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Effect of aspect ratio on the air forces and moments of harmonically oscillating thin rectangular wings in supersonic potential flow

Description: This report treats the effect of aspect ratio on the air forces and moments of an oscillating flat rectangular wing in supersonic potential flow. The linearized velocity potential for the wing undergoing sinusoidal torsional oscillations simultaneously with sinusoidal vertical translations is derived in the form of a power series in terms of a frequency parameter. The series development is such that the differential equation for the velocity potential is satisfied to the required power of the frequency parameter considered and the linear boundary conditions are satisfied exactly. The method of solution can be utilized for other plan forms, that is, plan forms for which certain steady-state solutions are known.
Date: January 6, 1950
Creator: Watkins, Charles E.
Partner: UNT Libraries Government Documents Department

[Group sits at table]

Description: Photograph of a television set where four men sit at a table and a woman stands and speaks to them. The men wear formal suits and the woman wears a formal dress. The television set they sit on is a kitchen with camera operators in the foreground.
Date: January 6, 1950
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections

Measurements of Aerodynamic Characteristics of a 35 Degree Sweptback NACA 65-009 Airfoil Model With 1/4-Chord Bevelled-Trailing-Edge Flap and Trim Tab by the NACA Wing-Flow Method

Description: The third investigation in a series to determine the fundamental characteristics of trailing-edge controls at transonic speeds. This particular report uses a 35 degree sweptback untapered airfoil model with an aspect ratio of 3 and a flap with a bevelled trailing edge with a trailing-edge angle of 23 degrees. Results regarding lift, pitching-moment, and hinge-moment characteristics are provided.
Date: January 6, 1950
Creator: Johnson, Harold I. & Brown, B. Porter
Partner: UNT Libraries Government Documents Department

Investigation of the NACA 4-(4)(06)-057-45a and NACA 4-(4)(06)-57-45b Two-Blade Swept Propellers at Forward Mach Numbers to 0.925

Description: Report presenting an investigation of the NACA 4-(4)(06)-057-45A and NACA 4-(4)(06)-057-45B two-blade swept propellers in the high-speed tunnel at blade angles of 25 degrees, 55 degrees, 60 degrees, 65 degrees, and 70 degrees. The swept propellers were compared with straight propellers and were found to be 10 percent more efficient at a forward Mach number of 0.85 for the design blade angle of 60 degrees. Results regarding the effect of forward Mach number, blade sweep, advance ratio, and constant power coefficient on efficiency are also provided.
Date: February 6, 1950
Creator: Delano, James B. & Harrison, Daniel E.
Partner: UNT Libraries Government Documents Department

Longitudinal Trim and Drag Characteristics of Rocket-Propelled Models Representing Two Airplane Configurations

Description: Report discussing an investigation of the longitudinal trim and drag characteristics of two airplane configurations through the transonic speed range. One configuration had a thin straight wing and tail and one had a thicker 35 degree sweptback wing and a 46 degree sweptback tail on the same fuselage-fin arrangement. Information about the control effectiveness and stability and application to a full-scale airplane is also provided.
Date: February 6, 1950
Creator: Parks, James H. & Mitchell, Jesse L.
Partner: UNT Libraries Government Documents Department

P Division monthly report, January 1950

Description: This progress report discusses the activities of the P Division for the month of January 1950. The B, D, F and H pilan operated throughout the month except for outages listed under Area Activities. Power levels were as follow: B pile -- 275 megawatts (MW) D pile -- 305 MW, F pile -- 275 MW increased to 305 MW during the month, and H pile -- 275 MW increased to 330 MW during the month. The piles operated with a time operated'' efficiency of 88.8%. A total of 53.07 tons of metal at an average of 91.2% of the current goal concentration was discharged from the piles during the month. A new record canning yield of 93.9% for 4 inch canned slugs was established during January.
Date: February 6, 1950
Creator: Lee, E.P.
Partner: UNT Libraries Government Documents Department

Temperature survey of the wake of two closely located parallel jets

Description: Report presenting a temperature survey made in the wake of two closely located parallel jets emerging into the atmosphere from two types of twin convergent nozzles. Results regarding the twin unshrouded nozzles and twin nozzles with twin geometry-simulated shrouds are provided.
Date: February 6, 1950
Creator: Sloop, John L. & Morrell, Gerald
Partner: UNT Libraries Government Documents Department

EXPERIMENTS ON N-P SCATTERING WITH 260 MEV NEUTRONS

Description: Neutrons produced by 350 Mev protons impinging on beryllium are scattered by hydrogen. We measure the differential scattering cross section as a function of the scattering angle. Results are summarized in Fig. 3 of the paper.
Date: March 6, 1950
Creator: Kelly, E.; Leith, C.; Segre, E. & Wiegand, C.
Partner: UNT Libraries Government Documents Department

[Book open to photograph of Valère basilica]

Description: Photograph of an easel holding a book open to show two pictures of landscapes of the municipality of Sion in Switzerland. On the right is a picture of Valère basilica, a fortified church on a hill. The captions for the two pictures are in French and German.
Date: April 6, 1950
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections

Experimental investigation of thrust augmentation of 4000-pound-thrust axial-flow-type turbojet engine by interstage injection of water-alcohol mixtures in compressor

Description: Report presenting an experimental investigation of thrust augmentation of a 4000-pound-thrust axial-flow-type turbojet engine by interstage injection of water-alcohol mixtures into the compressor at sea-level, zero-ram conditions. the number, size, and arrangement of interstage nozzles were varied to produce a satisfactory augmentation system of minimum complication. Results regarding the unaugmented performance with and without interstage-injection nozzles, augmented performance with three-stage system, augmented performance with other injection systems, temperature surveys, and engine operation are provided.
Date: April 6, 1950
Creator: Povolny, John H.; Useller, James W. & Chelko, Louis J.
Partner: UNT Libraries Government Documents Department

Preliminary report on human excretion of tritium

Description: Six subjects received a few millicuries Of tritium by inhalation of isotopically labeled hydrogen gas. The concentration of H{sup 3} in the urine of these individuals has been followed for a period of some 15 days. The rate of excretion of the tritium was found to be constant for a given subject but to vary considerably, among individuals. Data on five individuals arbitrarily normalized to coincide at zero time showed a range in biological half-life from about 9 days to nearly 13 days. These values are to be compared with the value calculated for the Chalk River ``Standard Man`` of 13.5 days, assuming the tritim to be confined to the body water.
Date: April 6, 1950
Creator: Anderson, E.C. & Pinson, E.
Partner: UNT Libraries Government Documents Department

Quarterly Report for General Research January - February - March, 1950 (Deleted Version)

Description: This report discusses the following topics: (1) radium separation from K-65 residues - laboratory scale; (2) fractional crystallization studies barium - radium; (3) the concentration of radium from barium rich mixtures; (4) the coprecipitation of lead and radium sulfate; (5) the separation of radium and barium by ion-exchange; (6) engineering work on separation of radium from K-65 residues; (7) silica removal, corrosion tests; (8) radon counting; (9) the design of equipment for the measurements of radon in breath and air samples; and (10) proportional counting of radioactive gas.
Date: June 6, 1950
Partner: UNT Libraries Government Documents Department

Low-speed lateral stability and aileron-effectiveness characteristics at a Reynolds number of 3.5 x 10(exp 6) of a wing with leading-edge sweepback decreasing from 45 degrees at the root to 20 degrees at the tip

Description: Report presenting results of an investigation of the lateral stability and aileron-effectiveness characteristics of a wing with the leading-edge sweepback decreasing from 45 degrees at the root to 20 degrees at the tip. Results regarding the static lateral stability characteristics and aileron characteristics are provided.
Date: July 6, 1950
Creator: Lange, Roy H. & McLemore, Huel C.
Partner: UNT Libraries Government Documents Department

CALIFORNIUM ISOTOPES FROM BOMBARDMENT OF URANIUM WITH CARBONIONS

Description: The recent production and identification of isotopes of elements with atomic numbers up to six higher than the target element through bombardment with hexapositive 120-Mev carbon ions made it seem worthwhile to apply this technique to the transuranium region. Accordingly, small pieces of natural uranium metal (about 0.5 mil thick and 205 cm by 0.6 cm area) were irradiated in the internal carbon ion beam in the Berkeley 60-inch cyclotron. Following the irradiations, the uranium was dissolved in dilute hydrochloric acid containing hydrogen peroxide and a transplutonium fraction was isolated through the use of lanthanum fluoride, and lanthanum hydroxide precipitation steps followed by the ion exchange adsorption column procedure in which concentrated hydrochloric acid is used to separate the tripositive actinide elements from the rare earth elements. The transplutonium fractions in hydrochloric acid were evaporated as weightless films on platinum plates which were placed in the ionization chamber of the 48 channel pulse analyzer apparatus in order to measure the yield and energies of any alpha-particles which might be present. In the best experiment at about one hour after the end of the 90-minute bombardment, some 50 disintegrations per minute of the distinctive 7.1-Mev alpha-particles of Cf{sup 244} were observed to be present and to decay with the 45-minute half-life. The Cf{sup 244} was presumably formed by the reaction U{sup 238}(C{sup 12},6n). After the decay of the alpha-particles due to Cf{sup 244}, about five disintegrations per minute of alpha-particles with 6.8-Mev energy was observed and this alpha-radioactivity decayed with a half-life of about 35 hours. A consideration of the systematics of alpha-radioactivity leads us to the view that this activity is due to the new isotope Cf{sup 246} formed by the reaction U{sup 238}(C{sup 12},4n) . The measured half-life agrees with the expected alpha half-life for the observed energy for ...
Date: September 6, 1950
Creator: Ghiorso, A.; Thompson, S.G.; Street, K. Jr. & Seaborg, G.T.
Partner: UNT Libraries Government Documents Department

[Forest scene from puppet show]

Description: Photograph of a forest scene from the The Dean Raymond Puppet Show featuring two puppets. The canine puppet with an eyepatch is also wearing a leopard-print costume and holds a tin cup.
Date: September 6, 1950
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections

Low-Speed Static Stability Characteristics of a Canard Model with a 45 Degree Sweptback Wing and a 60 Degree Triangular Horizontal Control Surface

Description: Memorandum presenting an investigation of the low-speed static stability characteristics of a canard model with a 45 degree sweptback wing and a 60 degree triangular horizontal control surface. Results regarding longitudinal stability and control and lateral stability and control are provided.
Date: September 6, 1950
Creator: Draper, John W.
Partner: UNT Libraries Government Documents Department

PHYSICS DIV. QUARTERLY REPORT, MAY, JUNE, JULY, 1950

Description: The X-ray Spectrum Produced by 322 Mev Electrons Striking a Platinum Target. The differential energy spectrum of the photons produced by 322 Mev electrons striking a 20 mil platinum target was measured by observing the energy of 3467 pairs produced in a one mil thick lead foil in a Wilson cloud chamber in a magnetic field of 10,000 gauss. The spectrum is found to agree with that predicted by the Bethe-Heitler bremsstrahlung theory using a Thomas-Fermi model with suitable corrections for the thickness of the target. The energy of the 322 Mev electrons was determined by the spectrum of the photons observed in this experiment. Apparatus used and the experimental data and results obtained are reported fully in UCRL-660.
Date: September 6, 1950
Partner: UNT Libraries Government Documents Department

[Puppet show forest scene]

Description: Photograph of a forest scene from the The Dean Raymond Puppet Show featuring two puppets. The canine puppet with an eyepatch and the longhorn puppet wearing a plaid shirt hold a long "saw" between them and appear to have cut down a tree. A miniature tree log sits in front of them on the puppet stage.
Date: September 6, 1950
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections