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Model: Tu-121. Gross Mass: 23,200 kg (51,100 lb). Empty Mass: 7,200 kg (15,800 lb). Thrust (vac): 98.000 kN (22,031 lbf). Propellants: Air/Kerosene. Propellant Formulation: TS or T-1. Diameter: 1.70 m (5.50 ft). Span: 8.40 m (27.50 ft). Length: 27.70 m (90.80 ft). Country: USSR. No Engines: 1. Status: Development 1960.

KR-15-300 engine by OKB-300 (now MZ Soyuz), rated for 15 hour endurance.

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