N.A.S.A. Space Shuttle
SSME Block-I		 Space Shuttle
SSME Block-IA		 Space Shuttle
SSME Block-IIA		 Space Shuttle
SSME Block-II
Overall
Vehicle		 Operational from 20.10.1995 12.01.1997 23.01.1998 08.04.2002
  to 20.06.1996 02.06.1998 01.03.2002 08.07.2011
Orbital flights   4 5 17 27
Payload weight t STS-78 10.675 STS-82 7.588 STS-101 14.622 STS-113 14.934
Gross liftoff weight t ~2,049

2,047.27

2,050.11

 2,050.78
Gross propellant weight t < 1,749.32 < 1,749.32 < 1,751.18 < 1,751.18
Total length m 56.14 56.14 56.14 56.14
Max. diameter (span) m 23.79 23.79 23.79 23.79
Total liftoff thrust (s.l.) kN 31,827 31,8278 31,827 31,827
Total impulse (vac) MN*s < 5,938.6 < 5,938.6 < 5,927.0 < 5,927.0

Bay

 Total length m 18.29 18.29 18.29 18.29
Diameter m 4.57 4.57 4.57 4.57
Total weight t - - - -

Orbiter

 Name   Columbia Discovery Atlantis Endeavour
  Length m 37.24 37.24 37.24 37.24
Diameter m        
Liftoff weight (excl. payload) t 105.523 ? ? 101.526
Propellant weight t  < 21.65 < 21.65 < 21.65 < 21.65
Engines 2 OMS AJ-10-190 AJ-10-190 AJ-10-190 AJ-10-190
Propellant  

MMH/N2O4

MMH/N2O4

MMH/N2O4

MMH/N2O4
Total thrust (vac) kN 53.38 53.38 53.38 53.38
Specific impulse (vac) N*s/kg 2886 2886 2886 2886
Burn time s < 1,170 < 1,170 < 1,170 < 1,170
Total impulse (vac) MN*s < 62.5 < 62.5 < 62.5 < 62.5

Stage 1

 Name   LWET LWET SLWET SLWET
  Length m 46.88 46.88 46.88 46.88
Diameter m 8.41 8.41 8.41 8.41
Liftoff weight t 754.58 754.58 753.03 753.03
Propellant weight t 724.25 724.25 726.11 726.11
Engines 3 Rock. SSME-I Rock. SSME-IA Rock. SSME-IIA Rock. SSME-II
Propellant   LH2/LOX LH2/LOX LH2/LOX LH2/LOX
Total thrust (s.l.) kN 5,004.0 5,004.0 5,004.0 5,004.0
Specific impulse (s.l.) N*s/kg 3564 3564 3541 3541
Burn time s 511 511 507.5 507.5
Total impulse (vac) MN*s 3,233.8 3,233.8 3,222.2 3,222.2

Booster

 Name   2 RSRM 2 RSRM 2 RSRM 2 RSRM
  Length m 45.46 45.46 45.46 45.46
Diameter m 3.71 3.71 3.71 3.71
Liftoff weight t 1,178.20 1,178.20 1,178.20 1,178.20
Propellant weight t 1,003.42 1,003.42 1,003.42 1,003.42
Engines   Thiokol Thiokol Thiokol Thiokol
Propellant   solid PBAN solid PBAN solid PBAN solid PBAN
Total thrust (s.l.) kN 26,823 (max) 26,823 (max) 26,823 (max) 26,823 (max)
Specific impulse (s.l.) N*s/kg 2383 2383 2383 2383
Burn time s 122.2 122.2 122.2 122.2
Total impulse (vac) MN*s 2,642.3 2,642.3 2,642.3 2,642.3