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AEROSPACE    ATLAS V
1. HUMAN-RATED EELV
1st MAR 2005 2nd DEC 2008 (3rd MAY 2009)←HUMAN-RATE RS-68 + RL 10 PERFORMANCE? ABORT? COST

NO ATLAS V #:
CDR ONLY (DELTA IV H FLOWN)
RD 180 (RUSSIAN) [INITIAL REQUIREMENTS]
NOTE=change in HR req w/ 2b2 [[?]] from 2-fault tolerance & 1-fault w/ abort
USED=
1ST STAGE existing DL IV H RS68B ←already planned for ares V
2ND STAGE: version of atta 2nd stage
RL10
NEED TO PULL RS68B forward
(originally intended for ares V) [4 reduce pres H]
RL10 issuse: DELTA IV H [[?]] plastically deforms @ most thrust
STAGE 2 OPTIONS (CONFIGS) LOOKED AT OPTIONS / HR DELTA IV H 2nd STAGE
4 engine IV H stage 2
ares I stage 2
HR J-2X stage 2
no stage 2
USED ~6+ CONFIGS TO ASSES
•ALL CONFIGS MEET ABORT REQ.
•ALL BUT #6 HAVE PERF→ISS (>ares 1)
(#6 = reduced thrust + 16.8K#
•CONFIGS 4→BEST BLEND, SO USED IN REST OF STUDY
•LAUNCH OPS + PROCESSING OPTIONS
NEW PAD @SLC 37 
USE SLC 37A (W/AF)
USE 39B
MORE CONSERVATIVE W/ NEW ARCH. REQ ID