UNT Libraries Government Documents Department - 33 Matching Results

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Aerodynamic Characteristics of an Airfoil-Forebody Swept Flying-Boat Hull With a Wing and Tail Swept Back 51.3 Degrees at the Leading Edge

Description: Report discussing an investigation of the aerodynamic characteristics of an airfoil-forebody swept flying boat hull with a wing and tail swept back 51.3 degrees at the leading edge. The swept hull's minimum drag coefficient was about the same as the parent model or streamline model. Various combinations of flaps were also utilized.
Date: September 9, 1949
Creator: Naeseth, Rodger L. & MacLeod, Richard G.
Item Type: Refine your search to only Report
open access

Calibration Tests of a Japanese Log Rodmeter

Description: A Japanese log rodmeter of the rotating-vane impeller type, with a commutator on the impeller shaft, was calibrated in Langley tank no. 1. The rotational speed of two impellers was determined for forward speeds up to 24 knots at angles of yaw up to ?10 0 . In general, the rotational speeds of two apparently identical impellers tested in the rodmeter decreased with increasing yaw angle, right yaw causing a greater decrease than left yaw. The difference in calibration between the two impellers wa… more
Date: March 9, 1949
Creator: Mottard, Elmo J.
Item Type: Refine your search to only Report
open access

The control of polycythemia by marrow inhibition

Description: Experimental use of sodium radiophosphate (P32)in treatment of polycythemia is described. Treatment history is 66 patients treated with P32 alone, 32 patients treated with P32 followed within 4 months by venesections, 21 patients treated with P32 followed more than 4 months later by venesections, 6 patients treated exclusively by venesections, and 9 patients treated and followed elsewhere.
Date: August 9, 1949
Creator: Lawrence, J.H.
Item Type: Refine your search to only Report
open access

Determining Load Correction and Correcting Frequency Compensated Constant Voltage (FCCV) Sola Transformers

Description: By test duplicating actual operating conditions the average load was found to have a power factor of 95 percent and to be about 75 percent rated load. Since the Sola transformers must be operating into a load having a power factor of 90 percent and about 85 percent rated to attain proper output voltage, power factor corrective networks consisting of inductance and resistance in series were paralleled with the load. When these networks were added, the desired output voltage was attained. Several… more
Date: September 9, 1949
Creator: Zinn, T. L.
Item Type: Refine your search to only Report
open access

Ditching Tests of a 1/18-Scale Model of the Lockheed Constellation Airplane with Speedpak Attached

Description: Results of previous model ditching tests of the Lockheed Constellation airplane are reported. Further model tests have been made to determine the probable ditching characteristics and the proper ditching technique for the airplane with the Speedpak attached. This paper presents the results of these tests. Design information was furnished by the Lockheed Aircraft Corporation. A three-vies drawing of the airplane with the Speedpak attached is shown. The tests were made in calm water at the Langle… more
Date: August 9, 1949
Creator: Fisher, Lloyd J. & Thompson, William C.
Item Type: Refine your search to only Report
open access

Effect of Air Cooling of Turbine Disk on Power and Efficiency of Turbine from Turbo Engineering Corporation TT13-18 Turbosupercharger

Description: "An investigation was conducted to determine the effect of turbine-disk cooling with air on the efficiency and the power output of the radial-flow turbine from the Turbo Engineering Corporation TT13-18 turbosupercharger. The turbine was operated at a constant range of ratios of turbine-inlet total pressure to turbine-outlet static pressure of 1,5 and 2.0, turbine-inlet total pressure of 30 inches mercury absolute, turbine-inlet total temperature of 12000 to 20000 R, and rotor speeds of 6000 to … more
Date: June 9, 1949
Creator: Berkey, William E.
Item Type: Refine your search to only Report
open access

Effect of Sweepback on the Low-Speed Static and Rolling Stability Derivatives of Thin Tapered Wings of Aspect Ratio 4

Description: Report discussing an investigation to determine the effect of sweepback on the static and rolling stability derivatives of a series of wings with a taper ratio of 0.6 and an aspect ratio of 4. The influence on the straight-flow characteristics, rolling-flow characteristics, and aileron characteristics are provided.
Date: August 9, 1949
Creator: Letko, William & Wolhart, Walter D.
Item Type: Refine your search to only Report
open access

The effect of the propeller slipstream on the characteristics of submerged inlets

Description: Report presenting a wind-tunnel investigation to determine the effect of propeller operation on the characteristics of submerged inlets. The tests were performed with a model of a hypothetical fighter airplane powered by a turbine-propeller unit. The propeller had eight blades with thin airfoil shanks and dual rotation and the submerged inlets were placed in the fuselage behind the propeller and forward of the wing.
Date: September 9, 1949
Creator: Delany, Noel K.
Item Type: Refine your search to only Report
open access

The effects of scale and test technique on the validity of small-scale measurements of the aerodynamic characteristics of a wing with the leading edge swept back 63 degrees

Description: Report presenting the lift and pitching-moment characteristics of two wings of the same plan form measured over a range of Mach and Reynolds numbers using the wing-flow method. One wing had a symmetrical airfoil section and no twist, while the other was cambered and twisted to support a uniform load distribution at a lift coefficient of 0.25 at Mach number 1.5. A comparison with previous testing is also provided.
Date: December 9, 1949
Creator: Rolls, L. Stewart
Item Type: Refine your search to only Report
open access

An Electric Thrust Meter Suitable for Flight Investigation of Propellers

Description: A lightweight instrument that utilizes resistance-wire electric strain gases to measure propeller-shaft thrust has been developed. A wind-tunnel investigation on a propeller installed, on a single-engine pursuit airplane showed that the instrument gave a reliable indication of propeller-shaft thrust to an accuracy of +/-2 percent within its calibrated range. No attempt was made to determine the relation of indicated shaft thrust to net propeller thrust.
Date: May 9, 1949
Creator: Perkins, Porter J., Jr. & Millenson, Morton B.
Item Type: Refine your search to only Report
open access

Events of importance for week ending September 7, 1949

Description: No administrative or operations significant events are reported. Construction in the pile areas, separations areas, and the technical center is reported. The Southern Railroad connection, Richland paving and related work, and housing work is described. Personnel and visitor data is presented.
Date: September 9, 1949
Creator: Schlemmer, F. C.
Item Type: Refine your search to only Report
open access

Experimental investigation of liquid diborane - liquid oxygen propellant combination in 100-pound-thrust rocket engine

Description: Report presenting the specific impulse of liquid diborane and liquid oxygen over a range of mixture ratios in a 100-pound-thrust rocket engine operating at a combustion-chamber pressure of 300 pounds per square inch absolute. A faired curve through the experimental data had approximately the same shape as the theoretical curve.
Date: May 9, 1949
Creator: Rowe, William H.; Ordin, Paul M. & Diehl, John M.
Item Type: Refine your search to only Report
open access

Final Engineering Report Covering Austin Beta-Gamma Hand and Foot Checker

Description: Abstract: "This final report discusses the project objectives and the manner in which these were attained in connection with the design and manufacture of the Austin Beta-Gamma Hand and Foot checker (Fig 1). Improvements incorporated to conform the equipment to modern production methods, as well as practical changes to achieve automatic operation and increased stability and to facilitate and simplify maintenance procedures, are covered in detail. The report also includes photographs (Figs. 2 … more
Date: November 9, 1949
Item Type: Refine your search to only Report
open access

Investigation of Some Turbulent-Boundary-Layer Velocity Profiles at a Tunnel Wall with Mach Numbers up to 1.2

Description: Report presenting turbulent-boundary-layer profiles at large Reynolds numbers and with Mach numbers up to 1.2. In this investigation, velocity profile shapes were substantially unaffected by compressibility. Results regarding the temperature considerations, velocity profiles, and turbulent boundary layer under normal shock are provided.
Date: November 9, 1949
Creator: Tulin, Marshall P. & Wright, Ray H.
Item Type: Refine your search to only Report
open access

Life Tests of Tungsten and Tantalum Filaments in Ion Gauges

Description: Results of an investigation carried on for the following purposes: (1) To determine the relative life of filaments when operated at low emission (low temperatures) as compared to those operated at high emission values. (2) To determine the nature of the dependence of life upon the initial diameter of the filament. (3) To determine the effect of varying concentrations of water vapor and air upon the life of the filaments. (4) To determine the relative life characteristics of tantalum as compare… more
Date: August 9, 1949
Creator: Bush, W. E.
Item Type: Refine your search to only Report
open access

Limits of Inflammability and Ignition Temperatures of Hexone in Air and in Other Gaseous Atmospheres

Description: The following report summarizes the data taken from a series of measurements on the combustion and ignition properties of hexone. The experiments were taken at the Bureau of Mines Central Experiment Station by their personnel, and the samples were given to them by KAPL and Hanford.
Date: September 9, 1949
Creator: Alter, H. Ward
Item Type: Refine your search to only Report
open access

Low-speed static longitudinal stability characteristics of a canard model having a 60 degrees triangular wing and horizontal tail

Description: Report presenting an investigation of the low-speed, power-off static longitudinal stability and control characteristics of a canard model with a triangular wing and horizontal tail in the free-flight tunnel. Results regarding the horizontal tail used to overcome change in stability and horizontal tail used for longitudinal control are provided.
Date: November 9, 1949
Creator: Bates, William R.
Item Type: Refine your search to only Report
open access

Performance of Single-Stage Turbine of Mark 25 Torpedo Power Plant with Two Nozzles and Three Rotor-Blade Designs

Description: From Summary: "A single-stage modification of the turbine from a Mark 25 torpedo power plant was investigated to determine the performance with two nozzles and three rotor-blade designs. The performance was evaluated in terms of brake, rotor, and blade efficiencies at pressure ratios of 8, 15 (design), and 20. The blade efficiencies with the two nozzles are compared with those obtained with four other nozzles previously investigated with the same three rotor-blade designs."
Date: September 9, 1949
Creator: Schum, Harold J. & Whitney, Warren J.
Item Type: Refine your search to only Report
open access

Preliminary Investigation of 3-Inch Slotted Transonic Wind-Tunnel Test Sections

Description: Memorandum describing preliminary investigations of two 3-inch-diameter slotted test sections over a range of pressure ratios from 1.3 to 10.0. The two test sections varied based on the number of slots and amount of open space, but they showed no appreciable difference in performance. Results regarding the slots with no chamber around the test section and with a closed chamber around the test section are provided.
Date: September 9, 1949
Creator: Bates, George P.
Item Type: Refine your search to only Report
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