Propulsion Workshop

23 March, 2011

In-Space PropulsionTechnology Area 02

Alfred Herzl

© 2011 Lockheed Martin Corporation. All Rights Reserved.

Propulsion Workshop

23 March, 2011

Requirements:

• Delta V Performance– Isp, volumes, steering, arc-following

• ACS Performance– Prop. control, coupled thrusters, min. I-bit, slew, GN&C I/F

• Packaging– LV I/F, primary structure attachment, staging, servicing, wet/dry mass– Switch circuits, power, telemetry, control, fault protection

• Environments– G, vibr., shock, temp.– ESD, magnetics

• Reliability– Life, cycles, redundancy

• Non-propellant propulsion• Schedule• Cost

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Propulsion Workshop

23 March, 2011

Progress

RCS Tanks – where is the propellantET – temp control, packaging hydrogenMagellan – steering a solid, stagingMGS – Dual mode, aerobrakingCassini – Big delta V, suppliersStardust – fuel remaining, low costXSS-11 – min. I-bit, low costMRO – Keep it simplePhoenix – Pulsed thrustersJuno – environments, spinnerOrion – many mission possibilities

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Propulsion Workshop

23 March, 2011

Propellant Systems

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Photos courtesy NASA

Propulsion Workshop

23 March, 2011

Propulsion Systems

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Image Credit: NASA JPL, University of Arizona

Photos courtesy NASA

Propulsion Workshop

23 March, 2011

Next Mission Needs

• High pressure, low mass systems• High autonomy with integrated health management• Component vendor capabilities

– Propellant/pressurant control• Long-life cryogenics• Fuels• Refueling• SEP• Tools

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Propulsion Workshop

23 March, 2011

Summary

1. Missions must be identified to “pull” more mature technologies

2. Seek out adjacent commercial markets

3. Every mission has the responsibility to further technology developments

4. Test Programs are the key to confidence

5. NASA, Academia, and Industry ALL want to work on technology development

6. Prove technologies (qualify) by Mission PDR

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