Encyclopedia Astronautica Home - Search - Browse - Alphabetic Index: 0- 1- 2- 3- 4- 5- 6- 7- 8- 9 A- B- C- D- E- F- G- H- I- J- K- L- M- N- O- P- Q- R- S- T- U- V- W- X- Y- Z J-1 F2
- Stage 1. 1 x H-2A SRB-A.
*Gross Mass*: 76,400 kg (168,400 lb).*Empty Mass*: 10,400 kg (22,900 lb).*Thrust (vac)*: 2,250.000 kN (505,820 lbf).*Isp*: 280 sec.*Burn time*: 101 sec.*Isp(sl)*: 230 sec.*Diameter*: 2.50 m (8.20 ft).*Span*: 2.50 m (8.20 ft).*Length*: 15.20 m (49.80 ft).*Propellants*:**Solid**.*No Engines*: 1.*Engine*:**SRB-A**.*Status*: In production.*Comments*: Shorter monolithic motor using filament-wound case technology from Thiokol. Version for J-1 has 1,000 kg less propellant and 1,200 kg less empty mass.
- Stage 2. 1 x J-1-2.
*Gross Mass*: 12,800 kg (28,200 lb).*Empty Mass*: 2,400 kg (5,200 lb).*Thrust (vac)*: 524.802 kN (117,980 lbf).*Isp*: 282 sec.*Burn time*: 73 sec.*Isp(sl)*: 0.0000 sec.*Diameter*: 1.40 m (4.50 ft).*Span*: 1.40 m (4.50 ft).*Length*: 2.70 m (8.80 ft).*Propellants*:**Solid**.*No Engines*: 1.*Engine*:**M-23-J**.*Other designations*: M-23.*Status*: In production.*Comments*: Version for J-1 F2 has 300 kg heavier empty mass.
- Stage 3. 1 x J-1-3.
*Gross Mass*: 3,600 kg (7,900 lb).*Empty Mass*: 300 kg (660 lb).*Thrust (vac)*: 132.085 kN (29,694 lbf).*Isp*: 294 sec.*Burn time*: 87 sec.*Isp(sl)*: 0.0000 sec.*Diameter*: 1.50 m (4.90 ft).*Span*: 1.50 m (4.90 ft).*Length*: 2.70 m (8.80 ft).*Propellants*:**Solid**.*No Engines*: 1.*Engine*:**M-3B-J**.*Other designations*: M-3B.*Status*: In production.
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