J1 F2
Japanese allsolid orbital launch vehicle. Lower cost alternate to the original J1 design. Uses the SRBA of the H2A vehicle as the first stage, the second and third stages of the J1, with updated avionics.
LEO Payload: 850 kg (1,870 lb) to a 250 km orbit at 30.00 degrees. Payload: 600 kg (1,320 lb) to a 407 km 51.6 deg orbit.
Stage Data  J1 F2
 Stage 1. 1 x H2A SRBA. 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: SRBA. Status: In production. Comments: Shorter monolithic motor using filamentwound case technology from Thiokol. Version for J1 has 1,000 kg less propellant and 1,200 kg less empty mass.
 Stage 2. 1 x J12. 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: M23J. Other designations: M23. Status: In production. Comments: Version for J1 F2 has 300 kg heavier empty mass.
 Stage 3. 1 x J13. 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: M3BJ. Other designations: M3B. Status: In production.
Status: In development.
Gross mass: 91,500 kg (201,700 lb).
Payload: 850 kg (1,870 lb).
Height: 26.20 m (85.90 ft).
Diameter: 2.50 m (8.20 ft).
Thrust: 1,800.00 kN (404,600 lbf).
Apogee: 250 km (150 mi).
More...  Chronology...
Associated Countries
See also

J Allsolid rocket motor launch vehicle. Because of the high cost, the original J1 design was superseded by an alternate J1 F2 with a different booster stage. More...
Associated Manufacturers and Agencies

Nissan Japanese manufacturer of rocket engines and rockets. Nissan, Japan. More...
Associated Stages

H2A SRBA Solid propellant rocket stage. Loaded/empty mass 76,400/10,400 kg. Thrust 2,250.00 kN. Vacuum specific impulse 280 seconds. More...

J12 Solid propellant rocket stage. Loaded/empty mass 12,800/2,400 kg. Thrust 524.80 kN. Vacuum specific impulse 282 seconds. Version for J1 F2 has 300 kg heavier empty mass. More...

M3B Solid propellant rocket stage. Loaded/empty mass 3,590/310 kg. Thrust 132.12 kN. Vacuum specific impulse 294 seconds. More...
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