1. Propulsion Workshop 23 March, 2011 In-Space Propulsion Technology Area 02 Alfred Herzl © 2011 Lockheed Martin Corporation. All Rights Reserved.

2. 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 2

3. Propulsion Workshop 23 March, 2011 Progress RCS Tanks – where is the propellant ET – temp control, packaging hydrogen Magellan – steering a solid, staging MGS – Dual mode, aerobraking Cassini – Big delta V, suppliers Stardust – fuel remaining, low cost XSS-11 – min. I-bit, low cost MRO – Keep it simple Phoenix – Pulsed thrusters Juno – environments, spinner Orion – many mission possibilities 3

4. Propulsion Workshop 23 March, 2011 Propellant Systems 4 Photos courtesy NASA

5. Propulsion Workshop 23 March, 2011 Propulsion Systems 5 Image Credit: NASA JPL, University of Arizona Photos courtesy NASA

6. 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 6

7. 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 7