The Indian Space Research Organisation (ISRO) conducted a short-duration hot test of its semicryogenic engine at the ISRO Propulsion Complex (IPRC) in Mahendragiri, Tamil Nadu, on April 24, 2025. This marks the second major milestone after the first successful hot test on March 28, 2025. The test validated engine start-up procedures and is critical for future launch vehicle development.

BulletsIn

• ISRO conducted a short hot test on April 24 at IPRC, Mahendragiri.
• Test lasted 3.5 seconds; validated engine start-up sequence.
• Engine ignited successfully, ran at 60% rated power.
• Stable, controlled engine performance achieved during test.
• Test used Engine Power Head Test Article (excluding thrust chamber).
• Crucial data gathered to finalise full engine operational sequencing.
• Tests focused on turbo pumps, preburner, and control systems.
• Second major milestone after March 28 successful hot test.
• Series of further qualification tests planned ahead.
• Engine will be used in ISRO’s future launch vehicles after validation.