Encyclopedia Astronautica
Liberty



liberty1.jpg
Liberty 1
American low cost orbital launch vehicle. Private commercial launch vehicle.

in: 1985 dollars. Flyaway Unit Cost $: 2.000 million.

Stage Data - Liberty

  • Stage 1. 1 x Liberty 1. Gross Mass: 17,000 kg (37,000 lb). Empty Mass: 2,240 kg (4,930 lb). Thrust (vac): 245.000 kN (55,078 lbf). Isp: 270 sec. Burn time: 157 sec. Isp(sl): 230 sec. Diameter: 1.58 m (5.18 ft). Span: 1.58 m (5.18 ft). Length: 10.20 m (33.40 ft). Propellants: Lox/Kerosene. No Engines: 1. Engine: Liberty-1. Status: Development 1988.
  • Stage 2. 1 x Liberty 2. Gross Mass: 2,180 kg (4,800 lb). Empty Mass: 180 kg (390 lb). Thrust (vac): 17.789 kN (3,999 lbf). Isp: 300 sec. Burn time: 326 sec. Isp(sl): 200 sec. Diameter: 1.43 m (4.69 ft). Span: 1.43 m (4.69 ft). Length: 4.02 m (13.18 ft). Propellants: N2O4/MMH. No Engines: 1. Engine: Liberty-2. Status: Development 1988.

Status: Cancelled 1988.
Gross mass: 19,180 kg (42,280 lb).
Height: 17.00 m (55.00 ft).
Diameter: 1.58 m (5.18 ft).
Thrust: 209.00 kN (46,985 lbf).

More... - Chronology...


Associated Countries
Associated Engines
  • Liberty-1 Notional Lox/Kerosene rocket engine. 245.2 kN. Development ended 1988. Pressure-fed engine. Isp=270s. Used on Liberty launch vehicle. More...
  • Liberty-2 Notional N2O4/MMH rocket engine. 17.8 kN. Development ended 1988. Pressure-fed engine. Isp=300s. Used on Liberty launch vehicle. More...

See also
  • LCLV Various independently-funded launch vehicles have been advocated, designed, and even developed over the years. A lot of these are attempts to build low-cost launch vehicles using simpler technology. Often such projects begin based on a low cost liquid fuel technology but end up just trying to sell various combinations of Castor solid fuel stages. These enterprises often discover there's more to coming up with a reliable launch vehicle than slashing together a bunch of 'off the shelf' rocket motors and lighting the fuse.... On the other hand, if there is ever a breakthrough in less expensive access to space, it will come through one of these entrepreneurial schemes... More...

Bibliography
  • Interplanetary Spacecraft,

Associated Stages
  • Liberty 1 Lox/Kerosene propellant rocket stage. Loaded/empty mass 17,000/2,240 kg. Thrust 245.00 kN. Vacuum specific impulse 270 seconds. More...
  • Liberty 2 N2O4/MMH propellant rocket stage. Loaded/empty mass 2,180/180 kg. Thrust 17.79 kN. Vacuum specific impulse 300 seconds. More...

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