WorldCat Identities

Hubbard, Scott 1948-

Overview
Works: 13 works in 28 publications in 1 language and 1,284 library holdings
Genres: History  Conference papers and proceedings  Drama 
Roles: Author, Thesis advisor, Translator
Classifications: QB643, 523.430723
Publication Timeline
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Most widely held works by Scott Hubbard
Exploring Mars : chronicles from a decade of discovery by Scott Hubbard( Book )

15 editions published between 1900 and 2012 in English and Undetermined and held by 1,076 WorldCat member libraries worldwide

Now for the first time Scott Hubbard tells the complete story of how he fashioned this program, describing both the technical and political forces involved and bringing to life the national and international cast of characters engaged in this monumental endeavor. Blending the exciting stories of the missions with the thrills of scientific discovery, Exploring Mars will intrigue anyone interested in the science, the engineering, or the policy of investigating other worlds
Variable temperature performance of a Si(Li) detector stack( Book )

1 edition published in 1994 in English and held by 92 WorldCat member libraries worldwide

Multi-line gamma-ray spectrometer performance of a Si(Li) detector stack( Book )

1 edition published in 1995 in English and held by 91 WorldCat member libraries worldwide

Concepts and approaches for Mars exploration( Book )

1 edition published in 2000 in English and held by 15 WorldCat member libraries worldwide

A longitudinal study of the theory of parallel growth by Scott Hubbard( Book )

2 editions published in 2008 in English and held by 2 WorldCat member libraries worldwide

Chapel 1984--April 7 : Spring Revival 1984 by Scott Hubbard( Recording )

1 edition published in 1984 in English and held by 1 WorldCat member library worldwide

An investigation of liquefying hybrid rocket fuels with applications to solar system exploration by Ashley Anne Chandler( )

1 edition published in 2012 in English and held by 1 WorldCat member library worldwide

Developments in hybrid propulsion technology over the past several decades have made these motors attractive candidates for a variety of applications. In the past, they have been overlooked due to the low regression rate of classical hybrid fuels or in favor of the heritage and commercial availability of liquid or solid propulsion systems. The slow burning rate translates into either a reduced thrust level or the requirement for a complicated, multi-port fuel grain to increase the available burning surface area. These major disadvantages can be mitigated through the use of liquefying hybrid fuels, such as paraffin. Typically, this increase is enough to achieve desired thrust levels with a simple, single port design. Benefits unique to the paraffin-based hybrid design makes it a competitive and viable option for solar system exploration missions. Two specific examples are included to illustrate the advantages of hybrids for solar system exploration. A hybrid design for a Mars Ascent Vehicle as part of a sample return campaign takes advantage of paraffin's tolerance to low and variable temperatures. Hybrid propulsion systems are well suited for planetary orbit insertion because of their ability to throttle, stop and restart at high thrust levels. The high regression rates of liquefying hybrid fuels are due to a fuel entrainment mass transfer mechanism. The design, assembly and results of an experiment to visualize this mechanism are presented. A combustion chamber with three windows allows visual access to the combustion process. A flow conditioning system is employed to create a uniform oxidizer flow at the entrance to the combustion chamber. Experimental visualization of entrainment mass transfer will enable the improvement of combustion models and therefore future hybrid designs
Thermal modeling of coring and drilling operations for solar system exploration applications by Timothy Justin Szwarc( )

1 edition published in 2013 in English and held by 1 WorldCat member library worldwide

Heat created at a drilling site by the motion of a rotary-percussive coring system is a highly problematic, yet unavoidable consequence of geologic sample acquisition. This heat is particularly hazardous in the dry drilling techniques to be used for Mars sample return (MSR) and missions to the Solar System's moons, since heat has the capability of altering material composition or evolving compounds of interest, including water. In addition, sublimation of any ice contained in the rock or soil formation could cause vapor deposition onto cooler areas of the bit, permanently freezing the bit in the borehole and potentially leading to mission failure. A thermal model capable of predicting temperature profiles throughout the geologic formation and bit is an essential tool in creating drilling schedules that minimize both damage to samples and risk to system hardware. This investigation uses a series of drilling and coring tests, performed with a prototype MSR sampling system, to gather thermal data on a suite of solar system analog materials across a variety of atmospheric and starting thermal conditions. The materials and conditions were chosen to emulate rock types and conditions found on Mars and potentially on Jupiter's Moon Europa. The data is used to verify the accuracy of a finite element model specifically designed for this application. The model may be used to prevent rock or cuttings temperatures from reaching threshold values by predicting necessary pauses and/or power reductions. The average error of the model in predicting temperature profiles is 6.83%, with the errors of only two of eighteen tests exceeding 10%. A number of important relationships are found using the thermal profiles provided by the model. A linear relation between unconfined compressive strength (UCS) and maximum core temperature is developed, with decreased rock starting temperature leading to an increase in rock core temperature change. Maximum core temperature is dependent on system specific energy, defined as the ratio of energy consumption to rock volume excavated by the bit; rock parameters; operational parameters; and bit geometry by a simple power law. Energy transmission efficiency into the rock by a percussive bit is found to increase linearly with UCS and is also dependent on rock ambient pressure due to the subsequent changes in friction. Cuttings temperatures are identified by the model, which aids in the construction of sample acquisition schedules
The solar system exploration strategic roadmap by United States( Book )

1 edition published in 2005 in English and held by 1 WorldCat member library worldwide

Antigone by Sophocles( Book )

1 edition published in 2011 in English and held by 1 WorldCat member library worldwide

Presents a modern interpretation of Sophocles' Antigone and includes explanatory notes on the text and mythological content
CAIB agency wide action matrix : [draft]( Book )

1 edition published in 2003 in English and held by 1 WorldCat member library worldwide

Report of the Planetary Flight Instrument Cost Workshop : NASA Ames Research Center, July 7-9, 1992 by Planetary Flight Instrument Cost Workshop( Book )

1 edition published in 1992 in English and held by 1 WorldCat member library worldwide

Hybrid rocket combustion and applications to space exploration missions by Elizabeth T Jens( )

1 edition published in 2015 in English and held by 1 WorldCat member library worldwide

A major focus of the NASA Technology Roadmaps (2015) is the development of new propulsion systems for in-space and launch applications. Hybrid propulsion systems, which have fuel and oxidizer stored in different phases, present a favorable alternative to conventional propulsion systems for many exploration missions. Hybrid propulsion systems enjoy a high specific impulse, are throttle-able, able to be stopped and restarted, and benefit from flexibility in their packaging configuration. However, the adoption of hybrid rocket systems has historically been inhibited by performance issues stemming from the use of slow-burning fuels. Many of these performance issues can be resolved through the use of paraffin-based fuels. The overarching goal of this thesis work is to improve the understanding of paraffin-based hybrid rockets in order to facilitate their adoption as a viable in-space propulsion system over existing liquid and solid chemical propulsion systems. This goal has been divided into two focus areas. 1. Investigate the feasibility of using hybrid rocket motors for exploration missions in order to determine the class of mission(s) for which they are best suited. A general approach for first pass hybrid propulsion system design is presented. This approach is applied to two missions, a very small-scale Mars aerocapture demonstration mission and a Flagship class Europa flyby mission. A propulsion system using a hybrid rocket motor is found to be viable for both classes of mission with potential benefits over the baseline propulsion systems in terms of total mass, power, and cost. 2. Improve the understanding of the combustion processes inside classical and fast-burning hybrid rocket motors. This task is conducted in order to facilitate improved performance models of these systems and to better inform designers as they evaluate these systems for specific missions. The approach to this work utilizes a combustion visualization experiment and various optics to explore the mass transfer phenomena, boundary layer growth rates and the flame location above combusting fuels at conditions representative of those in a typical hybrid rocket motor. This thesis provides strong confirmation of the basic droplet formation and entrainment mechanism for fast burning fuels at operating conditions representative of those within a typical hybrid rocket motor. Imaging diagnostics are successfully used to quantify the location of the flame within the boundary layer for classical and high regression rate fuels at a range of operating conditions
 
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Audience Level
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Audience Level
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Audience level: 0.30 (from 0.15 for Chapel 198 ... to 0.80 for Hybrid roc ...)

Alternative Names
G. Scott Hubbard Aeronautics and astronautics researcher

Hubbard, G., 1948-

Hubbard, G. Scott 1948-

Hubbard, Gregory Scott, 1948-

Languages
English (27)