• The ignition process is one of the most critical parts in the development of liquid rocket engine systems.
  • The recent SCE ignition is achieved using a start fuel ampule which uses a combination of Triethyle Alumnide and Triethyle Boron developed by Vikram Sarabhai Space Centre (VSSC). 

Semi-cryogenic engine (SCE)

• SCE utilizes liquid oxygen (LOX) as an oxidizer and refined kerosene as fuel. 
• ISRO is developing a powerful SCE that produces a thrust of 2,000 kilonewtons (kN). 
• This SCE is aimed at improving the payload capacity of the Launch Vehicle Mark-3 (LVM3) and future launch vehicles. 
• Liquid Propulsion Systems Centre, Bengaluru, is ISRO’s lead center for the development of SCE.
• These engines offer significant advantages over traditional cryogenic engines. 
  • The cryogenic engine uses liquid Oxygen as oxidizer and liquid Hydrogen as fuel (both kept at very low temperatures). It is usually the last stage of rockets.

Advantages of SCE 

• Easy storage and handling: Refined kerosene is lighter, needs less space and can be stored at a normal temperature.
• More thrust: They can carry huge weight to a higher altitude. 
• Other benefits: They are eco-friendlier and more cost-effective compared to cryogenic engines.