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Mahesh

12/08/22 07:20 AM IST

Gaganyaan project completes Low Altitude Escape Motor Static Test

In News 
  • Another important milestone in the Gaganyaan project is completed, by successfully test-firing the Low Altitude Escape Motor (LEM) of Crew Escape System, from Sriharikota.
Crew Escape System 
  • The Crew Escape System (CES) takes away the Crew module of the Gaganyaan mission in case of any eventuality and rescues the astronauts. In case of mission-abort during the initial phase of flight, LEM provides the required thrust to CES, to take away Crew Module from the launch vehicle.
  • The LEM is a distinctive special purpose solid rocket motor with four reverse flow nozzles and generates a maximum sea level thrust of 842 kN (nominal) with a burn time of 5.98 seconds (nominal).
LEM 
  • LEM is a distinctive special purpose solid rocket motor with four reverse flow nozzles and generates maximum sea level thrust of 842 kN (nominal) with burn time of 5.98 s (nominal).
  • The nozzle end of LEM is mounted at the fore end of the launch vehicle unlike at aft end in conventional rocket motors to avoid exhaust plume impingement on crew module.
  • This necessitates the use of a reverse flow multiple nozzle in this solid rocket motor.
  • The reverse flow nozzle implies the reversal of the exhaust gas flow direction in the nozzle region. 
Gaganyaan Mission 
  • Gaganyaan is a mission by the Indian Space Research Organisation (ISRO).
  • Under the Gaganyaan schedule-
  • Three flights will be sent into orbit.
  • There will be two unmanned flights and one human spaceflight.
  • The Gaganyaan system module, called the Orbital Module will have three Indian astronauts, including a woman.
  • It will circle Earth at a low-earth-orbit at an altitude of 300-400 km from earth for 5-7 days.
Source- Financial Express 

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