Indian Space Research Organisation GSLV Mk.1 GSLV Mk.1+ GSLV Mk.1+ (F06)

Overall
Vehicle

Operational from 18.04.2001 20.09.2004 25.12.2010
  to 08.05.2003 02.09.2007  
Orbital flights   2 3 1
Payload weight t GTO  1.82 GTO 1.95 GTO 2.31
Gross liftoff weight t 396.60 409.20 412.80
Gross propellant weight t 337.36 349.78 352.49
Total length m 49.13 49.13 49.99
Max. diameter (span) m 7.50 7.50 7.50
Total liftoff thrust (s.l.) kN 6,596 7,097 7,097
Total impulse (vac) MN*s 937.2 988.1 1,000.2

Fairing

Total length m 7.80 7.80 8.66
Diameter m 3.40 3.40 4.00
Total weight t 1.25 1.25 ~1.80
Stage 3 Name   GS-3 (C-12.5) GS-3 (C-12.5) GS-3 (C-15)
  Length m 8.72 (9.09) 8.72 (9.09) 8.72 (9.09)
Diameter m 2.80 2.80 2.80
Liftoff weight t 14.60 14.60 17.30
Propellant weight t 12.49 12.49 15.20
Engines   KVD-1 KVD-1 KVD-1
Propellant   LH2/LOX LH2/LOX LH2/LOX
Total thrust (vac) kN 73.6 73.6 73.6
Specific impulse (vac) N*s/kg 4427 4452 4452
Burn time s 754 755 920
Total impulse (vac) MN*s 55.3 55.6 67.7
Stage 2

Name

  GS-2 (L-37.5) GS-2 (L-39.5) GS-2 (L-39.5)
  Length + interstage m 12.30 (11.80) 12.30 (11.80) 12.30 (11.80)
Diameter m 2.80 2.80 2.80
Liftoff weight t 42.90 45.05 45.05
Propellant weight t 37.47 39.65 39.65
Engines  

Vikas 4

Vikas 4B

Vikas 4B

Propellant  

UDMH/N2O4

UH25/N2O4

UH25/N2O4

Total thrust (vac) kN 725.0 804.5 804.5
Specific impulse (vac) N*s/kg 2903 2962 2962
Burn time s 150 146 146
Total impulse (vac) MN*s 108.8 117.4 117.4

Stage 1

Name   GS-1 (S-128) GS-1 (S-138) GS-1 (S-138)
  Length m 20.30 20.30 20.30
Diameter m 2.80 2.80 2.80
Liftoff weight t 156.20 166.50 166.50
Propellant weight t 128.00 138.24 138.24
Engines        
Propellant   solid HTPB solid HTPB solid HTPB
Total thrust (s.l.) kN 4,193.6 (max) 4,386.2 (max) 4,386.2 (max)
Specific impulse (s.l.) N*s/kg 2324 2357 2357
Burn time s 100 108 108
Total impulse (vac) MN*s 333.9 364.7 364.7

Booster

Name   4 GS-0 (L-40) 4 GS-0 (L-40) 4 GS-0 (L-40)
  Length m 19.70 19.70 19.70
Diameter m 2.10 2.10 2.10
Liftoff weight t 179.80 179.80 179.80
Propellant weight t 159.40 159.40 159.40
Engines  

Vikas 2

Vikas 2B

Vikas 2B

Propellant  

UDMH/N2O4

UH25/N2O4

UH25/N2O4

Total thrust (s.l.) kN 2,402.0 2,710.8 2,710.8
Specific impulse (s.l.) N*s/kg 2432 2501 2501
Burn time s 161 147 147
Total impulse (vac) MN*s 439.2 450.4 450.4