Gaganyaan Mission: ISRO Successfully Test-Fires Low Altitude Escape Motor Of Crew Escape System

by Swarajya Staff - Aug 11, 2022 09:45 AM +05:30 IST
Gaganyaan Mission: ISRO Successfully Test-Fires Low Altitude Escape Motor Of Crew Escape SystemPic Via ISRO Website

In a significant development for India's upcoming maiden human spaceflight mission 'Gaganyaan', the Indian Space Research Organisation (ISRO) has successfully test-fired the Low Altitude Escape Motor (LEM) of the Gaganyaan mission's Crew Escape System from Sri Harikota in Andhra Pradesh on Wednesday (10 August).

"The Crew Escape System (CES) takes away the Crew module of Gaganyaan mission in case of any eventuality and rescues the astronauts," ISRO said in a statement.

In case of mission-abort during the initial phase of flight, LEM provides required thrust to CES, to take away crew module from the launch vehicle.

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 space agency said.

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, ISRO said.

The main objectives of the static test included evaluation of motor ballistic parameters; validation of motor subsystem performance and to confirm the design margins; evaluation of the thermal performance of nozzle liners, especially to confirm the erosion/ablative characteristics; validation of the integrity of all interfaces; evaluation of the head-end mounted safe arm (HMSA) based ignition system performance.

Further, the test also evaluated side thrust due to misalignment and variation in flow and other functional parameters including flow reversal.

Get Swarajya in your inbox everyday. Subscribe here.

An Appeal...

Dear Reader,

As you are no doubt aware, Swarajya is a media product that is directly dependent on support from its readers in the form of subscriptions. We do not have the muscle and backing of a large media conglomerate nor are we playing for the large advertisement sweep-stake.

Our business model is you and your subscription. And in challenging times like these, we need your support now more than ever.

We deliver over 10 - 15 high quality articles with expert insights and views. From 7AM in the morning to 10PM late night we operate to ensure you, the reader, get to see what is just right.

Becoming a Patron or a subscriber for as little as Rs 1200/year is the best way you can support our efforts.

Become A Patron
Become A Subscriber
Comments ↓
Get Swarajya in your inbox everyday. Subscribe here.
Advertisement

Latest Articles

    Artboard 4Created with Sketch.