Static Longitudinal Aerodynamic Characteristics at Transonic Speeds of a Lenticular-Shaped Reentry Vehicle
Lenticular-shaped reentry vehicle static longitudinal aerodynamic characteristics at transonic speeds
REENTRY VEHICLE↗
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STATIC STABILITY AND CONTROL CHARACTERISTICS AT LOW-SUBSONIC SPEEDS OF A LENTICULAR REENTRY CONFIGURATION
Static stability and control characteristics of manned lenticular reentry configuration at low subsonic speeds
STATIC STABILITY AND CONTROL↗
Influence of solar radiation pressure on orbital eccentricity of a gravity-gradient oriented lenticular satellite
Solar radiation pressure effect on orbital eccentricity of gravity gradient oriented lenticular satellite
GRAVITY GRADIENT SATELLITE↗
Structural considerations for an expandable lenticular satellite
Structure of expandable lenticular satellite for communications
COMMUNICATIONS SATELLITE↗
Feasibility study and preliminary design of gravity-gradient-stabilized lenticular test satellite Interim technical report, Jul. 1963 - Mar. 1964
Gravity gradient stabilized, lenticular satellite for passive communications
LENTICULAR BODY↗
Design studies of advanced lenticular passive communication satellites from low to synchronous orbit Report, May - Sep. 1965
Effects of variations in orbital altitude, lens radius of curvature, and lens included angle on physical characteristics of gravity gradient stabilized lenticular satellite configurations
SPACECRAFT STABILITY↗
Rice/Wilberforce gravity-gradient damping system
Rice/Wilberforce gravity gradient damping system applied to lenticular communications satellite
LENTICULAR BODY↗
Static Longitudinal Stability and Control Characteristics At A Mach Number of 1.99 of a Lenticular-Shaped Reentry Vehicle
An investigation has been made in the Langley 4- by 4-foot supersonic pressure tunnel at a Mach number of 1.99 to determine the longitudinal stability and control characteristics of a reentry model consisting of a lenticular-shaped body with two fin configurations (horizontal fins with end plates). Effects of deflecting the larger size fins as pitch-control surfaces were also investigated. The results indicate that the body alone was unstable from an angle of attack of 0 deg to about 55 deg where it became stable and remained so to 90 deg. The addition of fins provided positive longitudinal stability throughout the angle-of-attack range and increased the lift-drag ratio of the configuration. Reducing the horizontal-fin area at the inboard trailing edge of the fin had only a small effect on the aerodynamic characteristics of the vehicle for the condition of no fin deflection. Deflecting the fins, appeared to be an effective means of pitch control and had only a small effect on lift-drag ratio.
Jackson, Charles M., Jr.↗
The application of some lifting-body reentry concepts to missile design
The aerodynamic characteristics of some lifting-body concepts are examined with a view to the applicability of such concepts to the design of missiles. A considerable amount of research has been done in past years with vehicle concepts suitable for manned atmospheric-entry and atmospheric flight. Some of the concepts appear to offer some novel design approaches for missiles for a variety of missions and flight profiles, including long-range orbital/reentry with transatmospheric operation for strategic penetration, low altitude penetration, and battlefield tactical. The concepts considered include right triangular pyramidal configurations, a lenticular configuration, and various 75-degree triangular planform configurations with variations in body camber and control systems. The aerodynamic features are emphasized but some observations are also made relative to other factors such as heat transfer, structures, carriage, observability, propulsion, and volumetric efficiency.
Spearman, M. L.↗
The application of some lifting-body reentry concepts to missile design
The aerodynamic characteristics of some lifting-body concepts are examined with a view to the applicability of such concepts to the design of missiles. A considerable amount of research has been done in past years with vehicle concepts suitable for manned atmospheric-entry and atmospheric flight. Some of the concepts appear to offer some novel design approaches for missiles for a variety of missions and flight profiles, including long-range orbital/reentry with transatmospheric operation for strategic penetration, low altitude penetration, and battlefield tactical. The concepts considered include right triangular pyramidal configurations, a lenticular configuration, and various 75-degree triangular planform configurations with variations in body camber and control systems. The aerodynamic features are emphasized but some observations are also made relative to other factors such as heat transfer, structures, carriage, observability, propulsion, and volumetric efficiency.
Spearman, M. L.↗
The polar-ring galaxies NGC 2685 and NGC 3808B (VV 300)
Polar-ring galaxies (PRG) are among the most interesting examples of interaction between galaxies. A PRG is a galaxy with an elongated main body surrounded by a ring (or a disk) of stars, gas, and dust rotating in a near-polar plane (Schweizer, Whitmore, and Rubin, 1983). Accretion of matter by a massive lenticular galaxy from either intergalactic medium or a companion galaxy is usually considered as an explanation of the observed structure of PRG. In the latter case there are two possibilities: capture and merging of a neighbor galaxy, and accretion of mass from a companion galaxy during a close encounter. Two PRG formation scenarios just mentioned are illustrated here by the results of our observations of the peculiar galaxies NGC 2685 and NGC 3808B.
Reshetnikov, V. P.↗