Boeing Company

 Delta 6920 Delta 6925 Delta 7920 Delta 7925 Delta 7925-H

Overall
Vehicle

 Operational from 14.02.1990 14.02.1989 04.11.1995 26.11.1990 08.07.2003

 

 to 07.06.1992 24.07.1992 18.11.2017 17.08.2009 27.09.2007
Orbital flights   3 14 29 69 3
Payload weight t MEO 3.98 GTO 1.447 SSO 3.182 GTO 1.832 GTO 2.180
Gross liftoff weight t 217.90 217.70 230.10 230.85 285.80
Gross propellant weight t 192.79 194.73 207.74 209.75 255.61
Total length m 38.81 39.38 39.38 39.38 39.79
Max. diameter (span) m 4.60 4.60 4.60 4.60 5.00
Total liftoff thrust (s.l.) kN 3,708 3,708 4,950 4,950 5,680
Total impulse (vac) MN*s 540.6 546.4 589.6 595.4 723.0

Fairing

 Total length m 7.92/8.49 7.92/8.49 7.92/8.49/8.90 7.92/8.49/8.90 8.49/8.90
Diameter m 2.44/3.05 2.44/2.89 2.44/3.05 2.44/2.89/3.05 2.89/3.05
Total weight t 0.58 0.74 0.90 0.841 1.040
Stage 3

Name

     Star 48B   Star 48B Star 48B
  Length m   2.03   2.03 2.03
Diameter m 2.44 (1.24) 2.44 (1.24) 2.44 (1.24)
Liftoff weight t 2.141 2.141 2.141
Propellant weight t 2.010 2.010 2.010
Engines   TE-M-711-18 TE-M-711-18 TE-M-711-18
Propellant   solid TP-H-3340 solid TP-H-3340 solid TP-H-3340
Total thrust (vac) kN 68.64 68.64 68.64
Specific impulse (vac) N*s/kg 2885 2885 2885
Burn time s 84.5 84.5 84.5
Total impulse (vac) MN*s 5.80 5.80 5.80
Stage 2

Name

            
  Length m 5.18 (5.97) 5.18 (5.97) 5.18 (5.97) 5.18 (5.97) 5.18 (5.97)
Diameter m 2.44 (1.75) 2.44 (1.75) 2.44 (1.75) 2.44 (1.75) 2.44 (1.75)
Liftoff weight t 6.954 6.954 6.954 6.954 6.954
Propellant weight t 6.004 6.004 6.004 6.004 6.004
Engines   AJ-10-118K AJ-10-118K AJ-10-118K AJ-10-118K AJ-10-118K
Propellant  

Aerozin50/N2O4

Aerozin50/N2O4

Aerozin50/N2O4

Aerozin50/N2O4

Aerozin50/N2O4
Total thrust (vac) kN 43.4 43.4 43.4 43.4 43.4
Specific impulse (vac) N*s/kg 3143 3143 3143 3143 3143
Burn time s 435 435 435 435 435
Total impulse (vac) MN*s 18.87 18.87 18.87 18.87 18.87

Stage 1

 Name   EELTAT EELTAT EELTAT EELTAT EELTAT
  Length m 25.71 25.71 25.71 25.71 25.71
Diameter m 2.44 2.44 2.44 2.44 2.44
Liftoff weight (+interst.) t 101.342 101.342 101.342 101.342 101.342
Propellant weight t 95.808 95.808 95.808 95.808 95.808
Engines   Rock. RS-27 Rock. RS-27 Rock. RS-27A Rock. RS-27A Rock. RS-27A
Propellant   Kerosene/LOX Kerosene/LOX Kerosene/LOX Kerosene/LOX Kerosene/LOX
Total thrust (s.l.) kN 843.0 (+8.9) 843.0 (+8.9) 914.8 (+8.9) 914.8 (+8.9) 914.8 (+8.9)
Specific impulse (s.l.) N*s/kg 2493 2493 2493 2493 2493
Burn time s 279.7 279.7 257.9 257.9 257.9
Total impulse (vac) MN*s 282.8 282.8 282.9 282.9 282.9

Booster

 Name   6+3 Castor IVA 6+3 Castor IVA 6+3 GEM-40 6+3 GEM-40

6+3  GEM-46
  Length m 10.63 (9.23) 10.63 (9.23) 12.95 (11.05/11.41) 12.95 (11.05/11.41) 14.66 (12.58/12.89)
Diameter m 1.02 1.02 1.02 1.02 1.17
Liftoff weight t 105.066 105.066 117.738 117.738 172.158
Propellant weight t 90.981 90.981 105.927 105.927 151.785
Engines   TX-780 TX-780  ATK  ATK ATK
Propellant   solid HTPB solid HTPB solid HTPB solid HTPB

solid HTPB
Total thrust (s.l.) kN 2,856 + 1,428 (max) 2,856 + 1,428 (max) 3,660 + 1789.5 (max) 3,660 + 1,789.5 (max) 4,752 + 2,458.5 (max)
Specific impulse (s.l.) N*s/kg 2332 2332 2406 / 2621 2406 / 2481 2462 / 2561
Burn time s 55.2 55.2 63.3 63.3 75.9
Total impulse (vac) MN*s 238.9 238.9 287.8 287.8 422.4