Briefs: Mechanical & Fluid Systems
A report describes Martian landing balls, which are under development for use in delivering scientific payloads to Mars. Martian landing balls are related to other soft-landing devices that resemble beach balls and that have been described in several previous NASA Tech Briefs articles. They are also related to the Zorb...
Briefs: Physical Sciences
A new method for assessing and communicating aviation in-flight icing hazards has been proposed. This methodology creates a simple numerical index for quantifying hazard severity. The index...
Briefs: Motion Control
Measurement and control systems based on microwave radiometers would be used to prevent unstarts in the next generation of high-speed (up to mach 2.4) civil-transport airplanes, according to a...
Briefs: Software
The DataSlate computer program is being developed to help educators and students gain access to, view, manipulate, and otherwise interact with sets of planetary and other scientific data via the Internet or via local data-storage facilities. DataSlate will be especially useful for displaying...
Briefs: Photonics/Optics
Infrared-sensor systems for real-time detection of accretion of ice on helicopter rotor blades are undergoing development. By providing early warnings of icing conditions, these systems...
Briefs: Physical Sciences
A report proposes ultralight balloon systems to carry a 10-kg payload, including scientific instruments for exploring the atmospheres of Uranus and Neptune. The system masses to be transported to those planets would be kept low by not transporting balloon-inflating gases. Each system...
Briefs: Physical Sciences
Biomorphic gliders are small robotic microflyers proposed for use in scientific exploration of planetary atmospheres and terrains that capture some key features of insect and bird flight. Biomorphic gliders as biomorphic...
Briefs: Mechanical & Fluid Systems
Extensive redundancy is designed into aircraft flight-control systems to ensure a low probability of failure. During recent years, however, major failures of flight-control systems have...
Briefs: Physical Sciences
The NASA Dryden DC-8 Airborne Science Laboratory (see Figure 1) performs research around the globe, recently in support of the SAGE III Ozone Loss and Validation Experiment (SOLVE). This...
Briefs: Information Technology
A method to predict the onset of a limit cycle for an aeroelastic testbed has been developed. The prediction is based on wavelet processing of measurement data that have been recorded under various...
Briefs: Mechanical & Fluid Systems
The tail boom of a single-rotor helicopter is subjected to a complex flow field that includes the wakes of the main and tail rotors, the freestream, and the wake from the forward...
Briefs: Robotics, Automation & Control
A data system generates information on the position and orientation of a pointing instrument (e.g., a telescope or a laser) that could be mounted on a moving platform (e.g., an aircraft) and...
Briefs: Robotics, Automation & Control
An improved secondary wing system of the canard type has been invented to improve performance and increase efficiency of airplanes capable of flight at supersonic and high subsonic speeds. Canards, including small...
Briefs: Software
Accurately and efficiently predicting the unsteady dynamics of coupled, fluid-structure systems significantly reduces the cost of designing, testing, and maintaining fixed-wing aircraft, rotorcraft, and turbomachinery. It also improves safety. Organizations can realize substantial savings by understanding...
Briefs: Materials
"ACE" (for "advanced ceramic engineered") denotes a type of coating mate-rial that increases the ability of flexible thermal-insulation blankets to resist erosion. Developed for use on the insulating blankets on the space shuttle orbiters, these coating materials could also be used on similar...
Briefs: Test & Measurement
Compact instruments, similar in appearance to common personal pagers, have been proposed for warning aircraft crewmembers that cabin air pressure has decreased to a potentially dangerous level. An instrument of this type, called a "personal cabin pressure monitor and warning system" (PCPMWS), implements a warning...
Briefs: Mechanical & Fluid Systems
Insulating tiles with interlocking shaped gaps have been developed for use in protecting the leading edges of the wings of aerospacecraft against excessive heating during hypersonic flight...
Briefs: Mechanical & Fluid Systems
A proposed magnetic-coupling scheme would afford additional degrees of freedom to optimize the designs of gas-driven catapults or launchers. The scheme could be applied to gas guns in diverse applications, including launching spacecraft or aircraft, propelling various objects at high speeds along the...
Briefs: Physical Sciences
NASA Dryden Flight Research Center has ruggedized and qualified an inexpensive commercial off-the-shelf (COTS) oxygen sensor that accurately and reliably aids assessment, in flight...
Briefs: Physical Sciences
Fiber-optic-coupled differential-pressure transducers are being developed for use in hot, harsh environments like those in the cores of aircraft turbine engines. The prior approach to...
Briefs: Electronics & Computers
Two airborne spectrum analyzers were developed for acquiring dynamic data, characterized by frequencies up to 25 kHz, from a hypersonic-crossflow-transition experiment aboard the air-launched...
Briefs: Mechanical & Fluid Systems
An apparatus called a "personal motion platform" (PMP) is undergoing development for use in adding the sensations of motion to computer-controlled simulated environments of the type now popularly known as...
Briefs: Electronics & Computers
A low-power, miniature Doppler lidar instrument is being developed for use in measuring opacity (from dust) and wind profiles in the Martian atmosphere. The instrument could also be used on Earth to measure turbulence in the atmospheric boundary layer, for assessments of urban and regional air...
Briefs: Physical Sciences
A research project now underway addresses the concept of utilizing stratospheric mountain waves to soar to high altitudes in sailplanes. Stratospheric mountain waves are mountain waves that...
Briefs: Physical Sciences
A computer program (see figure) has been developed to serve as a time- and cost-effective means of automating thermal analyses of such hypersonic flight systems as the space shuttle orbiter, the...
Briefs: Physical Sciences
Dryden Flight Research Center has developed a computer program that performs signal management for analysis in real time (SMART). This program, called "SMART," has been effectively used since 1991 in...
Briefs: Photonics/Optics
A simplified microwave radiometric apparatus has been proposed for use in quantifying the potential danger of accretion of ice onto an aircraft flying through a cloud. The quantity of...
Briefs: Physical Sciences
A report proposes the use of lightweight balloon-borne instrumentation systems for exploration in the vicinity of a lander on the surface of Mars. Each system would comprise instrumentation with a mass of about 0.2 kg and a balloon with a mass of about 0.8 kg and volume of about 50 m3. The...
Briefs: Motion Control
Technological advances have driven the evolution of aircraft flight-control systems. In the dawn of 20th-century aviation, the Wright Brothers used cables and warping of wing surfaces to change...