Aeronautical Vehicles Commons^™

Space Adventures By Stanford Students & Mentors, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs titled "Space Adventures by Stanford Students & Mentors" from December 10, 2003.

A History Of Space Security, Ibpp Editor

International Bulletin of Political Psychology

This article provides a conceptual infrastructure for thinking about the history of space security.

Atmospheric Water Vapor Lidar Measurements Using Analog And Photon Counting Techniques, Anuj Maheshkumar Shah

Electrical & Computer Engineering Theses & Dissertations

Atmospheric water vapor measurements are essential for the understanding of Earth's weather and radiation budget, along with the water cycle. The remote sensing Differential Absorption Lidar (DIAL) technique is a commanding method used for water vapor measurements from aircraft, spaceborne, and ground-based platforms. The new unmanned aerial vehicle (UAV) water vapor DIAL system provides great feasibility due to the weight and size limitations. The system has significantly less weight, power consumption, and noise presence, thus making it great for UAV applications.

This thesis discusses a UAV water vapor DIAL system that was designed, developed, and evaluated. The research effort was …

A Numerical Analysis Of A Non-Porous, Flexible Upper Airfoil Surface, Asao Omura

Mechanical & Aerospace Engineering Theses & Dissertations

The aerodynamic behavior of the early Wright brothers' airfoils is an important element of the history of aeronautics. Their fabric-covered wings were not constrained to maintain the airfoil shape of their wooden rib substructures and therefore differences in performance between rigid and flexible Wright airfoil shapes can be expected. The purpose of this thesis was to develop a systematic numerical approach that allows an assessment of the influence of the fabric on the overall aerodynamic behavior of the Wright Model B airfoil. The Model B airfoil was chosen because it is the earliest "production" airfoil and has sufficient documentation to …

Nasa - Jpl: Space Adventures By Stanford Students & Mentors, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs titled "NASA - JPL: Space Adventures by Stanford Students & Mentors" from June 25, 2003.

The Multi-Application Survivable Tether (Mast) Experiment, Robert J. Twiggs, Robert Hoyt, Jeffrey Slostad

Robert "Bob" Twiggs STEM Education Collection

An article by Bob Twiigs, Robert Hoyt, and Jeffrey Slostad titled "The Multi-Application Survivable Tether (MAST) Experiment" from June 16, 2003.

Crawl, Walk, Run & Fly: Some Experiments To Try, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs titled "Crawl, Walk, Run & Fly: Some Experiments to Try" from June 13, 2003.

Cricketsat Project, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs titled "CricketSat Project" from June 4, 2003.

Design, Modeling And Evaluation Of A 2.4ghz Fhss Communications System For Narcissat, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

An article by Bob Twiigs titled "Design, modeling and evaluation of a 2.4GHz FHSS Communications System for NarcisSat" from June 2, 2003.

Space Radiation Effects In Electronic Components, Len Adams

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint presentation delivered by Professor Len Adams in May of 2003 on "Space Radiation Effects in Electronic Components."

Dnepr Space Launch System, Robert J. Twiggs, Isc Kosmotras

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by ISC Kosmotras and Professor Bob Twiggs titled "DNEPR Space Launch System" from May of 2003.

Narcissat: A 1kg Picosatellite, Kyle Doerksen, Michael Colonno

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Kyle Doerksen and Michael Colonno titled "NarcisSat: A 1kg Picosatellite" from April 29, 2003.

Spacecraft Design & Operations & Other Things, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs titled "Spacecraft Design & Operations & Other Things" from April 4, 2003.

Cansat 2003, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs titled "CanSat 2003" from March 25, 2003.

Quakesat: Earth Detection Nano-Satellite, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs titled "QuakeSat: Earth Detection Nano-Satellite" from March 21, 2003.

Microstructural Study Of Nanoprecipitates In Rra Treated Al-7075 T6 Using Afm/Ufm/Stem, Samuel J.M. Kuhr, Margaret Pinnell, Daniel Eylon

Mechanical and Aerospace Engineering Faculty Publications

7075 T651 aluminum alloy is frequently used in aircraft applications for its high strength to weight ratio. However, aircraft parts made of this alloy have been plagued by stress corrosion cracking (SCC). Retrogression and re-aging (RRA) is a post T651 two-stage heat treatment that provides improved SCC resistance with minimal loss in tensile strength. In this study, various forms of microscopy and mechanical testing are used to investigate how the RRA process affects the microstructure.

The microscopic observations in this paper show that the precipitates in the aluminum alloy coarsen and that the grain boundary regions are depleted of copper …

Cubesat 2002: Current Design Overview, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs titled "Cubesat 2002: Current Design Overview" from February 5, 2003.

Aspects Of Control For A Parafoil And Payload System, Nathan Slegers, Mark Costello

Faculty Publications - Biomedical, Mechanical, and Civil Engineering

A parafoil controlled by parafoil brake deflection offers a lightweight and space-efficient control mechanism for autonomous placement of air-dropped payloads to specified ground coordinates. The work reported here investigates control issues for a parafoil and payload system with left and right parafoil brakes used as the control mechanism. It is shown that parafoil and payload systems can exhibit two basic modes of lateral control, namely,roll and skid steering. These two modes of lateral steering generate lateral response in opposite directions. For example, a roll steer configuration turns left when the right parafoil brake is activated, whereas a skid steer configuration …