Hydrogen Peroxide vs. Hydrazine
Attitude Control Thrusters
Brittany Waletzko
Translunar/OTV Phase
Week 5
AAE450 Spring 2009
Brittany Waletzko - ATT
The Scenario
Need thrusters to despin/desaturate
reaction wheels during TLI
Thrusters could be useful for attitude
control during lunar descent as well
(~20Nm needed)
Propulsion considering using H2O2 as
oxidizer use some for ATT
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AAE450 Spring 2009
Brittany Waletzko - ATT
Bottom-Line Figures
Valves make both hydrazine and hydrogen peroxide throttleable
Hydrazine less massive but significantly more expensive
Bottom line: Depending on final main engine selection, OTV phase ATT can
accommodate with minimal project impact (level 3 changes)
Future Work: Solidifying supporting hardware mass/power/cost figures, electrothermal
hydrazine thruster options, other design alternatives
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AAE450 Spring 2009
Brittany Waletzko ATT
Questions?
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AAE450 Spring 2009
Brittany Waletzko - ATT
Backup Slides:
Preliminary Electrothermal Hydrazine Thruster Research
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AAE450 Spring 2009
Brittany Waletzko ATT
Size and Mass Comparison:
N2H4 and H2O2
<5>
AAE450 Spring 2009
Brittany Waletzko ATT
Primary References
Monopropellant Hydrazine Thrusters. Astrium Space Propulsion. 21 Jan 2009.
<http://cs.astrium.eads.net/sp/SpacecraftPropulsion/MonopropellantThrusters.html>
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Rocket Research Corporation. "Final Report for Monopropellant Hydrazine
Thruster System," 1965.
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19670030394_1967030394.pdf
Eric Wernimont, Ph.D. General Kinetics, Inc.: Huntington Beach, CA. Email
Correspondence 7 Feb - 10 Feb 2009.
Astronautix. “Hydrazine” <http://www.astronautix.com/props/hydazine.htm>
<http://www.marotta.com/DataSheets/MV100series.htm>
<http://www.circlesealcontrols.com/products/atkomatic_valves/pdf/cscatkoc_20
07-10_lo.pdf>
“Electrothermal Hydrazine Data”
<http://www.lr.tudelft.nl/live/pagina.jsp?id=6cf1d7c6-dd9a-432b-b40e02f4f8ed0d0d&lang=en>
AAE450 Spring 2009
Brittany Waletzko - ATT