ISRO successfully tests hybrid motor to strengthen new propulsion system for rockets

Context

The Indian Space Research Organisation (ISRO) has successfully tested a hybrid motor. 

• The test was conducted at ISRO Propulsion Complex (IPRC) at Mahendragiri in Tamil Nadu.
  
  
  

?Key-highlights of the test

• The ISRO Liquid Propulsion Systems Center (LPSC) provided support for the test.
• The hybrid motor used Hydroxyl-terminated polybutadiene (HTPB) as fuel and liquid oxygen (LOX) as the oxidizer.
• Unlike solid-solid or liquid-liquid combinations, a hybrid motor uses solid fuel and liquid oxidizer. 
• This will pave way for a new propulsion system for the upcoming launch vehicles. 

Significance

• The motor is said to be advantageous due to its safe and green propulsion system.
• ISRO also highlighted that hybrid motors facilitate throttling and enable the re-start capability.