Aeronautical Vehicles Commons^™

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 …

Stanford Classes At Nasa Ames, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs titled "Stanford Classes At NASA Ames" from December 10, 2002.

Stanford Student Satellite Program, Robert J. Twiggs, Bulent Altan

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs and Bulent Altan titled "Stanford Student Satellite Program" from December 20, 2002.

Emerald Final Report For Nag5-9737, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs titled "Emerald Final Report for NAG5-9737" from November 22, 2002.

Cubesat Workshop: Frascati, Italy, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs titled "CubeSat Workshop Frascati, Italy" from October 26, 2002.

The Next Generation Of Innovative Space Engineers: University Students Are Now Getting A Taste Of Space Experience Building, Launching And Operating Their Own Space Experiments With Low-Cost Picosatellites, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

An article authored by Professor Bob Twiggs titled "The Next Generation of Innovative Space Engineers: University Students are Now Getting a Taste of  Space Experience Building, Launching and Operating their own Space Experiments with Low-Cost Picosatellites" from October 22, 2002.

The Next Generation Of Innovative Space Engineers: University Students Are Now Getting A Taste Of Space Experience Building, Launching And Operating Their Own Space Experiments With Low-Cost Picosatellites, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs titled "The Next Generation of Innovative Space Engineers: University Students are Now Getting a Taste of Space Experience Building, Launching and Operating their own Space Experiments with Low-Cost Picosatellites" and presented at the 5th International ESA Conference on Guidance Navigation & Control on October 22, 2002.

Iridium: Space Engineering - Project Based Learning By Working Real Space Programs, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs titled "Iridium: Space Engineering - Project Based Learning by Working Real Space Programs" from October 15, 2002.

Cubesat 2002 Cdr, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs titled "CubeSat 2002 CDR" from October 14, 2002.

Darpa, Robert J. Twiggs, Jordi Puig-Suari, Brian Horias

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professors Bob Twiggs, Jordi Puig-Suari, and Brian Horais titled "DARPA" from September 18, 2002.

A Cubesat Derived Design For A Unique Commericial Science Application, Matthew R. Long, Eric Tapio, Glenn Tran, Greg Rodgers, Allen Lorenz, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

An article authored by Matthew R. Long, Eric Tapio, Glenn Tran, Greg Rodgers, Allen Lorenz, and Robert Twiggs titled "A CubeSat Derived Design for a Unique Commericial Science Application" from September 5, 2002.

Spacecraft Design Program, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs titled "Spacecraft Design Program" from August 6, 2002.

Opal, Sapphire, And The Fgn, James Cutler

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by James Cutler titled "Opal, Sapphire, and the FGN" on August 6, 2002.

Responsive Access, Small Cargo, Affordable Launch: Introduction Briefing, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Preston H. Carter II titled "Responsive Access, Small Cargo, Affordable Launch: Introduction Briefing" from August 6, 2002.

Rascal: Responsive Access, Small Cargo, Affordable Launch, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs titled "RASCAL: Responsive Access, Small Cargo, Affordable Launch" from August 6, 2002.

Arliss 2002: Cansat Experiment, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint presentation created by Professor Bob Twiggs titled "ARLISS 2002 CanSat Experiment" from August 2, 2002.

Numerical Studies Of Transition For Flows Around Multi-Element Airfoils, Fengjun Liu

Dissertations

The transition of flows around a multi-element airfoil has been numerically studied using RANS with a k - e two-equation transition model, LST and DNS. The transition model uses an effective eddy-viscosity by coupling an intermittence-like correction to a turbulence eddy-viscosity that can be obtained via solving a parent k - e turbulence model. The transition model is truly predictive in that it is able to predict transition onset locations without having to specify prior knowledge of the targeted transition process. The predicted transition onset locations for all the cases studied were compared with the measured data. The results suggest …

Nanosat One Critical Design Review: Final Review - Part 3, Robert J. Twiggs, Jonathan How, Christopher Kitts

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Jonathan How, Christopher Kitts, and Bob Twiggs titled "Nanosat One Critical Design Review: Final Review - Part 3" from July 23, 2002.

Subsystems & Components Review: Final Review - Part 2, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs titled "Subsystems & Components Review: Final Review - Part 2" from July 23, 2002.

Real Spacey Programs: Project Based Learning, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs titled "Real Spacey Programs: Project Based Learning" from July 11, 2002.

Stanford Space Systems Program: Using Cubesats, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs titled "Stanford Space Systems Program: Using CubeSats" from July 2, 2002.

Nanosat One Critical Design Review: Final Report - Part 1, Robert J. Twiggs, Jonathan How, Christopher Kitts

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Jonathan How, Christopher Kitts, and Bob Twiggs titled "Nanosat One Critical Design Review: Final Report" from June 24 , 2002.

Colorado Nasa Space Grant Workshop (Part 2), Robert J. Twiggs, Brian Foster

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs and Brian Foster titled "Colorado NASA Space Grant Workshop" from June 20, 2002.