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  Partner: UNT Libraries Government Documents Department
 Decade: 1950-1959
 Serial/Series Title: NACA Research Memorandums
Analysis of Meteorological Data Obtained During Flight in a Supercooled Stratiform Cloud of High Liquid-Water Content

Analysis of Meteorological Data Obtained During Flight in a Supercooled Stratiform Cloud of High Liquid-Water Content

Date: July 11, 1951
Creator: Perkins, Porter J. & Kline, Dwight B.
Description: Flight icing-rate data obtained in a dense and. abnormally deep supercooled stratiform cloud system indicated the existence of liquid-water contents generally exceeding values in amount and extent previously reported over the midwestern sections of the United States. Additional information obtained during descent through a part of the cloud system indicated liquid-water contents that significantly exceeded theoretical values, especially near the middle of the cloud layer.. The growth of cloud droplets to sizes that resulted in sedimentation from the upper portions of the cloud is considered to be a possible cause of the high water contents near the center of the cloud layer. Flight measurements of the vertical temperature distribution in the cloud layer indicated a rate of change of temperature with altitude exceeding that of the moist adiabatic lapse rate. This excessive rate of change is considered to have contributed to the severity of the condition.
Contributing Partner: UNT Libraries Government Documents Department
Preliminary Survey of Icing Conditions Measured During Routine Transcontinental Airline Operation

Preliminary Survey of Icing Conditions Measured During Routine Transcontinental Airline Operation

Date: December 16, 1952
Creator: Perkins, Porter J.
Description: Icing data collected on routine operations by four DC-4-type aircraft equipped with NACA pressure-type icing-rate meters are presented as preliminary information obtained from a statistical icing data program sponsored by the NACA with the cooperation of many airline companies and the United States Air Force. The program is continuing on a much greater scale to provide large quantities of data from many air routes in the United States and overseas. Areas not covered by established air routes are also being included in the survey. The four aircraft which collected the data presented in this report were operated by United Air Lines over a transcontinental route from January through May, 1951. An analysis of the pressure-type icing-rate meter was satisfactory for collecting statistical data during routine operations. Data obtained on routine flight icing encounters from.these four instrumented aircraft, although insufficient for a conclusive statistical analysis, provide a greater quantity and considerably more realistic information than that obtained from random research flights. A summary of statistical data will be published when the information obtained daring the 1951-52 icing season and that to be obtained during the 1952-53 season can be analyzed and assembled. The 1951-52 data already analyzed indicate that the quantity, ...
Contributing Partner: UNT Libraries Government Documents Department
A heated-wire liquid-water-content instrument and results of initial flight tests in icing conditions

A heated-wire liquid-water-content instrument and results of initial flight tests in icing conditions

Date: January 20, 1955
Creator: Neel, C. B.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Measurement of distortion in second experimental control rod for argonne naval reactor with constant transverse temperature gradient and uniform longitudinal temperature distribution

Measurement of distortion in second experimental control rod for argonne naval reactor with constant transverse temperature gradient and uniform longitudinal temperature distribution

Date: September 26, 1951
Creator: Lietzke, A. F. & Nagey, T. F.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Low-speed wind-tunnel tests of a 1/8-scale model of the bell d-188a vtol airplane

Low-speed wind-tunnel tests of a 1/8-scale model of the bell d-188a vtol airplane

Date: August 25, 1958
Creator: Mc Kinney, M. O. & Smith, C. C., Jr.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
An investigation of supersonic store interference in the vicinity of a 22 deg swept wing fuselage configuration at Mach numbers of 1.61 and 2.01

An investigation of supersonic store interference in the vicinity of a 22 deg swept wing fuselage configuration at Mach numbers of 1.61 and 2.01

Date: February 24, 1958
Creator: Geier, D. J.
Description: Pressure tunnel investigation of supersonic store interference in vicinity of 22 deg swept wing fuselage configuration at mach numbers 1.61 and 2.01.
Contributing Partner: UNT Libraries Government Documents Department
Transonic aerodynamic and trim characteristics of 1/15-scale models of the convair mx-1964 airplane with indented fuselage

Transonic aerodynamic and trim characteristics of 1/15-scale models of the convair mx-1964 airplane with indented fuselage

Date: January 1, 1953
Creator: Allis, A. E.; Foss, W. E., Jr. & Swihart, J. M.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
A comparison of flight-measured carrier- approach speeds with values predicted by several different criteria for 41 fighter-type airplane configurations

A comparison of flight-measured carrier- approach speeds with values predicted by several different criteria for 41 fighter-type airplane configurations

Date: May 8, 1958
Creator: Drinkwater, F. J., III; Schlaff, B. A. & White, M. D.
Description: Comparison of flight measured carrier-approach speeds with values predicted by several different criteria for 41 fighter aircraft configurations.
Contributing Partner: UNT Libraries Government Documents Department
Chemical and physical properties of a boron-carbon-hydrogen fuel z-244 /naca 55z8/

Chemical and physical properties of a boron-carbon-hydrogen fuel z-244 /naca 55z8/

Date: March 27, 1956
Creator: Buddie, M.; Cramer, P. M. & Spakowski, A. E.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Experimental Behavior of Pentaborane-Air Combustion Products During Expansion in a Convergent Divergent Nozzle

Experimental Behavior of Pentaborane-Air Combustion Products During Expansion in a Convergent Divergent Nozzle

Date: February 18, 1958
Creator: Branstetter, J. R. & Setze, P. C.
Description: In order to evaluate the post combustion behavior of boric oxide, pentaborane-air mixtures, burned to completion at a combustor pressure of 3 atmospheres, were expanded through a 7.1-inch-long convergent-divergent nozzle having a 4-inch-diameter throat and an exit-to-throat area ratio of 1.68. The experimentally determined thrust performance was in good agreement with the ideal equilibrium performance at stagnation temperatures of 3300 deg R and lower. The boric oxide vapor at the combustor exit required about 400 F deg supercooling before any condensed phase was observed. For a given thrust, fuel consumption was as much as 20 percent greater than predicted from vapor-pressure data for combustor outlet temperatures i n the vicinity of 3600 deg R. A similar result could be expected in full-scale engines, since the test combustor provided an unusually long dwell time and a highly turbulent environment. During the expansion process, the vapor (when present) did not condense to the extent predicted for an equilibrium expansion process. Moreover, condensation was observed only i n the form of small, abrupt phase changes i n the subsonic flow near the throat. Friction, due to liquid boric oxide films on the nozzle surfaces, was negligible when the surface temperature was above 800 ...
Contributing Partner: UNT Libraries Government Documents Department
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