Encyclopedia Astronautica
Zyb Mod 2-1

N2O4/UDMH propellant rocket stage. Loaded mass 10,000 kg.

Status: Retired 1993.
Gross mass: 10,000 kg (22,000 lb).
Height: 8.00 m (26.20 ft).
Diameter: 1.50 m (4.90 ft).
Number: 19 .


Associated Countries
Associated Engines
Associated Launch Vehicles
  • Zyb Russian zero-G suborbital launch vehicle based on surplus R-27 SLBM. Suborbital; 17-24 min zero G. Payload volume 1.5 cu. M. Payload 650 kg to 1800 km or 1000 kg to 1000 km. More...

Associated Manufacturers and Agencies
  • Makeyev Russian manufacturer of rockets, spacecraft, and rocket engines. Makeyev Design Bureau, Kolomna, Russia. More...

Associated Propellants
  • N2O4/UDMH Nitrogen tetroxide became the storable liquid propellant of choice from the late 1950's. Unsymmetrical Dimethylhydrazine ((CH3)2NNH2) became the storable liquid fuel of choice by the mid-1950's. Development of UDMH in the Soviet Union began in 1949. It is used in virtually all storable liquid rocket engines except for some orbital manoeuvring engines in the United States, where MMH has been preferred due to a slightly higher density and performance. More...
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