GS Paper- 3 (Space Technology)

The Indian Space Research Organisation (Isro) said it successfully completed a 25-seconds qualification test of the high thrust Vikas engine for the Gaganyaan programme at the Isro Propulsion Complex (IPRC) at Mahendragiri in Tamil Nadu.


  1. With regard to the Vikas engine qualification for the Gaganyaan programme, two engines have already undergone tests under nominal operating conditions for a total duration of 480 seconds.
  2. The test carried out today is to verify the robustness of the engine by operating beyond its nominal operating conditions (fuel-oxidiser ratio and chamber pressure).
  3. VIKAS (an acronym for Vikram Ambalal Sarabhai) is a family of liquid-fuelled rocket engines conceptualized and designed by the Liquid Propulsion Systems Centre since the 1970s.
  4. The early production VIKAS engines used imported French components which were later replaced by domestically produced equivalents.
  5. It is used in the Polar Satellite Launch Vehicle (PSLV) and the Geosynchronous Satellite Launch Vehicle (GSLV) series of expendable launch vehicles for space launch use.
  6. VIKAS engines are used to power the second stage PSLV, boosters and second stage of GSLV Mark I and II and now the first stage of GSLV Mark III (LVM3).


  1. This is another milestone in the human-rating of systems and the launch vehicle for the human space programme.
  2. Just last week, the space agency had conducted a 720-seconds qualification test of the cryogenic engineCE-20 — to be used for Gaganyaan.