J-2X Development Program
Overview
Walt Janowski
Deputy Program Manager
October 21, 2008

J-2X: Apollo-era Derivative Engine
CEV Upper Stage and CaLV EDS Engine
Crew
Lander
Earth Departure
Stage (1 J-2X)
450 klb LOx/LH2
S-IVB (1 J-2)
Upper Stage 240 klb LOx/LH2
(1 J-2X)
280 klb LOx/LH2
S-II (5 J-2)
1 Mlb LOx/LH2
Core Stage
5 (5 RS-68)
Segment 2.6 Mlb LOx/LH2 S-IC (5 F-1)
RSRM 3.9 Mlb LOx/RP
Height: 309 ft Height: 358 ft Height: 364 ft
Gross Liftoff Mass: 2.0Mlb Gross Liftoff Mass: 6.4Mlb Gross Liftoff Mass: 6.5Mlb
Crew Launch Vehicle Cargo Launch Vehicle Saturn V
1
Pratt & Whitney Rocketdyne

NASA’s Exploration Roadmap
05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
1st Human CEV Flight Lunar Outpost Buildup
7th Human
Robotic Precursors
Robotic Precursors Lunar Landing
Commercial Crew/Cargo for ISS
Commercial Crew/Cargo for ISS
Mars
Development
Space Shuttle
Space Shuttle
J-2X supports two missions
• CLV (underway now)
CEV Development
CEV Development • CaLV (starting in 2011)
Crew Launch Development
Crew Launch Development
Lunar Lander Development
Lunar Lander Development
Lunar Heavy Launch Development
Lunar Heavy Launch Development
Earth Departure Stage Development
Earth Departure Stage Development
Surface Systems Development
Surface Systems Development
2
Pratt & Whitney Rocketdyne

J-2 Engine Lineage
J-2X: Adding a new member to the family
1960-1970 1965-1971 1996-2001 2006-
Configuration J-2 J-2S X-33 J-2X
Thrust 230 klb 265 klb 261 klb 294 klb
Isp 425 sec 436 sec 419 sec 448 sec
Mass 3,492 lb 3,800 lb 7,500 lb 5,450 lb
Length 116 in 116 in 79 in 185 in
Requirements
3
Pratt & Whitney Rocketdyne

J-2 vs J-2x Size Comparison
200”
116” dia.
80” dia.
4
Pratt & Whitney Rocketdyne

J-2X & RS-68 Size Comparison
J-2X
RS-68
5
Pratt & Whitney Rocketdyne

J-2X System Development Plan
CY 2006 2007 2008 2009 2010 2011 2012 2013 2014
Ares 1-Y Orion 1 Orion 2, 3, 4…
J-2X Engine DDT&E Projected Launch Milestones
Mass Sim E10006 (NE005)
Engine Need Dates Engine for MPTA Engine for Orion 1
ATP PRR SRR/SDR PDR CDR
DCR Level 4 Milestones
CoDR PDR CDR Engine Build Completions
Level 5 Milestones
Design
Fabrication & Assembly
PPA #1A
Stand Prep SSC A-1
Stand Prep SSC A-2
Fac C/O
Stand Build SSC A-3
Integration
Stand Prep SL MPTA
Prep, Integration, & Test
Shaker Facility (boost phase sim)
6
Pratt & Whitney Rocketdyne

Powerpack I Testing Completed
7
Pratt & Whitney Rocketdyne

Component Testing
Supporting Design
Testing of 58 element injector
Workhorse GG at MSFC Subscale Main Injector Test
8
Pratt & Whitney Rocketdyne

Procurement Activity Supports
Engine Fabrication Schedule
MCC Manifold
Casting
Turbopump Hardware MCC Liner
Development Spinning
9
Pratt & Whitney Rocketdyne

Program Summary
• Program team is fully enabled and engaged
• PWR on contract for $1.2B DDT&E effort
• Rely on heritage & flight proven technology
• Experienced design, fabrication, test team
• Program progress is on plan
• Design matured through Critical Design Review
• Significant risk mitigation testing contributing to design
• Early hardware fabrication initiated
J-2X :: Low Risk Propulsion for Exploration
J-2X Low Risk Propulsion for Exploration
10
Pratt & Whitney Rocketdyne

11
Pratt & Whitney Rocketdyne