Kistler Stage 1

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Model: Kistler Stage 1. Gross Mass: 250,000 kg (550,000 lb). Empty Mass: 20,500 kg (45,100 lb). Thrust (vac): 5,049.400 kN (1,135,150 lbf). Isp: 331 sec. Burn time: 139 sec. Propellants: Lox/Kerosene. Isp(sl): 297 sec. Diameter: 6.70 m (21.90 ft). Span: 6.70 m (21.90 ft). Length: 18.40 m (60.30 ft). Country: USA. No Engines: 3. Motor: NK-33. Status: In development. Cost $ : 10.000 million.

Stage burns for 35 seconds to place itself on return-to-launch-site trajectory for recovery. Therefore to calculate performance 12,400 kg propellants for flight back to launch site should be added to empty mass. Empty mass also includes six parachutes, landing bags, and is calculated, based by apportioning total vehicle empty mass.

Used on Launch Vehicles:

Kistler K-1.

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