qualities were computed for a full-scale airplane with the center-of-gravity location at 18 percent of the mean aerodynamic chord. Also, included in this investigation are drag measurements made on relatively simple fixed-control models tested with both conventional and V-tail arrangements."
Date: September 7, 1950
Creator: Mitcham, Grady L. & Blanchard, Willard S., Jr.

Summary of the APDA Fuel Development Programs

Description: Report issued by the APDA over fuel development programs. Designs for fast breeder reactors, safety tests, and methods are presented and discussed. This report includes tables, illustrations, and photographs.
Date: April 1961
Creator: Blessing, W. G.; Busch, J. S.; Duffy, J. G.; Hennig, R. J.; Jens, W. H.; Knight, F. W. et al.

A summary of the drag and longitudinal trim at low lift of the North American YF-100A airplane at Mach numbers from 0.75 to 1.77 as determined by flight tests of 0.11-scale rocket models

Description: Report presenting longitudinal trim and drag at low lift of the North American YF-100A airplane at a range of Mach numbers as obtained with rocket-propelled models for an airplane, with the horizontal tail removed, and with wing removed conditions. Results regarding drag, longitudinal trim, longitudinal stability, and flutter and buffet are provided.
Date: January 29, 1954
Creator: Blanchard, Willard S., Jr.

Summary of the Flight Conditions and Maneuvers in Which Maximum Wing and Tail Loads Were Experienced on a Swept-Wing Fighter Airplane

Description: Memorandum presenting wing and tail-load data on a swept-wing airplane to determine the flight conditions and maneuvers in which maximum wing and tail loads were experienced, and, where pertinent, to relate these loads to the important stability and control changes that occurred. The results indicated that maximum wing loads and bending moments would be expected at relatively low Mach numbers. With increasing Mach number, a relieving effect on the wing-panel loading coefficients was noted, which appears to be due to premature flow separation on the outboard wing sections.
Date: March 30, 1955
Creator: Sadoff, Melvin

A Summary of the Ground-Water Hydrology of the Area Between the Las Vegas Valley and the Amargosa Desert, Nevada: with Special Reference to the Effects of Possible New Withdrawals of Ground Water

Description: Introduction: The United States Atomic Energy Commission is considering the establishment of a townsite in the vicinity of Mercury, Nevada, to facilitate operations at the Nuclear Rocket Development Station on the Nevada Test Site.
Date: September 1963
Creator: Winograd, Isaac Judah

Summary of the lift, drag, and stability of 1/10-scale rocket-boosted models of the McDonnell XF3H-1 airplane for a Mach number range of 0.6 to 1.4 as affected by the operation of extensible rocket racks

Description: Report discussing an investigation of the McDonnell XF3H-1 with models to determine the aerodynamic effects of operating internally stowed extensible rocket racks during transonic flight. Information about the flutter, static longitudinal stability, dynamic longitudinal stability, static directional stability, trim, drag, and effect of rocket racks on aerodynamic characteristics of the model is provided.
Date: January 26, 1954
Creator: Crabill, Norman L. & McFall, John C., Jr.

Summary of the lift, drag, and stability of 1/10-scale rocket-boosted models of the McDonnell XF3H-1 airplane for a Mach number range of 0.6 to 1.4 as affected by the operation of extensible rocket racks : TED No. NACA DE 351

Description: Report presenting a flight investigation using two rocket-boosted scale models of the McDonnell XF3H-1 airplane to determine the aerodynamic effects of operating internally stowed extensible rocket racks during transonic flight. Operation of the racks generally had only a small effect on the aerodynamic characteristics with the exception of drag.
Date: January 26, 1954
Creator: Crabill, Norman L. & McFall, John C., Jr.