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Formulas for the Elastic Constants of Plates With Integral Waffle-Like Stiffening

Description: Report presenting formulas for fifteen elastic constants associated with bending, stretching, twisting, and shearing of plates with closely spaced integral ribbing in a variety of configurations and proportions. Four coefficients are provided for each rib and the experimental means of determining them are described.
Date: August 10, 1953
Creator: Dow, Norris F.; Libove, Charles & Hubka, Ralph E.
Partner: UNT Libraries Government Documents Department
open access

Longitudinal Flight Characteristics of the Bell X-5 Research Airplane at 59 Degree Sweepback With Modified Wing Roots

Description: "In an attempt to improve the longitudinal stability characteristics of the Bell X-5 research airplane at 59 degrees sweepback, the wing-root leading edge was modified by replacing the original 52.5 degrees sweptback leading-edge fillets with rounded leading-edge fillets. The data obtained show that the longitudinal stability characteristics, as well as the buffet and drag characteristics, were unaffected by the modification" (p. 1).
Date: August 10, 1953
Creator: Martin, James A.
Partner: UNT Libraries Government Documents Department
open access

Free-Flight Longitudinal-Stability Investigation Including Some Effects of Wing Elasticity From Mach Numbers of 0.85 to 1.34 of a Tailless Missile Configuration Having a 45 Degree Sweptback Wing of Aspect Ratio 5.5

Description: Report presenting a free-flight longitudinal-stability investigation between Mach numbers of 0.85 and 1.34 to obtain the aerodynamic characteristics of a long-range, jet-propelled, ground-to-ground missile with a wing of aspect ratio 5.5, 45 degrees of sweepback, and taper ratio 0.4 on a body with a vertical tail. Two models with two different wing materials were flown. Results regarding trimmed flight, pitching flight, and aeroelastic calculations are provided.
Date: August 10, 1953
Creator: Arbic, Richard G. & Gillespie, Warren, Jr.
Partner: UNT Libraries Government Documents Department
open access

A Study of Efficiencies and Pressure Drop Characteristics of Air-Filtering Media

Description: Removal of particles from air is discussed in terms of three classes of filtering media--air-sampling, respirator, and air-cleaning. Plots of efficiency versus filtering velocity are presented. The pressure drop characteristics of the filters are discussed in terms of initial pressure drops of the clean filters, variations in pressure drop of the individual filters, and comparison of loading rates.
Date: August 10, 1953
Creator: Adley, F. E.; Scott, R. H. & Gill, W. E.
Partner: UNT Libraries Government Documents Department
open access

Diffusion of Stack Gases in Very Stable Atmospheres: Case II

Description: In 1949 Barad presented two solutions to the general diffusion equation. Basic in both solutions is the assumption that in very stable atmospheres a point source may be replaced by a vertical area of uniform concentration at a short distance downwind. This vertical area is considered to exist at the distance at which the plume finally "levels-off" and assumes a flat ribbon-like appearance. In addition if the distance over which diffusion takes place is limited to one or two miles and if only… more
Date: August 10, 1953
Creator: Barad, M. L. & Shorr, B.
Partner: UNT Libraries Government Documents Department
open access

Dynamics of Stagewise Extraction Columns

Description: A calculation method has been developed in order to correlate continuous-flow extraction results in mixer-settlers with rate data for batch experiments. This correlation utilizes dynamic extraction coefficients (E's) that are calculated from the rate data and the equilibrium extraction coefficients. The dynamic coefficients may then be used in stage-by-stage calculations, or their average values used in equations derived herein from the overall performance of center-fed columns.
Date: August 10, 1953
Creator: Hicks, T. E.; Rubin, B. & Vermeulen, Theodore
Partner: UNT Libraries Government Documents Department
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