Spacecraft-propulsion blocks (KDU) from Isayev's design bureau (now Khimmash)
Norbert Brügge, Germany Update: reworked
1. Civilian space-transport and orbital modules
Spacecraft
KDU
Fuel
Variants
2. Lunar and IP probes (+ HEO spacecrafts)*
TG-02/AK-27I (?)
UDMH/AK-27I
?
UDMH/N2O4
3. Military Zenit spacecrafts
Orbit-engine
Standard
Civilian variants
Korabl
TDU-1 (S5.4)
-
TG-02/AK-27I
Zenit-4
Zenit-2M
4. Military Yantar spacecrafts
-engine
1981 - 1987
1974 - 1981
1979 - 1983
1981 - 2002
2004 - 2009
2006
2009